NORTH AMERICAN COLEOPTERA. 93 



thorax, brownish, two basal joints pak^r, third joint distinctly longer than the 

 second. Head rather broadly oval, as wide as the elytra, black, shining, the punc- 

 tuation coarse not dense, front much smoother, usually a large vertical puncture. 

 Thorax narrower than the head, scarcely a fourth longer than wide, the median 

 smooth space distinct, the punctures coarse, deep and numerous, and quite regu- 

 larly placed. Elytra scarcely a fourth wider than the thorax but distinctly longer, 

 punctuation coarse and deep, closely not densely placed, and in some specimens 

 substriate near the suture. Abdomen coarsely not closely punctate. Legs testa- 

 ceous. Length ..34-. 42 inch : 8.5-10.5 mm. 



Male ( Complete form). — Third ventral segment with a very short plica at centre : 

 fourth ventral with a moderately large fovea, the posterior margin prolonged in a 

 rather broad obtuse lobe which does not extend beyond the fifth ventral; last ven- 

 tral entire (PI. 1, fig. 15). 



Male {Incomplete form). — Third ventral plicate, fourth with a fovea, the poste- 

 rior margin of the fourth prolonged in a very short lobe. 



Male {Imperfect form). — Third and fourth ventrals with the plica and fovea as 

 above, the fourth truncate posteriorly without trace of lobe (PI. 1, fig. 16). 



Female. — Ventral segments simple, without plica or fovea. 



In general appearance this species is intermediate between hadium and 

 hicolor. The head is dark as in these two species, and more broadly 

 oval than in hadium, which occupies really an intermediate position in 

 this respect between hicolor and carolinum. The last two abdominal 

 segments are pale as in hicolor., but much less conspicuously so, in fact in 

 some specimens gradually paler to tip. When both sexes are present it 

 may be knowti from either of the above species by the simple abdomen 

 of the female. The male is never as fully developed in its ventral lobe 

 as the above species, but this character cannot be used from the varia- 

 bility of the males of all the species of this series. In the table it is 

 placed next to fexanum, from which it is readily known by its large 

 black head. 



Taken rather abundantly in the District of Columbia by Mr. H. Ulke. 



9. C texaiiuin Lee. — -Pale castaneous, moderately shining, four basal seg- 

 ments alone piceous. Antennaj rufo-testaceous, shorter than the head and thorax, 

 third joint distinctly longer than second. Head oval, hind angles gradually 

 rounded, surface moderately coarsely not closely punctured, front smoother. 

 Thorax narrower than the head, barely a fourth longer than wide, sides nearly 

 parallel, median smooth space well defined, on each side the punctures are coarse 

 and deep, closely placed along the smooth space and at apex, sparsely at the sides 

 and posteriorly. Elytra one-third wider and slightly longer than the thorax, 

 usually with a darker space along the suture widest at base, punctures coarse and 

 deep, a little closer than in bicolor with the spaces between them less elevated. 

 Abdomen rather sparsely finely punctured. Legs rufo-testaceous. Length ..32- 

 .44 inch; 8-11 mm. 



Male ( Complete form). — Third ventral with a short setigerous plica at its centre ; 

 fourth ventral with a large and deep fovea at centre, the posterior margin of the 

 segment prolonged in a lobe as in bicolor; last ventral entire (PI. 1, fig. 20). 



