278 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se«. 



Described from ten males and seven females. I have taken 

 this species at Mussey's in San Diego County, Palm Springs, 

 May 18 to 23, and Keen Camp in the San Jacinto Mountains, 

 Calif., June 6, to 12, 1917, and have examples in my collection 

 from El Paso, Texas, taken April 5, 1902; Alamogordo, N. 

 Mex., taken June 9, 1902, and Bill Williams' Fork, Ariz., taken 

 by Prof. F. H. Snow in August. At Palm Springs it was taken 

 with its young on Hymcnoclea salsola T. &. G. The short buc- 

 culae and narrow pronotal margins will distinguish this species. 

 These carinate margins are at times more or less crenulate but 

 not strongly as in affims and its allies. 



Holotype (No. 392), male, and allotype (No. 393), female, 

 from Palm Springs in collection of the California Academy of 

 Sciences. 



Paratypes in collection of the California Academy of Sciences 

 and in that of the author. 



The North American species known to me may be distin- 

 guished as follows : 



Lateral margins of pronotum distinctly serrated aMnis Dall. 



Lateral margins of pronotum obscurely granulated or smooth 1 



1. Lateral margins of pronotum carinated but not reflexed; bucculae 



attaining anterior margin of eyes an^ustatus, new species 



-. Lateral margins of pronotum broadly expanded and reflexed 2 



2. Color croceus or reddish ; rostrum short ; base of vertex without a 



groove croceus Gibson 



-. Color more yellowish or testaceous ; base of vertex with a median 



groove 3 



3. Basal segment of antennae scarcely surpassing clypeus ; bucculae not 



surpassing anterior line of eyes ; membrane bivittate 



fraterculus Say. 



-. Basal segment of antennae much surpassing clypeus ; bucculae attaining 

 hind margin of eyes; membrane without vittae reiiexulus Say. 



8. Teleonemia vidua, new species 



Closely allied to nigrina, proportionately a little longer with 

 more slender antennae; color a uniform dark fuscous with the 

 head and basal segment of the antennae black. Length 4 mm. 



Elongate, narrow; elytra nearly parallel, a little expanded at the middle. 

 Vertex with two short porrect frontal spines, the anterior just above the 

 line connecting the base of the antennae, the posterior continuing the 

 superior line of the vertex. Antennae longer and more slender than in 

 nigrina, clothed with very short hairs; segments one and two sub-equal; 

 four scarcely as long as one and two together, fusiform with cinerous 

 pubescence at apex ; three nearly three times the length of four. Pronotum 

 less convex than in nigrina with posterior scutellar portion longer, the 

 anterior margin not elevated nor produced medially ; carinae feeble ; surface 



