IXODES RUBIDUS NEUMANN, 1901 1901. Ixodes rubidus Neumann, p. 282, original description. FEMALE Body. Well sclerotized, brownish yellow. Capitulum. Length, 0.66; width, 0.465. Dorsum of basis in general level with the straight lateral margins converging posteriorly; posterior margin nearly straight, salient. Cornua absent; postero-lateral corners a little emphasized in some specimens. Porose areas suboval, depressed, separated by about the width of one. Palpi unusually broad, with the lateral profile lines straight, the inner edges rounded; widest at the distal end of article 2. Combined length of articles 2 and 3, 0.42; width, 0.18. In ventral view basis is broadly rounded and salient behind; slightly constricted at the middle; auriculae absent; surface convex, smooth, shining, and faintly crazed. Palpi flattened on their inner faces; article 1 with a small oval plate; hairs short and few. Hypostome. Rounded apically, widest at the middle. Denticles arranged 2/2; those of the lateral files longer and more pointed than those of the median files. Length, about 0.33. Scutum. Usually slightly longer than wide. Largest scuta measure 1.26 by 1.12 and 1.14 by 1.23. Widest at about the middle, broadly rounded behind. Scapulae long and pointed. Lateral carinae placed near the antero-lateral borders, straight or a little curved, and with the two sides of the carina equally declivitous. Cervical grooves short, shallow, and divergent; visible only back of the middle of the scutum. Surface smooth and shining; punctations moderate in size. Legs. Smooth and shining with the hairs short and stout. Subapical hump on tarsus I distinct, less prominent on II, III and IV. Length of tarsus I, 0.63; metatarsus, 0.48. Length of tarsus IV, 0.48; metatarsus, 0.42. Coxae. Surfaces flattened, smooth, shining and with punctations very fine or absent; salient on posterior edges. Hairs few. Internal spur on coxa I long, slender; absent on II, III, and IV. External spurs short, on all coxae, scarcely visible in some specimens. Spiracular plate. Suboval, with the larger axis transverse; surface a little concave. Macula eccentric on the anterior side. erate in number and size. Length, 0.39; width, 0.33. Goblets mod Genital aperture. Between coxae III. NYMPH Capitulum. Broad and nearly flat on top. Cornua short, pointed, a little divergent; posterior margin straight and salient. Palpi short, wider distally, with the lateral profile lines nearly straight and the inner edges more curved. Article 1, viewed dorsally, with a short horn directed anteriorly. Sutural line between articles 2 and 3 faint. In ventral view basis is constricted at the middle, wider in front than behind, with the posterior margin rounded. Auriculae present as low curved ridges. Palpi flattened on their inner faces; article 1 with a small tooth. Hairs few in number. Hypostome. Rounded apically. Denticles arranged 2/2 with the laterals only a little larger than the medians. Length about 0.192. Scutum. Length, 0.495; width, 0.54. Width a little greater than the length; widest near the anterior end, broadly rounded behind. Scapulae short and blunt. Lateral carinae short, straight, near the FIGURE 60. I. rubidus Neumann. A. Female capitulum and scutum, dorsum. B. Female capitulum and coxae, venter. C. Female hypostome. D. Female spiracular plate. E. Female metatarsus and tarsus, leg I. F. Female metatarsus and tarsus, leg IV. G. Nymph capitulum and scutum, dorsum. H. Nymph capitulum and coxae, venter. I. Nymph hypostome. J. Nymph spiracular plate. convex. Male unknown. FIGURE 61. Distribution of I. signatus Birula, I. rubidus Neumann, and I. dampfi Cooley. antero-lateral margins. Cervical grooves distinct, long but shallow; convergent and then divergent, and extending for the greater part of the scutum. Surface smooth, shining, crazed, impunctate. Hairs absent. Legs. Essentially as in the female. Coxae. Essentially as in the female but with the internal spur on coxa 1 short and blunt. Spiracular plate. Oval with the longer axis transverse. Surface HOSTS AND DISTRIBUTION Neumann's original description is based on one female and three nymphs collected by A. Dugès on Bassariscus astutus (ring-tailed cat), Guanajuato, Mexico. The types, No. 713, are in the Neumann Collection. We have 13 females sent by G. B. Fairchild, 19816, Finca Terida, Boquette, Chiriqui, Panama, from Tayra barbara. IXODES MEXICANUS COOLEY AND KOHLS, 1942 (FIGURES 62, 59) 1942 (c). Ixodes mexicanus Cooley and Kohls, pp. 149-152, original description. FEMALE Body. Partly engorged specimen, broad oval, wider behind. Color of scutum, capitulum and legs, yellow brown. Size 4.5 by 3.5. Capitulum. Length of the capitulum of holotype (from posterior margin to tip of hypostome) 0.69; width 0.405. Basis capituli, with the dorsal surface in one general convexity which is limited at the sides by marginal ridges. Marginal ridges prominent, extending from the postero-lateral angles to the base of the chelicerae. Porose areas large, subcircular, superficial, with the limiting margins not clearly defined, separated by less than the diameter of one. Posterior margin straight, salient. Cornua absent. Palpi long and blunt apically; lateral profile lines nearly straight, inner edges convex, widest at distal end of article 2. Combined length of articles 2 and 3, 0.51; width 0.075. In ventral view basis capituli is broad and a little constricted at the middle; posterior margin broadly rounded, salient. Auriculae as short, curved horns which are about as long as the width at their bases. Palpi flattened on the median surfaces; article 1 with an oval plate. Hairs few, fine, and short. Hypostome. Long, attenuated, and very sharp. Denticles arranged 3/3, with the laterals only a little larger than the medians. Length about 0.39. Scutum. Length in holotype 1.20, width 0.9. Length in paratype 1.34, width 1.02. Oval, widest near the middle; broadly rounded behind. Cervical grooves starting at the scapulae, broad, first convergent and then divergent. Punctations distinct, moderate in number and mingled with irregular rugae in the antero-lateral areas. Hairs few in number. Scapulae pointed and mildly tumescent on top. Legs. Moderate in length and size and with hairs few and small. Tarsi long, small, and tapering gradually. Length of tarsus I, 0.66; metatarsus, 0.42. Length of tarsus IV, 0.54; metatarsus, 0.45. Coxae. Surfaces mildly convex and with a few long hairs. Internal spur on coxae I very short; absent on II, III, and IV. External spurs on all coxae very short. Spiracular plate. Oval with longer axis transverse. Surface nearly flat. Macula near the center. Goblets moderate in number and size. Size 0.278 by 0.24. Genital aperture. At about the level of coxae III. Male unknown. HOSTS AND DISTRIBUTION This species is known only from the type specimens taken in Mexico, as follows: holotype, female, wren (Heleodytes gularis), August 1940, Tancitaro, Michoacán, Mexico; elevation 6,000 ft., H. Hoogstraal; paratype female, junco (Junco phaeonotus australis), July 17, 1940, Cerro Tancitaro, Michoacán, Mexico, elevation 11,000 ft., H. Hoogstraal. The types are in the collection of the Rocky Mountain Laboratory. 648696-46-11 |