360 



U.S. NATIONAL MUSEUM BULLETIN 236 



Figure 142. — Onychocamptus armiger (Gurney), loc. 590, ad. ?: a, whole animal, dorsal 

 view; h, same animal, lateral view from right side; loc. 489, ad. cf : c, whole animal, lateral 

 view from right side. (X 165.) 



caudally, by row of hairs. At the posterior end of the cephalothorax 

 there is, in the median plane, a big, caudally directed highly chitinized 

 spine, placed on an elevated part of the cephalothorax, forming a 

 socle. Rostrum present as flat plate, truncate at apex and carrying 

 two fine hairs in two small incisions; rostrum reaches half length of 

 2nd antennular segment and is shghtly curved downward. Dorsal 

 surface of cephalic somite with number of chitinized ridges, whole 

 integument has very distincly pitted structm-e. Thoracic somites 

 2 to 5 of nearly equal length, epimeral plates rounded. In middorsal 

 line each of somites carries strongly chitinized, backwardly directed 



