580 BRITISH ORIBATID^':. 



well arise from altered circumstances; but the differ- 

 ence in the size and nature of the hairs, and of the 

 pseudo-stigmatic organs, and many other details, can 

 hardly be so explained. There is not any reason from 

 analogy to suspect dimorphism in the nymph, and 

 therefore it seems more probable that there may be 

 two species, the imagos of which are extremely difficult 

 to distinguish from one another. 



Colour very slightly yellowish, almost colourless, 

 highly transparent. The alimentary canal with its 

 appendages and contents shows most distinctly through 

 the dorsal surface, generally producing a colouring 

 which is at once soft, brilliant, and varied ; but it is 

 entirely due to this cause. 



Texture polished, but slightly reticulated, the 

 reticulations, however, are so delicate and transparent, 

 that I have not attempted to depict them in the plate, 

 as doing so would, I fear, result in great exaggeration 

 and an incorrect effect. 



Cephalothorax nearly as broad as the abdomen 

 where they meet, but divided from it by a slight 

 sulcation. Rostrum curved, rather blunt, but pointed. 

 Rostral hairs very dorsal, set far back, close together, 

 slightly serrated. Palpi very conspicuous. Pseudo- 

 stigmata rather dorsal. Pseudo-stigmatic organs 

 short, pyriform. Interlamellar hairs long, curved, 

 serrated. 



Legs rather long, of about even thickness through- 

 out. The two front pairs of femora are turned 

 sharply inward, almost at right angles, at their proximal 

 ends ; genuals rather long ; tibiae clavate ; tarsi in- 

 versely pyriform, rather long. Tactile hairs on all 

 legs, those of first pair very long ; a whorl of curved, 

 serrated hairs on each of the three central joints of 

 each leg, and some fine hairs. 



Abdomen pointed posteriorly, truncated anteriorly ; 

 arched ; without markings except the before-named 

 reticulations, but with a very long serrated hair on 

 each antero-lateral angle ; six or seven pairs of similar 



