504 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Length of body somewhat more than 6, of cephalothorax nearly 2^ 

 millim. ; breadth of cephalothorax 2i millim.; length of abdomen 4^, 

 breadth of same 3 millim. Length of legs: 1 10, II 11^, III 9, IV little 

 more than 9 millim. ; patella + tibia II somewhat more than 4, patella 

 tibia + IV 31 millim. 



A single adult female was captured at Kelso Cabin, Colo., July 6. 



Section CITIGRADiE. 



Fam. LYCOSOID.E. 



Gen. Lycosa Latr., 1804.* 

 20. L. sternalis n. 



Cephalothorax brownish-black, with three narrow bands, the middle 

 one only reaching to the pars cephalica, the lateral bands supramarginal, 

 continuous, and uneven in the margins; sternum yellowish, with a large, 

 middle, ovate, black patch, geminated by a yellowish line ; legs dusky 

 yellow, paler at the base, with blackish rings, the second and third pairs 

 of equal length ; back of the abdomen browiish-black, with a shortish, 

 lanceolate, middle band in front, and a row of small whitish spots on 

 each side behind ; vulva consisting of a nearly inversely-ovate corneous 

 area, having tw^o large circular fovete rather close together at its hind 

 extremity and two fine furrows along the middle. — 9. Length 5J-7 

 millim. 



Female. — Cephalothorax much shorter than patella + tibia of the 

 fourth pair, as long as these joints together of the first pair, rather nar- 

 row, not very high in front ; seen in profile, the back is straight, with- 

 out any depression between the posterior declivity and the hindmost 

 eyes, slightly convex and anteriorly somewhat sloping between the 

 four posterior eyes ; the sides of the pars cephalica are, seen from in 

 front, nearly perpendicular, slightly rounded downward. The front 

 row of eyes is much shorter than the middle row, evidently curved 

 downward; the eyes of this row are of equal size, the interval between 



* I fully agree with those who think that when an author has named a certain species 

 as the type of a genus proposed by him, the generic name in question ought to be kept 

 for that species; thus, for instance, the generic name E. piblemum Hentz for Araneus 

 scenicus Clerck or Epibl, faustum Hentz. But Latreille has not, at least not in any work 

 to which I have had access, given any deiinite species as the type of his genus Lycosa; 

 to name one or more species as examples of a genus is not the same as to declare them 

 to be typical species of it. Sundevall, who first broke up Lycosa Latr. into several smaller 

 genera, was therefore free to keep the old name for those species which he considered 

 most typical of the genus, and which indeed by almost all authors are believed to be 

 80. I continue then to take Lycosa in the same sense as Sundevall has done (with L. 

 lugubris Walck. as type), till it has been shown that (and where) Latreille has expressly 

 stated that he considered "L. tarantula" as " <(/2>e" of the genus. As to the generic 

 name Tarentula, vid. Thor., On Eur. Spid., p. 11; id., On the Classif. of Scorpions, in 

 Ann. and Mag. of Nat. Hist., 4th ser., xvii, p. 4, the foot-note. 



