AMERICAN COMPONENTS OF THE TENTYRIIN^ 43 1 



coarsely, sparsely but conspicuously punctured. Length 6.2 mm. ; 

 width 2.7 mm. Texas ovipennis Horn 



Form nearly similar though a little stouter and less parallel, darker, 

 blackish-piceous, the legs pale rufous, shining, the elytra with 

 feeble metallic lustre ; pubescence nearly as in ovipennis but still 

 shorter and less evident ; head coarsely, rather closely perforato- 

 punctate, with a small vertexal impunctate spot as in ovipe7i7iis^ 

 but with the punctures of the anterior part of the head coarser, 

 more clearly perforate and more separated ; prothorax twice as 

 wide as the head, nearly as in ovipennis in form and sculpture; 

 scutellum very small, rounded; elytra as in ovipennis but broader 

 and, before the middle, fully a fifth wider than the prothorax, the 

 humeri more transversely exposed at base and the punctures 

 coarser, sparser and devoid of serial arrangement, fine along the 

 elytral suture and scarcely so coarse at the sides as elsewhere; 

 abdomen not very coarsely, sparsely punctate, very coarsely so on 

 the first segment, this character being much more evident than in 

 ovipennis. Length 6.6 mm. ; width 2.92 mm. Texas. 



estriatus n. sp. 



These species are rather closely allied but the differences in 

 color, sculpture of the anterior parts of the head, and of the 

 entire elytra and basal part of the abdomen and relatively more 

 inflated elytra, with more exposed humeral angles as detailed 

 above, are so evident that there ought to be but little doubt in 

 identifying them. The complete absence of the humeral callus 

 distinguishes this genus from any other of the tribe in our 

 fauna, and the general aspect, shorter elytra and more abbrevi- 

 ated metasternum, indicate a curtailment of the wings, a very 

 exceptional character in the present tribe though probably 

 occurring in Tydeoliis also. 



Tribe Triorophini. 

 The various genera of this tribe were assigned to a much 

 more heterogeneous tribe Gnathosiini by Horn, but there are 

 several characters pertaining to the American genera, such as 

 general facies and sculpture, antennal structure and form of the 

 scutellum, that indicate the very decided propriety of separating 

 them as a distinct tribal group, having much more affinity with 

 the purely North American Eurymetoponini, by way of the 

 similarly geographically restricted Trimytini, than it has to the 

 old world Gnathosiini, composed of such genera as Gnathosia, 

 Pac/iyc/iila, Anatolica, Tcntyria, Microdera and many others. 



