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Schulze (19366) compared the body outline of A. brum ti with that of certain fossil trilobites that it happens‘to resemble.


Neumann's original adult specimens from Ethiopia measued from 15 mm. to 20 mm. long and from 10 mm. to 13 mm. wide. The size range among available Sudan and Egyptian females is from 10 m. to 12 mm. long and from 7 m. to 8 m. wide. The dorsal integuent is marked most distinctively by large, symmetrical polygonal depressed areas bounded by rugose ridges; laterally the dorsal integument is evenly striated. A continuous, clear, and distinct sutural line divides the dorsal and ventral sur. faces. Discs, which are small and inapparent, lie in clups or lines in the integumental depressions, and short hairs are scat. tered anteriorly and posteriorly on the periphery of the body. The outline of the body is subquadrangular with parallel lateral margins, a bluntly rounded posterior margin, and a pointed pro_ jection of the anterior margin over the mouthparts. Tarsus I has two dorsal humps and the other tarsi each have a prominent sub. apical dorsal protuberance. Males have a narrow, rounded genital aperture; females have a transversally elongate, narrow genital orifice.


The n h closely resembles the adult, except for size and

absence 0 genital aperture. The larva has been described by Cunliffe (19145) and by Hoogstraal___d"an Kaiser (1956).

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ARGAS (CHIROPTERARGAS) BOUETI Roubaud and Colas-Belcour, 1933.
(Figures 23,24,33, and 34)


L N 9 0“ EQUATORIA PROVINCE RECCRDS 4 l Sunat Ta hozous rforatus haedinus Feb 7 Torit no 0 us 0 us Jan


These are the only records of this species from the Sudan.


Ar as boueti is known from scattered localities in Africa as far souéfi as Transvaal and is also present in the Near East. A

tick apparently of drier areas, which has been widely spread by its chiropteran hosts, the long.legged bat...argas is obviously more frequent than present meagre records indicate (Hoogstraal 1955B). Whether North Africa, the Near East, or the Ethiopian Faunal Region is its origin is difficult to determine from evidence at hand.

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WEST AFRICA: FRENCH WEST AFRICA CRoubaud and Colas-Belcour 1933. 'H66§§t¥EE1 1955B).

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SOUTHERN AFRICA: ANGOLA (Hoogstraal 1955B). UNION OF SOUTH AFRICA (Hoogstraal I955B. Subsequently, Dr. Zumpt has sent me

additional specimens from Tzaneen, Transvaal).

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Oton cteris _1_1. hem ichi, a bat which roosts in small caves, crevices EH Hches, us ly singly or with very few other of the same species, is most heavily infested in Egypt. Rhino nn h. cystoE, one of the most common cave-inhabiting ba s near airo, is requently heavily infested and probably represents the most important host in this area owing to its great abundance. All stages appear to feed on the kinds of bats.


Nymphs a.nd adults have bitten us in caves on a few occasions. They readily do so when allowed to in the laboratory (Hoogstraal 1952111954-4.19553).


Life Cycle

Rearing of A. boueti has been accomplished in our laboratories at temperatures Br from 30°F. to 90°F. with relative humidity ranging from M1 to 5%. Exceptionally large females may lay single egg batches of almost two hundred eggs over a two or three day period. An average size female deposits from 35 to 1.0 eggs in a single batch usually on a vertical surface. Afterwards, she


stands motionless over or next to the eggs for fifteen to 22 days until the larvae hatch. (Earlier, at unecorded high sumer room temperatures, we obtained hatching in eleven to fourteen days). Larvae attach to a host after twelve to fifteen days (earliest host offered), and feed from eight to 42 days, but mostly from sixteen to 25 days. Afterwards, larvae may require from four

to thirteen days before molting to first instar nymphs, but they usually do so after four to seven days.

Nymphs molt two or, uncommonly, three times before reaching adulthood. In ou laboratory, those n hs that reach adulthood after two melts have never fed IE-the n ha[ st e, even ug Eats 42?; frequentIy offered:- Rheh-E t%Ird instar nymph, which has not molted to an adult, feeds it does so for half an hour to an hour from seven to 26 days after the previous molt and becomes an adult from twenty to 32 days after feeding. The duration of each nymphal instar is seven to seventeen days for the first in. star, with eleven to fourteen days the most common. The duration of the second instar is longer, from sixteen to 43 days, with 22 to 29 days average. The duration of the third stage, when it occurs, is erratic and lasts from 27 to 58 days. No significant data on sexual differentiation from the unusual third nymphs have been obtained.


Adults feed for thirty to 35 minutes beginning some five days after molting. Further studies on the life cycle of progeny are under way.

A biting tick remains motionless duing feeding. It often stands the full length of its anterior legs away from the point of insertion of mouthparts that are extended by a pendulous tube fronithe basis capituli. Once the hypostome is inserted, the host's hand or arm (or the bat) may be moved freely till the tick is satiated without causing it to remove its mouthparts. When blood is rapidly engorged a large drop of clear coxal fluid appears beneath the body, but none is emitted during slow feeding. Repletion from the human hand or arm requires from 25 to 35‘ minutes but full engorgement from the membrane of a bat's wing may require three or four hours. Individuals that feed slowly become very lethargic ad one may remove them, even though fully fed, after seven to 24 hours with the mouthparts still inserted in the wing membrane. Itching at the site of the bite on man may persist for several weeks.

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