460 BRITISH ORIBATTD^. 



have not any fixed shape, size, or plan, hut they are 

 generally more or less angular. These ridges are of 

 about the same thickness in all reticulations, but the 

 interspaces vary extremly ; they are, however, seldom 

 less than four or five times as wide as the ridge ; they 

 often have one or more detached, raised, chitinous dots 

 in them. The ridges, even under a moderate power, 

 show a strongly undulated outline on each side, giving 

 them a moniliform appearance, as though they were 

 composed of coalesced dots, which probably is really 

 the case, considering what occurs in H. nodosa. This 

 appearance is stronger in some specimens than in that 

 from which fig. 7 was drawn. There are four longi- 

 tudinal rows of spatulate hairs on the notogaster, two 

 pairs on the hind margin, besides the central pair 

 before named, and a few on the progaster and edge. 

 The ventral surface is finely reticulated. The genital 

 and anal plates occupy almost the whole length of the 

 ventral plates ; they are of about equal width, the 

 former almost square, the latter a long oblong, slightly 

 narrowed posteriorly. 



Nymph. 



Colour of rostrum and legs red-brown, of the rest 

 of the body yellow-ochre or yellow-brown. 



Texture of rostrum and legs chitinous and rough ; 

 of the rest of the body leathery and rough. 



Cephalothorax very similar to that of the adult in 

 all respects except colour and texture, and that there 

 are much more signs of lamellsB, which, however, have 

 been rendered rather too strongly by the engraver in 

 fig. 2, and that the rostrum is more truncated, the 

 genae more plainly divided from the frons, and the 

 pseudo-stigmatic organs, although about the same 

 length, are less enlarged at the ends and show less 

 division into peduncle and head than in the adult. 



Legs similar to those of the adult, but the two front 

 pairs of femora have not got the peduncles so thin. 



