NOTHRUS BICARINATUS. 615 



hairs diverging. At the anterior edge of the dorso- 

 vertex are two large chitinous apophyses, convex on 

 their outer, slightly concave at their inner edges ; thick 

 at their proximal, and more cylindrical at their distal 

 ends, which reach beyond the tip of the rostrum ; each 

 of these apophyses bears a large stout hair, thickly set 

 with short villous processes ; these hairs are straight 

 at first, but curve inward at their distal ends, 

 and generally cross. Pseudo-stigmata very pro- 

 jecting, not close to the progaster. Pseudo-stigmatic 

 organs very short, but scarcely as short as those of 

 N. horriclus ; with thin peduncles, varying a trifle in 

 length in different specimens, and small, shortly pyri- 

 form, almost globular heads, rough at the ends. 

 There are two slight longitudinal ridges nearer the 

 median line than the pseudo-stigmata ; these ridges 

 may be almost straight or may be more loop-like. 

 Interlamellar hairs very long and setiform ; in perfect 

 clean specimens they have fine whip-like ends which 

 reach beyond the tip of the rostrum ; they s'pring from 

 small hilt distinct chitinous apophyses a little anterior 

 to, and nearer the median line than, the pseudo-stigmata. 

 Legs of moderate length, the fourth pair about 

 reaching, or very slightly passing, the hind margin ; 

 thick, rough, gradually diminishing in thickness, but 

 each joint is slightly enlarged at the distal end. The 

 legs are furnished with short, rough, curved, almost 

 hooked hairs ; each springs from an apophysis, but 

 these apophyses are smaller and less distinct, and the 

 hairs less broad than those of N. horriclus ; they are 

 arranged about as follows : — Two or more on the out- 

 side of each femur, and two on the inside of each of 

 those of the first and second pairs, one or two on the 

 outside of each genual, and one on the inside of each 

 of these joints of the first and second pairs, four or five 

 on each side of each tarsus, four large and closely set 

 on the outside of the third coxa, and one on the upper 

 surface of each joint ; the tarsi have the usual fine 

 hairs. Claws tridactyle, almost homodactyle. 



