NOTHRUS MONODACTYLUS. 529 



which are usually concealed beneath the abdomen, and 

 by the monodactyle claws. 



Colour light whitey-brown. 



Texture dull, but not rough, not very highly chiti- 

 nized. 



Cephalothorax long, considerably narrower than 

 the abdomen. Eostrum rather broad, round-pointed 

 in the centre, suddenly bowed outward at the sides. 

 E-ostral hairs rather long and far apart. No pseudo- 

 stigmata of the ordinary type are visible, there is, how- 

 ever, undoubtedly a long setiform hair on each side 

 about where the pseudo-stigmata would be likely to be 

 placed ; whether it is to be regarded as the representa- 

 tive of the pseudo-stigmatic organ or of the inter- 

 lamellar hair it is diflBcult to say. This hair is acci- 

 dentally omitted in the figures, but a similar hair is 

 shown in the figure of N. tardus, a species greatly 

 resembling the present one, but larger and with 

 tridactyle claws : the hair is stronger in N. tardus. 

 The apodemata are joined to the sternum, except the 

 third ; in which case the apodemata from the two sides 

 join, the sternum ceasing in that part of the body and 

 commencing again farther back (fig. 11). 



Legs very short and thick, the first pair scarcely 

 passing the point of the rostrum, the fourth pair reach- 

 ing only a little beyond the commencement of the anal 

 plates. The third and fourth pairs are set very much 

 under the abdomen, and unless artificially extended 

 are usually wholly hidden from the dorsal aspect. 

 The tibiae are scarcely if at all longer than the genuals. 

 The tarsi are thick and blunt-ended ; each has a short, 

 but very thick and strong, curved, rather tooth-like 

 spike of clear chitin in the median line a little before 

 the claw, and a similar but smaller spike at the side 

 near the distal end; there is also a curious, squarish, 

 tab-like process on each side of the claw. The third 

 and fourth tarsi, particularly the latter, have quite a 

 bunch of small thick spikes or teeth at the distal end. 



VOL. IL 34 



