SCUTOVERTEX BILINEATUS. 673 



Nymph. 



It would not be easy to distinguish this nymph from 

 that of 8. scnlptus, both being variable creatures, were 

 it not for the absence of external pseudo-stigmatic 

 organs in the present species. 



Colour usually dark rich umber-brown with a 

 greenish tinge ; rostrum darker. 



Texture dull and leathery. 



Cephalothorax conical, rather long, broad at the 

 base, irregularly dotted, and with wrinkles which en- 

 close a more or less square space on the posterior part 

 of the dorsum of the cephalothorax, and a more or less 

 triangular space on the rostrum, which usually has a 

 sort of median carination ; and there are irregular wavy 

 wrinkles at the sides of the square space. These 

 markings, however, vary in different specimens. Ros- 

 trum somewhat truncated ; rostral hairs near together. 

 No external pseudo-stigmata nor pseudo-stigmatic 

 organs visible. 



Legs much like those of the adult but shorter (par- 

 ticularly the tibiae) ; the femora of the two front 

 pairs have not the thin proximal ends. The ungues 

 are dark coloured. 



Abdomen. — Progaster rather concave : it is the 

 widest part of the body ; the lateral edge immediately 

 behind it forms a lobe, behind which the abdomen 

 narrows slightly and gradually to the rounded hind 

 margin. Notogaster almost flat, deeply corrugated 

 by irregular waved wrinkles of the cuticle, a few of 

 which run on to the corner of the cephalothorax, cut- 

 ting off a triangle on each side. Probably the wrinkles 

 do not agree in any two specimens, but it is perhaps 

 the commonest form that a few of the wrinkles, 

 about six or seven, run more or less parallel to the pro- 

 gaster, but become shorter as they recede from it ; and 

 that those on the central part of the notogaster are 

 wholly irregular ; while those at the posterior end curve 



