520 BRITISH OKIBATID^. 



transverse wrinkles. There are about four small, 

 thick hairs on each lateral margin and four on the 

 progaster; none of these hairs arise from apophyses 

 or project beyond the body (they are omitted in the 

 Plate). Genital and anal plates close together, the 

 latter not reaching anywhere near the end of the 

 abdomen, the former pentagonal, the latter diminish- 

 ing to a point. 



Nymjph. 



This nymph varies considerably with age. 



Colour of rostrum and legs chitinous- brown, not 

 very dark ; abdomen and hinder part of cephalothorax 

 yellowish-white. 



Texture slightly rough, dull, and entirely without 

 polish. 



Shape. — Much the same as that of the adult, but the 

 abdomen rather wider in the middle in proportion to 

 its length, and bifurcate posteriorly. 



Cephalothorax. — Rostrum broadly conical, with 

 curved sides ; behind the rostrum there is a very slight 

 gradual constriction, and then the cephalothorax 

 expands to nearly the width of the progaster ; the 

 outline of the hinder part is rounded. There are not 

 any markings on the cephalothorax, but it is rough 

 and granular. Rostral hairs as in the adult, and there 

 are a pair of hairs corresponding to the lamellar hairs, 

 large, thick, and curved inward. In full-grown 

 nymphs these last-named hairs spring from apophyses. 

 Pseudo-stigmatic organs rod-like, of moderate length. 

 The cephalothorax is somewhat depressed where it 

 abuts on the progaster. 



Legs inserted very near together, gradually dimi- 

 nished in thickness towards the distal ends. They are 

 short, the fourth pair not nearly reaching the hind 

 margin. They are bordered by curved hairs as in the 

 adult, but less strong. 



Abdomen raised along the line of the progaster, and 



