40 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Anethops oocidentalis gen. et spec, no v. 



Brown or fulvous brown, the feet paler; head punctate with 

 moderately small punctae, suboval, the posterior margin rounded; 

 basal j)late exposed ; doi'sal scuta lightly punctate, impressed with 

 two deep marginal sulci, and upon the middle portion with six 

 sulci, the two outermost and the two innermost indistinct, the inter- 

 mediate ones deep; ventral scuta densely minutely punctate, each 

 plate, excepting the three anterior and the three posterior, with a 

 cruciform impression, the longitudinal sulcus wide and much deeper. 

 Antenn£e rather long, swollen at base, attenuated distally ; articles 

 17, mostly rather short ; densely clothed with short stiff bristles which 

 become very short on the distal joint*. Prosternal margin without 

 teeth or spines, glabrous; coxal tooth small, black, acute. Legs 

 sparsely aculeate distally ; the first tarsal joint, excepting in the last 

 pair, armed beneath with one spine and above with two, the second 

 tarsal joint armed beneath with a spine, claws of all legs armed at 

 base with two spines, tibise not armed. Anal legs scarcely swollen, 

 not shortened, the third and the fourth joints not armed with teeth 

 or spines. Last ventral plate wide, covering the pleurae laterally, 

 scarcely converging caudad, the posterior border widely sinuate; 

 last pleurae narrow, wuth conspicuous processes posteriorly, each 

 ending in a stout, acute black point. 



Length 33.5 mm., width 3 mm. ; length of antennae not quite 

 7 mm. 



Habitat. — San Gabriel Canyon, Los Angeles county, Cal. 



The type specimens were collected May 25, 1901, by Mr. Charles 

 E. Hutchinson. 



Etymology. — Genus: Greek «, privative, fyfloo, character, and 

 &(}', eye. 



Key to American Species of Theatops. 



Oj. — Femora of anal legs unarmed; none of the tibial or tarsal 

 joints armed above ; all tarsal joints armed beneath except 

 the last two ; processes of last pleurae unarmed with spines, 



posticus (Bay). 1. 



ttj. — Femora of anal legs armed with one or two spines at the supe- 

 rior interior angle ; tibiae, except the last three, armed above ; 

 tarsal joints, except in last two pairs, armed above and be- 

 neath (first tarsal joint of first legs not armed beneath) ; 

 processes of last i)leurte unarmed with spines, 



spmicaudns (Wood). 2, 



