214 AMERICAN COLEOPTEKA. 



Subdepressed, very elongate; thorax one-half wider than long, slightly nar- 

 rower at base than apex; elytra slightly wider than the thorax, sub- 

 parallel. Length .10-. 13 inch ... lsetultis Lee- 



21. T. sellatus Lee. — Form slender, elongate, convex. Color rufo-testa- 

 ceous, subopaque, the elytra with a large, common, more or less (dearly defined 

 discal spot fuscous or pieeous. Head scarcely as wide as the thorax; frontal 

 grooves distinct, extending backwards to the hind margin of the eye ; eyes large, 

 prominent; antenna? about one-half the length of the body, ferrugineous, the 

 outer joints scarcely darker; palpi rufo-testaceous. Prothorax subcordate, 

 nearly as long as wide, widest in front of the middle, very distinctly narrower at 

 base than apex ; apex slightly emarginate, the anterior angles slightly prominent 

 and acute; anterior transverse impression obsolete, the posterior rather feeble; 

 median line distinct, entire; basal impressions distinct, linear; base truncate; 

 sides broadly margined, arcuate in front, oblique behind, distinctly sinuate in 

 front of the hind angles, which are rectangular, not carinate. Elytra more than 

 one-half wider than the thorax, oblong oval, broadly margined, elongate, with 

 six deep dorsal striae ; stride deeply punctate, subentire. the fifth slightly grooved 

 at tip ; intervals convex, the third with the first dorsal puncture about one-fourth 

 from base, the second about the middle. Body beneath rufo-piceous, the abdo- 

 men slightly paler. Legs rufo-testaceous. Length . 13-. 16 inch ; 3.25 4 mm. 



Very distinct from the others of the group. 



The discal spot on the elytra is subject to some variation. It is 

 usually margined posteriorly and sometimes also anteriorly with 

 pieeous, and is often not clearly defined. In most specimens exam- 

 ined the suture is also infuscate. 



Occurs in Arizona and at Yuma, Cal. 



22. T. e|>lii|»|>istt u* Say. — Form slender, elongate, convex. Color rufo- 

 testaceous, shining, the elytra with a large, common discal spot and sometimes 

 with a subbasal one varying from rufo-piceous to nearly black. Head scarcely 

 narrower than the thorax; frontal grooves distinct, extending posteriorly to the 

 hind margin of the eye; eyes large, prominent; antennae less than one-half as 

 long as the body, rufo-testaceous, the outer joints scarcely darker ; palpi testaceous. 

 Prothorax subcordate, slightly wider than long, narrower at base than apex ; 

 apex nearly truncate, the anterior angles not prominent ; anterior transverse im- 

 pression feeble or obsolete, the posterior deep, punctate and slightly rugose ; 

 median line fine, abbreviated at each end: basal impressions small ; base trun- 

 cate; sides with the margiu very narrowly reflexed, arcuate in front, sinuate 

 behind; hind angles rectangular, not carinate. Elytra elongate, oblong-oval, 

 about one-half wider than the thorax, less widely margined than in selhttits. with 

 six moderately deep dorsal striae ; striae distinctly punctate, somewhat less deeply 

 towards the tip, subentire, the fifth deeply grooved at apex; intervals feebly 

 convex, the third with the first dorsal puncture about one-fourth from base, the 

 second slightly behind the middle. Body beneath rufous or rufo-piceous. Legs 

 testaceous. Length .10-.13 inch ; 2.5-3.25 mm. 



Readily distinguishable from the other two species of the group 

 by the characters given above. The extent and depth of color of 



