409 



SEVENTEENTH ANNUAL REPOKT. 



110 /< broad; on dorsal surface of the articles, especially of the first and at the 

 dorsal base of the capitulum, in back of the insertion of the palpi, numerous pennate 



Fig. 94.— Dorsal view of spinose nymph of ear tick. Greatly enlarged. After Marx, 1895, PI. II, fig. 1. 



hairs. Two ventral hairs at the base of the capitulum. Legs thinner and a little 

 shorter than in the nymph; coxae as in the other members of the genus; promi- 

 nent tuberosity on dorsal surface of the tarsi. 



Dimensions. — Females, 5 to 6 mm. by 3 to 4 

 mm. ; males somewhat smaller. 



Nymph. — Body somewhat longer than broad, 

 greatest breadth at about III pair of legs, anterior 

 of this the outline is bluntly rounded; posteri- 

 orly, suddenly contracted at IV pair of legs; may 

 attain 3 to 8 mm. in length and 2 to 5.5 mm. 

 in breadth. Tegument 

 thickly beset with spines 

 anteriorly, and bristly 

 hairs posteriorly ; the 



Fig. 95. — Ventral view of spinose 

 nymph of ear tick. Greatly en- 

 larged. After Marx, 1895, PI. II, fig. 

 la. 



Fig. 96.— Digit ui 

 mandible of 

 nymph. After 

 Neumann, 1896, 

 p. 43, fig. 36a. 



former occupy a crescentic band dor- 

 sally, the horns of the crescent extend- 

 ing to legs III or IV, but ventrally the 

 spines extend to or slightly beyond the 

 anus. Stigmata on salient tubercles, 300 to 350 /i in diameter. 

 Anus very small, slightly broader (110 to 120 //) than long. 

 Capitulum subterminal in young, inferior in older individuals, 

 elongate, base as long as palpi ; about 375 jti from base of palpi 

 to tip of hypostome. Mandibles 760 jti, digit 85 ju, base scarcely 

 swollen posteriorly; internal apophysis of digit strong, with four 

 teeth, two external and terminal, two small and intermediate; external apophysis 

 with long, strong poster-posterior teeth; median apophysis normal. Hypostome 

 lanceolate, each half with four rows of seven to nine strong alternating teeth, the 



Fig. 97.— Digit of 

 mandible of adult. 

 After Neumann, 

 1896, p. 43, fig. 36b. 



