NORTH AMERICAN COLEOPTERA, 287 



doubt as to the determination of my specimens, of wliich I have 

 examined over twenty. 



D. discolor Aube. Pis. 5, 6. figs. 11, lla and 116. — Size nioderately large, 

 oblong oval, somewhat convex, narrowed in front; surface metallic shining, very 

 I'arely black, punctures and strife quite distinct; lateral margins of elytra at ex- 

 terior apical angles and apices, sinuate; depressions very feeble, sutui-al angles 

 weakly produced ; under surface and legs testaceous to straw color ; anterior tibi?e 

 cylindrical at basal portion and gradually broadened to apex ; apex slightly ob- 

 lique, exterior angle rectangular, produced ; femora with a fairly strong trian- 

 gular tooth, setigerous punctures (fi "^ , 7 9 ) ""t deep or closely placed. Length 

 10.5-13 mm. ; breadth 6-7 mm. 



Hah. — North and Middle Atlantic States ; North and South 

 Carolina, Mexico. 



It is rather remarkable that the femoi-al tooth of the male in this 

 species has been so long overlooked. This is probably due to the 

 generally light color of the under surface and legs, and to the habit 

 of the species of Dineutes of folding the legs close to the body. 

 Unless the legs are extended the tooth is concealed. 



D. august us Lee. Pis. 5, 6, figs. 12, 12a and 126. — Size small, narrowly 

 ovate, strongly convex, narrowed in front; surface black polished, strise usually 

 entirely obliterated, at most very faint, punctures evident; lateral margins not 

 sinuate, depressions at suture wanting, at exterior apical angles distinct; sutural 

 angles somewhat produced ; entire under surface and legs rufous; anterior tibiae 

 cylindrical at basal portion and gradually broadened to apex ; apex strongly ob- 

 lique, exterior apical angles acute and sharply produced ; femora with a minute 

 tooth, setigerous punctures (4 'J, , 5 9) shallow and well separated. Length 9- 

 10..5 mm. ; breadth 4.5-5.5 mm. 



Hah. — Virginia, Florida. 



This species is closely related to discolor, but I am convinced it is 

 a distinct species. It is smaller, the largest specimens I have seen 

 being ho larger than the smallest discolor, is narrowly ovate, not so 

 abruptly narrowed in front and more strongly convex. In angustiis 

 the surface is polished black, in discolor metallic shining ; in angustus 

 the striae are usually obliterated, never more than very faint ; in 

 discolor they are distinct ; in angustus the lateral margins at exterior 

 apical angles are not sinuate, while in discolor they are evidently, 

 though not strongly so. There is one less j)uncture on the femora 

 in angustus, and they are more widely separated. While color is 

 not usually a very reliable character, it is sometimes of importance, 

 and in discolor I have never seen the entire under surface and legs 

 of a rufous color, which is constant in angustus. The male genitalia 

 are very close, being slightly more slender in angustus. 



TEANS. AM. ENT. SOC. XXII. AUGUST. 1895. 



