256 UNIVERSITY OF COLORADO STUDIES 



(127) Tibellus Simon. Peculiar for the very long abdomen, which makes it look 

 very different from the ordinary crab-spiders. T. oblongns Walckenaer,* Uni- 

 versity campus and Eldora. 



(128) Philodromus Walckenaer. P. alaskensis Keyserling,* University campus. 



Family LYCOSID^ 

 Wandering hunters, known as "wolf-spiders," in the breeding season carrying their 

 egg-bags \vith them, attached beneath the abdomen. Eyes in three rows; tarsi 

 three-clawed; no spur at tip of tibia of male palpus. 



(129) Lycosa Latreille. L. carolinensis Walckenaer,* female reaching a length of 

 over 25 mm., mouse-color above, largely black beneath; L. brunneiventris Banks,* 

 female 12 mm., sternum and coxae dark brown, under side of abdomen pale brown, 

 femora not ringed. Both on University campus. 



(130) Pardosa Koch. P. sternalis (Thorell),* University campus; P. iracunda 

 (Thorell), Boulder Canon, 7,340 ft. The species of Pardosa are smaller than 

 Lycosa, the head with more vertical sides. 



(131) Trochosa Koch. Third and fourth tibiae without a spine at base above, 

 though there is one near middle (in Lycosa and Pardosa these tibiae have a stout 

 basal spine). T. cinerea (Fabricius),* University campus. 



Family ATTIDiE 

 The "jumping spiders," with three rows of eyes, the first consisting of four large 

 eyes directed forward; eyes of second row very small; legs relatively short. Often 

 bright-colored or prettily marked. 



(132) Phidippus Koch. P. opifex McCook, Boulder (cf. Peckham, Revis. Attida 

 N. Am., 1909, p. 393); P. aiidax Hentz ==morsUans Walck., Peckham,* Univer- 

 sity campus and Boulder Canon, 7,340 ft. P. ardens Peck., Boulder; P. mon- 

 ticolus Banks, Boulder. Also an undetermined species at Eldora. P. atidax is 

 the common species with white spots on the abdomen. 



(133) Pellenes Simon.* Undetermined species were taken on the University 

 campus, and at Salina and Eldora. 



(134) Salticus Latreille.* S. scenicus Clerck, Boulder. An undetermined species is 

 common on the University campus. 



The Attidae are numerous in Boulder County, and would well repay study. Banks, 

 in his catalogue of Colorado spiders (Annals N.Y. Acad. Set., 1895), records 19 

 species from the state, eleven being reported from Fort ColUns. Since then other 

 species have been found, as Pellenes klauseri Peckham at Denver and Fort Collins, 

 and P. birgei Peckham at Canon City. At Steamboat Springs, May 27, 1910, 

 I took the following (det. Banks) : Pellenes cockerelli Banks, P. festus Peckham, 

 Deyidryphanles vilis Cockerell, Attus palustris Emerton. P. cockerelli was 

 originally described from an altitude of 11,000 ft. in New Mexico, and D. vitis 

 from 3,800 ft., also in New Mexico. It is rather remarkable to find them occur- 

 ring in the same locahty in Colorado, at an altitude of 6,780 ft. (The other 

 Arachnids taken on the same day at Steamboat Springs were Trombidium seri- 

 ceum Say, Tetragnatha laboriosa Hentz, Lithyphanles corollatus [LinnS], Micaria 

 perfecta Banks, and Pardosa sp.) 



