254 UNIVERSITY OF COLORADO STUDIES 



Family DRASSID^ 

 Elongate spiders with low cephalothorax; legs usually rather long, strong, and 

 tapering, terminated by two pectinate claws, armed with spines, and scopulate; 

 the body is smooth or short-haired and frequently unicolorous or sombre-colored, 

 seldom ornate; the eyes, normally eight, are in two transverse rows (Warburton). 

 Commonly found under stones. 



(108) Zelotes Gistl. Z. atra (Hentz).* University campus. 



(109) Gnaphosa Latreille. G. gigantea Keyserling, Eldora, August, 1910. An 

 undetermined species in Boulder Canon, 7,340 ft. 



(no) Callilepis Westring. C.imbecilla Keyserling. Salina, April 14, 1907. 

 (in) Drassus Walckenaer. D. coloradensis Emerton. Salina, April 14, 1907. 

 The type-locality is Gray's Peak. 



Family CLUBIONIDiE 

 Subfamily CLUBIONIN^ 

 Allied to Drassidae; anterior spinnerets close together, and eyes more extended 

 across the head; abdomen often more cylindrical. 



(112) Phrurolithus Koch. P. formica Banks. Boulder, March, 1910, in nests of 

 the ant Cremastogaster (W and T. Cockerell). Specimens were sent to Dr. W. M. 

 WTieeler, who noted that whereas the typical P. formica of the Eastern States is 

 entirely black like the Cremastogaster with which it lives, the Boulder form has the 

 cephalothorax red, corresponding to the accompanying Cremastogaster. Our 

 specimens were also examined by Mr. J. H. Emerton, who agreed that they were 

 P. formica, nearer to a variety found at Tyngsboro, Mass., than to the typical form, 

 which occurs at Forest Hills. 



(113) Clubiona Latreille.* An undetermined species on University campus. 



Subfamily MICARIINiE 

 A group containing ant-like forms. 



(114) Micaria Westring. J/, ^er/ec/a Banks.* University campus; If. coloradensis 



Banks, Boulder. 



Family DICTYNID^ 



With a cribellum or sieve-like plate in front of the spinnerets in female; eyes nor- 

 mally eight; legs rather strong; tarsi three-clawed and devoid of scopula (tuft 

 of club-Uke hairs). Making irregular webs. 



(115) Dictyna Sundevall. D. arundinaceoides KtysexWng, Eldora, 1910. 

 D. siiblata Hentz,* University campus. 



(116) Titanoeca Thorell. T. americana Emerton. Salina, April 14, 1907; Boulder 

 Canon, 7,340 ft., September, 1907. This spider, according to Emerton, is a quarter 

 of an inch long, deep black except the cephalothorax, which is dull orange, but 

 covered with long black hairs like the rest of the body. Some have a few light- 

 grey spots on abdomen. It lives under stones in dry places. 



Family THERIDIIDiE 



Sedentary spiders, usually with feeble chelicerse (mandibles) and relatively large 

 abdomen; snare irregular (Warburton). There is a comb on the hind tarsus, and 

 the legs are usually without spines. 



