CHIGGERS — FARRELL 121 



single nonspecialized seta attached distally at the posteroventral 

 margin. The telofemur bears five nonspecialized setae, three 

 proximally in a transverse row across the dorsal surface and two 

 on the ventral surface. The genu bears four nonspecialized setae 

 about evenly spaced around it on the proximal half. Usually it 

 has, also, two rather long, pointed, striated, specialized setae — 

 the genualae. One of these is dorsal and anterior; the other is 

 posterior. A small, pointed, striated microgenuala is located dis- 

 tally on the dorsal surface. The tibia usually has seven nonspe- 

 cialized setae, one proximally on the dorsal surface, one at the 

 middle of the anterior dorsal margin, one on the posterior dorsal 

 margin, and four on the proximal half of the ventral surface. 

 The tibia bears two striated, specialized tibialae. The tibiala on 

 the distal, dorsal margin is somewhat blunt; the one proximal 

 to it is pointed. Just posterior to the distal tibiala is a small, 

 pointed, striated microtibiala. The tarsus bears about 22 non- 

 specialized setae. Near the middle of its dorsal surface is a 

 strong, blunt, striated seta, the spur. Slightly distal, usually, to 

 the spur is a small pointed striated seta, the microspur. Distally 

 and anteriorly, on an eminence of the tarsus in all but two species, 

 are two striated setae. The larger and more distal of the two is 

 the subterminala ; the smaller, slightly more proximal, is the 

 parasubterminala. Beyond the eminence of the tibia, the segment 

 tapers quickly to the rather slender pretarsus, at the end of 

 which are two lateral, curved claws with a thinner curved 

 empodium between them. On the posterior edge of the pretarsus 

 just proximal to the claws is a pointed, striated seta, the pretar- 

 sala. 



The coxa of leg II is contiguous with coxa I. It has a long, 

 nonspecialized seta attached at its posterior margin. A long, 

 nonspecialized seta is fastened proximally on the anterodorsal 

 margin of the trochanter. The basifemur bears two nonspecial- 

 ized setae, one anterior and one posterior. The telofemur has four 

 nonspecialized setae, three proximally in a transverse row across 

 the dorsal surface and one on the anterior surface. The genu 

 has three nonspecialized setae spaced around the proximal half. 

 On its middorsal surface, usually, is a pointed, striated seta, the 

 genuala. The tibia bears six nonspecialized setae — one anterior 

 and one posterior on the dorsal surface, two on the ventral sur- 

 face, and one each on the anterior and posterior surfaces. Two 

 striated setae, the tibialae, are located on the dorsal surface in 

 tandem. The proximal tibiala is more pointed than the distal. 



