NOTHRUS HORRIDUS. 509 



did not consider N. liorridus, N. bicarinatus, and N. 

 hiverrucatus to be three separate species, I am not abso- 

 lutely certain to wliicli the nymph belonged. I have 

 not had an opportunity of breeding it since. 



This singular and extremely dirty nymph was made 

 into two distinct species by C. L. Koch, who evidently 

 did not suspect that they were only immature stages ; 

 his N. runcinatus and N. sinuatus are clearly only 

 nymphs at different ages. Nicolet pointed this out. 



Colour. — A dirty yellowish white, varying to pale 

 ochre-colour, the legs and cephalothorax are redder ; 

 the whole creature, however, is frequently so covered 

 with dirt and extraneous matter sticking to it that it 

 is difficult to see either colour or shape. 



Texture granular, when it can be seen. 



Cephalothorax. — The rostrum is really short and 

 much curved downwards; it is, however, usually entirely 

 concealed by a strange-looking projection, which ap- 

 pears like a long-pointed shelf, but is really formed of 

 the two long interlamellar hairs stuck together at the 

 points, and their whole surface coated, and the trian- 

 gular space between them filled up, with dirt and some 

 dried mucous secretion, which forms a thin translucent 

 plate between the two hairs ; the projection stands 

 quite free in air, except at its proximal edge, and ends 

 in a long, turned-up, blunt point or knob, where the 

 two hairs are stuck together. This is the condition in 

 which it is drawn (PI. XL VII, fig. 3). 



The cephalothorax behind the rostrum is divided 

 into two rolls or divisions, the anterior considerably 

 the narrower, and bearing the pseudo-stigmata ; the 

 pseudo-stigmatic organs resemble those of the adult. 



Legs thick and straight, the hind pair considerably 

 shorter than the body ; the femora are very rough and 

 marked with ridges and little rugosities. There are 

 one or more whorls of short, thick, sharply-curved hairs 

 on each joint of the legs. The usual tactile hair on 

 each front tibia, and fine hairs on the tarsi. 



Abdomen oblong, the sides being parallel, and the 



