196 bulletin: museum of comparative zoology. 



ARANEIDA. 



AVICULARIIDAE. 



Hemirrhagus peruvianus, sp. nov. 

 Plate 6, fig. 4-10; Plate 7, fig. 1-2. 



Integument of carapace, chelicerae, femora of legs and palpi, 

 sternum and labium dark chocolate-brown, the other parts of legs 

 and palpi lighter brown, in part of dilute reddish tinge; sternum and 

 femora of legs beneath sometimes lighter than above. Integument 

 of abdomen brown, paler beneath than al:)ove; above with a small 

 light area toward anterior end. Carapace covered with a woolly coat 

 of russet-brown hair of a more or less coppery lustre, and some longer 

 grey ones at caudal edge especially. The legs are thickly clothed 

 with short brownish hairs with deep black ones more sparsely inter- 

 mixed; the numerous longer bristles are dark proximally, becoming 

 grey, grey or white distad, these forming rather indistinct longitudi- 

 nal streaks on the femora and patellae. Abdomen densely clothed 

 with brown hair of a distinctly coppery lustre, that of anterior surface 

 black and forming a distinct black area; longer bristles of dorsal 

 surface grey distally; sometimes dark hairs form a larger element on 

 the ventral surface and this sm-face then appears dark grey or blackish 

 instead of copper-brown as more usual. Fringes of endites and cheli- 

 cerae orange proximally, lighter distad. 



Eye-tubercle sharply limited; of moderate height. Eye-area less 

 than twice as wide as long in both male and female (67 : 37) ; rows 

 subequal or the posterior one slightly longer than the anterior (up to 

 ratio 67:65). Anterior row of eyes in dorsal view a little procurved; 

 in anterior view rather strongly procurved. Anterior median eyes 

 with diameter not much more than half that of the laterals {cir. 6:11), 

 a little more than their radius apart, but decidedly less than their 

 radius from the laterals. Posterior row of eyes conspicuously' re- 

 curved. Posterior laterals smaller than the anterior laterals from 

 which separated by less than their radius. Posterior medians three 

 fourths the diameter of the laterals ; mesal side more curved than the 

 ectal, more or less angulate anteroectally, (Plate 6, fig. 4). 



Head low, only slightly rising in front of the thoracic groove; 



