lA Studies on Arthropoda. I. 



what produced, with the terminal margin straight, the comer 

 angular, and this angle measures 90° — 95°. Femur uncommonly 

 slender, more than two and a half times as long as deep, with 

 the lower margin nearly straight though slightly sinuate, but 

 without any protruding angle towards the base. Patella a little 

 less than three times as long as deep. Tibia slightly more than 

 three times as long as deep. Tarsus unusually long, as its upper 

 margin is as long as the lower margin of the tibia; claw only 

 one-fourth as long as the upper margin of the tarsus. 



First pair of legs (fig. 3 a) slender, somewhat more than 

 half as long again as the body. Coxae terminate scarcely before 

 the outer angle of the mandibles (maxillae auct.). Femur a little 

 longer than tibia. Foot a little shorter than tibia, about nine 

 and a half times as long as deep (fig. 3 d), deepest near the end 

 of metatarsus; second joint of the metatarsus almost as long 

 as the sum of the four proximal joints plus half of the fifth 

 joint of the tarsus; terminal joint a little longer tlian fourth 

 and fifth tarsal joints combined, and a little more than half 

 as long as the whole metatarsus. 



Fourth legs somewhat longer than tlie body; femur scarcely 

 two and one-third times as long as deep (fig. 3f). 



Three posterior abdominal segments telescoped and very 

 considerably thicker (fig. 3 i) than in the other sex ; last seg- 

 ment without any protuberant part above the insertion of the 

 flagellum. 



Flagellum (figs. 3 h and 3 i) of very moderate size, somewhat 

 less than twice as long as broad, but almost two and a half 

 times as long as deep, consequently its thickened part consider- 

 ably depressed. The stalk rather compressed, seen from above 

 a little more than one-third as long as the main piece. Seen 

 from above, the main piece is only one-fourth as long again 

 as broad, broadest at the middle, with the proximal half of 

 the lateral margins rather convex, and the distal half to a little 



