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The count of three pairs of pointed hair tufts noted by Karsch for M. winthemi was probably due to the dry, greasy, rubbed condi_ tion'of £55 specimen. Fresh specimens bear six pairs of posterior hair tufts; these are not pointed.

Subsequently, the generic description of Mar aro presented by most writers has included the statement that ti? Esanal shields

are jOil6d anteriorly, a fact true for M. winthemi, though dif_ ficult to discern in many specimens, but not true for M. reidi sp. nov.

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The genus may be redefined as follows: Males with expanded leg se nts that are more or less deeply separated from each other partially noncontiguous); adanal shields arising at level of coxa IV and extending posterior of anus; tarsi elongate, nar. row, tapering, with a large, apical, hooklike pojection; palpi intermediate between those of Boo hilus and Rhi ice halus, not ridged as in former genus; integument with conspicuous hairs posteriorly; with eyes (may be indistinct in M. winthemi); unornamented. Females with leg segments not greatly Nidened but other leg characters similar to those of male. Palpi inter.

mediate between those of Rhipicephalus and Boophilus. Eyes distinct.

DISEASE RELATIONS

Although circumstantially associated with babesiosis, Babesia bigemina, no actual relation of this tick to any pathogenic or; ganism as been demonstrated.

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IDENTIFICATION

MALE: Length overall up to 3.7 mm., width 2.5 mm.; color reddish brown; outline oval with integument bulging beyond scu_ tum laterally and posteriorly; with caudal protrusion when engorged.

Ca itulum: Basis ca ituli approximately twice as wide as long, a er margins curve , asal margin concave; bearing a

horizontal row of eighteen to twenty hairs at level of midlength; ventrally with straight posterior and lateral margins, the latter converging basally. Pal i: Overall length and width of each palpus appoximately'§§EEI dorsally; segment I just barely visible dorsally, longer ventrally; segment 2 quadrate with a slight an. gular projection at the inner basal juctue, length one.third greater than that of segment 3; segment 3 compressed, semi. circular, with broadly pointed outline distally; ventrally seg. ment 3 with a broadly triangular retrograde spur. H stome twice as long as wide, apex rounded with a slight megigi noich and with distinct corona; dentition 4/4, with five or six den. ticles in inner files increasing to nine or ten denticles in outer files.

Scutum: Outline slightly convex laterally, more acutely converging anteriori , bluntly rounded posteriorly; two.thirds

as wide as long. Posteromedian Ezoove shallow, narrow, elongate;

paramedian grooves simiIar but a orter; cervical Egooves conver. ior y,

gent anter hence divergent for three-fourt o heir length, extending one.third of scutal length. Hairs on scutu pale, shorter than lateral hairs; numbering aboui iwelve in each scapular area and about twenty anteriorly between the cervical grooves; a row in place of the outline of the female scutu; others scattered in irregular lines on posterior half of scutum; a few rows of longer hairs on integument beside scutu, those posterior of the spiracular plates forming six pairs of longer hair tufts each clup of which consists of five to ten hairs.

es extremely indistinct; small, flat, situated on lateral mar. gin at the level of coxa II.

S iracular plate subcircular, with two rows of large goblets encircling the aperture. Genital a rture situated at level of anterior half of coxae II; outIine bro§dIy rounded anteriorly, gradually converging laterally, bluntly angled posteriorly. Genital grooves mildly undulating from aperture to anus, thence

widely divergent to spiracular plates. Preanal shield with

broadly to narrowly rounded anterior margin, situated between genital grooves from level of posterior half of coxae IV to

anus, projecting beside anus as two tapering, narrowly pointed, robust spurs (adanal shields); ccessory shields absent. Hairs on integuent beiween genital grooves and coxae arranged in Ehiee irregular rows extending from level of coxa I to spiracular plate;

about five irregular rows within genital grooves; two irregular rows of widely spaced hairs between level of anus and posterior margin. Ventral hook situated medially at posterior margin, on caudal potrusion of engorged specimens, articulated to body basally, free from base to apex; twice as long as wide; anterior margin straight; lateral margins parallel, posterior margin blutly rounded.

Legs: Coxae equidistant from each other, almost contiguous; outline of eacfi with rounded junctues, I and IV subtriangular, II and III subquadrate; IV with a slight, indistinct blunt spur posteriorly near the outer margin; I with a similar spur and a slightly raised ridge at the apical juncture; coxa I without a pointed dorsal projection visible from above. Free se ts of legs I and II subequal, those of III slightly larger, éfigse of IV enormously widened; segments partially joined giving legs a "beaded" appearance especially on legs III and IV; constric. tion between first and second segment of each leg especially narrow; several conspicuous irregular rows of long pale hairs on dorsal surface of each segment, forming tufts at apex of seg_ ments on III and IV; an apical row of hairs encircling most seg_ ments, a few lateral and ventral hairs also present. Tarsi clawlike, with a narrowly pointed apex and small subapIE§I'spur ventrally; clas articulated dorsally and subapically, strongly recurved ar3§Rd'pads.

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FEMALE: Notably differing from male in that free segments of legs, while robust, are not greatly enlarged; also lacking a ventral hook and conspicuous lateral hairs and hair tufts. Other characters recall those of the male.

Length of engorged specimens reaching 6.6 mm.; width 3.9 mm.; co or, when uengorged, yellowish.

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Ca itulum: Basis capituli three times as wide as long, lateral margins strongly convex, posterior margin very slightly concave; porose areas large, ovate, situated directly posterior of each palpus; ventral outline similar to that of male but with lateral margins more acutely angled. Pal i slightly longer than wide; larger than those of male; segmen approximately three.fourths as long as segment 2; apex subcircular; ventral. ly segment 3 with a very slight ridge in place of the retrograde

spur of the male. H stome larger than that of male and with seven or eight dent c es in inner files and ten or eleven denticles in outer files; otherwise similar to that of male.

Scutum: Len h.width ratio appoximately equal, lateral margins grad y tapering from scapulae to eyes and from eyes to bluntly rounded posterior margin. es oval, slightly arched, more distinct and larger than in male, s uated on lateral margin at widest point of scutum. Cervical gzooves curved aroun eyes and extending to posterolateral margin is ally; delineating a broad median, slightly shagreened fiehd bearing widely scattered, short hairs.

S iracular E%ate subcircular, with thee rows of large gob. lets encirclfig aperture. Genital a rture shield shaped, in same position as in male. Genital grooves similar to those of male to level of anus, where they con lnue as slightly convex grooves extending almost to the posterior margin of the body. Hairs in lines similar to those of male except that these lines extend almost to posterior margin of body; hairs laterally only slightly longer and denser than ventrally.

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Le s robust but not markedly modified. Coxae similar to those 0? males except that they are wider in relation to length and the spurs and ridges are even more reduced. Free segmgnts with marked constriction between first and second segmen s lar to that of males. Tarsi longer and narrower in comparison to those of males but otherwise similar; claws and pads similar

to those of males.

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NYMPH and LARVA: Undescribed.

RHIPICEPHALUS APPENDICULATUS

DAUBNE! (1942). Kenya. Infection with_T. parva; brief mention of research published elsewhere.

DAUBNEY (1944). Kenya. Transmission of T. parva by R. avus like that in R. agpendiculatus under-experimentaI conditions. Transmission of ro s ep disease.

TENDEIRO (1955). Mozambique. Review of previous reports from colony.

THILER (1956 correspondence). Additional host records in Onder_ stepoort collection. Number of collections indicated in parenthesis. These data add significantly to ou knowledge of hosts, especially of imature stages, of the brown ear. tick. Recall that immatue stages ae also very comon on domestic animals but that these records are not listed in

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Antelo s: Impala from Zululand (2), and fro Mozambique (3). er 1: (3) and duiker (1) from Zululand. ngpringbok 1) from South Africa. Reedbuck (3), bushbuck (2), waterbuck (l), and nyala (1); alluffrom Zululand; also waterbuck (1) from Uganda. Kudu from zul and (2), Northern Rhodesia (2), Mozam. bique (1), and Ngamiland (2).

Buffalo: From Zululand (2) and Uganda (1).

Carnivores: Lion from Transvaal (3) and Northern Rhodesia (1). Leopard from Transvaal (2), Mozambique (1), Northern Rhodesia (1), ad Kenya (1). Cheetah from Southwest Africa (1). Striped hyena from Southern Rhodesia (l) and Tanganyika (1).

Pi s: Warthog from Zululand (3) and Uganda (1). Bushpig from uland (1) and Ngamiland (2).

Hares and rats: Rattus rattus from Uganda (1). Has from South §f¥ica (1).

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