ARACHNIDA 57 



Family DYSDERID^. 

 ARIADNE TARSALIS sp. nov. 



(PI. I, fig. 9.) 

 Length 8 mm. 



Cephalothorax yellowish brown, scarcely darker in eye-region, side 

 margin black; mandibles dark red-brown, almost black at tips; 

 sternum and legs yellowish, metatarsi and tarsi of anterior pairs dark 

 brown, metatarsus I nearly blackish at tips ; abdomen dark gray 

 above, slightly paler beneath; spinnerets pale. General structure as 

 usual ; tibiae I and II with four pairs of stout spines beneath ; meta- 

 tarsi I and II with nine pairs of spines beneath ; a few spines on tibia 

 and metatarsus III; no spines on leg IV except small one under base 

 and one at tip of metatarsus. 



A few specimens from Culpepper Island, December. 



This is not the Segestria ceguatoria of Marx, which is a genuine 

 Segestria of usual appearance ; herring-bone mark on back, and 

 banded legs. 



Family DRASSID^. 



PROSTHESIMA GALAPAGOENSIS sp. nov. 



(PI. II, fig. 7.) 

 Length 5 mm. 



Cephalothorax uniform yellowish brown, margins black; mandibles 

 more red-brown; legs and sternum more yellowish; abdomen grayish 

 brown, paler beneath. Posterior eye-row slightly procurved, the P. 

 M. E. oval and touching at hind angles, about their short diameter 

 from the equal P. S. E. ; quadrangle of M. E. once and one-half 

 higher than broad, broadest in front : anterior eye-row plainly pro- 

 cui-ved, A. M. E. rather larger than P. M. E., less than their diameter 

 apart, and still closer to the equal A. S. E. Sternum but little longer 

 than broad, broad in front, but little wider in middle, pointed be- 

 hind between the hind coxae. Legs moderately slender, no spines 

 under tibiae I and II, one at base and one near tip under metatarsi I 

 and II, many on hind pairs, some above. Abdomen one and three- 

 fourths times as long as broad, but little depressed, and not much 

 widened in the middle, truncate at base, pointed behind. 



One female from Albemarle taken at sea level near Iguana Cove in 

 June. 



PCECILOCHROA BIFASCIATA sp. nov. 



(PI. I, fig. 4.) 

 Length 5.5 mm. 



Cephalothorax and legs shining yellowish brown ; the mandibles 



and sternum more reddish brown; eyes on black spots; abdomen pale 



