8 Studies on Arthropod a. I. 



margin nearly or scarcely twice as long as the transverse dia- 

 meter of the tubercle. 



Interior prehensile margin of the basal joint of the antennae 

 with four teeth, and the most distal tooth bifid, while the ex- 

 terior margin has no tooth. 



Palps about as long as the body. Trochanter with two small 

 processes on the anterior margin (in fig. la the proximal spine 

 is overlapped, not visible) ; the robust process on the lower 

 side with a number of strong setae on the inner and lower sur- 

 face. Femur in the adults at least a little shorter than the 

 cephalothorax ; its upper front margin proximally with two 

 small, conical, setiferous tubercles, more distally three or four 

 processes, the first moderately long, the others decreasing in 

 length, and the fourth, if present, quite short; the lower front 

 margin (fig. I a) with at least three processes decreasing in 

 length from the first to the third, and the first which originates 

 near the base, is long; sometimes a small or very small fourth 

 process is found. Tibia on the upper margin with four processes 

 (fig. ib), the second and especially the third very long, strong, 

 with a setiferous protuberance or rather an offset on the prox- 

 imal side somewhat from the base; the first process is only 

 about half as long as the next, but longer than the fourth; 

 frequently a setiferous conical protuberance is found before 

 the first real process; the lower margin (fig. la) on the distal 

 half with two moderately long processes, the proximal shorter 

 than the distal, and this margin has besides three or four quite 

 small setiferous tubercles. First tarsal joint has on the upper 

 margin (fig. i c, ) near the middle two processes, the 

 second considerably to very much longer than the first, while 

 the lower margin has a single moderately long, porrected pro- 

 cess a little before the end. Second tarsal joint (fig. i c) with 

 two slender processes on the upper margin, the distal from con- 



