DESCRIPTIONS OF GENERA AND SPECIES. 223 



white concretions make it look granular when the 

 creature is not in liquid. 



Shape. The male, without the rostrum, is not very 

 far from oblong ; but somewhat enlarged behind the 

 fourth pair of legs ; the posterior end is rounded ; the 

 back slightly arched. The virgin female is about the 

 same shape as the male, but as the eggs are developed 

 it becomes more and more suddenly and strongly 

 enlarged behind the fourth pair of legs ; the drawing 

 is made from a specimen where the eggs are about 

 half developed. 



Male (fig. 2). Rostrum long and chitinized. The 

 mandible (PI. Ill, fig. 19) small, blade-like, ending 

 distally in a pointed hook ; set with small teeth of 

 even size throughout and close together. 



Flogella of palpi very long, the longest of any known 

 species except H. fimetarium, which has them equally 

 long. Body smooth, without mammillae or lumps of any 

 sort on the dor sum, and without markings. There are 

 two pairs of short hairs on the dorsum of the cephalo- 

 thorax, two longer on the shoulders, and two longer 

 pairs on or near the hind margin. Under side flat ; 

 epimera of the first pair of legs joined to the short 

 sternum ; all the other epimera free. Male organ 

 placed between, or a trifle behind, the coxae of the 

 fourth legs ; anus immediately behind it. There is a 

 pair of chitinous rings (? suckers) between the ends of 

 the epimera of the fourth legs, but near to the median 

 line of the body ; and another pair, one on each side of 

 the male organ, but much further apart. Legs rather 

 long, particularly the fourth pair, which extend consi- 

 derably behind the hind' margin of the body. The fourth 

 pair are curved inward ; there is a spine on the under 

 side of each coxa, a very small spine on each genual 

 and tibia, a whorl of stronger spines about the middle 

 of the tarsus : there is a small spine near the claw in 

 each tarsus, and there is a large curved spine immedi- 

 ately above the claw on the first leg only ; this spine 

 is almost as large as the claw, and a good deal like it. 



