390 BRITISH ORIBATTD^. 



Legs of moderate length, hind pair extending a little 

 beyond the posterior margin. Femora without blades. 

 Claws monodadijle. Tactile hairs on all tibiae ; a whorl 

 of fine hairs on each of the three central joints of each 

 leg, and the usual fine hairs on the tarsi. 



Abdomen acorn- shaped, rounded and slightly trun- 

 cated anteriorly, pointed posteriorly ; without mark- 

 ings on the notogaster, which bears two longitudinal 

 rows of fine hairs. Genital and anal plates large, near 

 together, almost pentagonal. 



The ventral plate turns up posteriorly, passes within 

 the dorsal, and curls forward, thus making a rounded 

 return inside the creature, which is seen indistinctly 

 through both the dorsal and ventral plates, and has a 

 very puzzling appearance, looking as if one of the two 

 plates (dorsal and ventral) were shorter than the other 

 and rounded posteriorly, which is not the case. The 

 true structure may be ascertained by dissection. 



Nym.ph. 



This creature is active and walks fast. 



Colour. — Almost colourless, very slightly shaded with 

 grey or yellowish. 



Texture tolerably smooth, but entirely without 

 polish. 



Cephalothorax about one third of the entire length 

 of the nymph. Rostrum rather broad and rounded. 

 Rostral hairs long and slightly serrated, placed far 

 back. Palpi showing plainly at the side of the rostrum . 

 Behind the rostrum the cephalothorax widens consid- 

 erably, with a strong rounded shoulder on each side ; 

 where it joins the abdomen it is almost as wide as the 

 progaster. Pseudo-stigmata small and dorsal. Pseudo- 

 stigmatic organs very long, curving sharply forward 

 and downward at the distal ends, imbricated or slightly 

 serrated. Inter-lamellar hairs similar in size and 

 character to the pseudo-stigmatic organs, placed far 

 forward. 



