220 AMERICAN COLEOPTERA. 



flattened; an ten nee about one-balf as long as the body, testaceous ; palpi testa- 

 ceous. Prothorax subquadrate, nearly one-half wider than long, distinctly nar- 

 rower at base than apex; apex truncate; anterior transverse impression obsolete, 

 the posterior distinct; median line fine, abbreviated at each end; basal impres- 

 sions small, moderately deep; base truncate; sides with the margin narrowly 

 reflexed, arcuate in front, sinuate behind ; hind angles rectangular, not carinate. 

 Elytra scarcely wider than the thorax, subparallel, with the first, second and 

 third striae feebly impressed or nearly obsolete, the recurved portion of the 

 sutural slightly oblique and very strongly hooked at tip; first dorsal puncture 

 about the middle, the second at the tip of the recurved portion of the sutural 

 stria. Body beneath and legs testaceous. Length . 08-. 10 inch ; 2-2.5 mm. 



Distinct from the others of the group hy the smaller and less 

 prominent eyes. 



Tt was described by LeConte from the Valley of the Colorado 

 River. Other specimens have been seen from California, Arizona 

 and Salt Lake Valley, Utah. 



28. T. virgO Lee. Form elongate, depressed. Head piceous or nearly black, 

 prothorax piceous or rufopiceous, elytra very pale testaceous, with the suture and 

 an ill-defined discal spot more or less infuscate. Head large, scarcely narrower 

 than the thorax ; frontal grooves extending posteriorly to the middle of the eye; 

 eyes large, prominent ; antenme scarcely one-half as long as the body, testaceous, 

 the outer joints slightly fuscous; palpi testaceous. Prothorax slightly wider than 

 long, narrower at base than apex, subquadrate; apex truncate; median line very 

 fine, abbreviated at each end ; anterior transverse impression obsolete, the poste- 

 rior distinct; basal impressions very small ; base truncate; sides with the margin 

 very narrowly reflexed, slight I y rounded in front, sinuate behind; hind angles 

 rectangular, not carinate. Elytra slightly wider than the thorax, elongate, sub- 

 parallel, very finely striate, the two inner stria; deeper, the third and fourth 

 nearly obsolete, the other dorsal st rue wanting; first dorsal puncture about the 

 middle, the second at tip of the recurved portion of the sutural stria ; intervals 

 nearly flat. Body beneath piceous. Legs testaceous. Length .09-.10 inch ; 

 2.25 2.5 mm. 



Resembles most closely pallidus Chaud., but the thorax is more 

 narrowed behind and the color of the head and thorax darker. The 

 form is also more elongate, the thorax longer as compared with its 

 width and the elytra narrower as compared with the thorax. 



Known to me only from California. 



29. T. pallidus Chaud. — Form elongate, depressed. Color pale yellowish- 

 testaceous, the head and thorax slightly darker than the elytra, the latter more 

 or less translucent. Head as wide as the thorax at apex; frontal grooves not 

 deeply impressed, extending posteriorly to the middle, of the eye ; eyes large and 

 prominent; antenme less than one-half the length of the body, testaceous; palpi 

 testaceous. Prothorax about one-half wider than long, subquadrate, slightly 

 narrower at base than apex; apex nearly truncate . ; anterior transverse impres- 

 sion obsolete or nearly so; median line very fiue, abbreviated at each end ; poste- 



