436 BRITISH OKIBATlDiE. 



The creature is very like D. geniculatus, but easily 

 distinguished from it by the small, fine, hooked hairs 

 on the notogaster, instead of the great, nearly straight, 

 stiff spines of that species. 



Colour very dark brown or black; legs a trifle 

 lighter. 



Texture dull, very slightly rough ; the whole of the 

 remarks found under the head "texture" in the 

 description of the adult D. geniculatus (p. 431) will 

 apply to the present species equally well ; all specimens 

 of D. aurit'us which I have seen carry some portions, or 

 the whole, of their cast nymphal skins in addition to 

 dirt. 



Cephalothorax distinctly divided into three divisions 

 by transverse furrows or constrictions. The anterior 

 division is considerably the narrowest ; it forms the ros- 

 trum, and is conical, with a slightly rounded apex ; but 

 the lower edge (epistome) of the antero-lateral portion 

 slightly projects. There is a pair of small, curved, 

 rostral hairs, and a considerably larger pair on the 

 dorsal surface of the rostrum. The central division 

 has a projecting and raised chitinous boss on each 

 side, to the outer hind edge of which the first leg is 

 articulated, and which has a projecting, slightly bifid 

 corner anteriorly. There is a curved ridge near the 

 inner side of each boss, and four straighter ridges 

 between them separated by furrows ; these markings 

 are not always very clear. The posterior division has 

 four similar ridges ; all the ridges are often indistinct. 

 The pseudo-stigmata are placed near the anterior 

 margin of this division on the tops of mammiform 

 elevations; they are very projecting, with open trumpet- 

 shaped mouths, and are strongly ridged inside. Pseudo- 

 stigmatic organs filiform^ slightly thickened towards 

 their proximal ends, long, almost straight. Inter- 

 lamellar hairs thick, sharply curved, set close to the 

 inner anterior edges of the projections which carry the 

 pseudo-stigmata ; there is a smaller similar hair on each 

 side outside the pseudo-stigma. At each side of this 



