298 PROCEEDINGS OF THE ACADEMY OF [May, 



Length of leg I, 3.6 mm. ; tib. + pat., 1.3 mm. ; met., 9 mm. 



Length of leg II, 3.4 mm. 



Length of leg III, 3.3 mm. 



Length of leg IV, 4.8 mm.; tib. + pat., L5 mm.; met., 1.5 mm. 



Syn.— 1890. Aulonia aurantiaca, Marx, Proc. U. S. N. M., 12. 



1892. Aulonia aurantiaca, Marx, Proc. Ent. Soc. W., 2. 



1892. Aulonia aurantiaca, Banks Proc. Acad. Nat. Sci. Phila., 44, p. 73. 



1898. Trabea aurantiaca, Simon, Hist. Nat. Araign., 2. 



Type locality. — Massachusetts and Connecticut. 

 Known localities. — Massachusetts !, Connecticut, New York, District 

 of Columbia!. 



The genus SOSILAUS Simon, 1898. 

 (Hist. Nat. d. Arai^., Vol. 2, p. 350.) 



" Cephalothorax convex behind, in front long slanting and attenu- 

 ated, the face rather narrow, oblique and obtuse. Four anterior 

 eyes subcontiguous, in a gently recurved row, the median at least 

 twice as large as the lateral. Eyes of the second row moderate, approx- 

 imate, occupying a transverse space much narrower than the anterior 

 eye row (PI. XII, figs. 5, 6). Chelicerse rather weak, the inferior 

 margin of the furrow tridentate, liabium longer than wide, attenuated 

 and obtuse. Legs rather long; the metatarsi and tarsi slender and 

 long, not scopulate; anterior tibiie armed beneath with 5-5 prone 

 spines and the metatarsi with 3-3 similar ones, there being smaller 

 lateral spines" (Simon). 



In the character of cephalothorax and eyes this genus is very similar 

 to Tricca and similarly much suggests Allocosa, from which it differs 

 most conspicuously in the armature of the anterior tibiae. The 

 posterior eyes are situated upon a very oblique plane. The eyes of the 

 second row are relatively small. 



But one species of this genus is known and that by a single specimen 

 {S. spingerE. S.). 



Syn. — 1903. Sosilaus Comstock, Classification of North American Spiders. 



Sosilaus spiniger Simon, 1898. 



(Hist. Nat. Araign., 2, p. 350.) 

 "Length of male 3.7 mm.— Cephalothorax fulvo-rufous, smooth 

 and subglabrous, a narrow marginal fuscous line and the pars thoracica 

 marked irregularly with short radiating stripes. Abdomen fusco- 

 testaceous, paler in front and below. Legs lurid, tarsi infuscated. 

 Palpi lurid, the tarsus infuscated, sides parallel, setose with long 



