112 AMERICAN COLEOPTERA. 



which is Went toward and is nearly in contact with its fellow at tip. 

 The suture is not distinctly elevated. 



I), iiiigiilivolliw Horn. — Very similar to carolinensis. The sides of the 

 thorax are a trifle more sharply angulate ; the intercostal spaces are more regu- 

 larly triseriately punctate (the interval between the suture and the first oosta 

 bears only two series of punctures in both species), the intermediate line of punc- 

 tures being litre nearly as regular and as closely placed as the other two. The 

 elytra are more oval, the humeri being more broadly rounded and the sides less 

 parallel at the middle. The elytra, as well as the prothorax, are provided in 

 fresh specimens with a membranous border, in which the marginal cilise may be 

 seen by transmitted light. The mesosternum is not distinctly carinate on the 

 median line. The females lack the peculiar processes of the sutural costie noted 

 in the preceding species. Length 1.75 mm. 



Ha b. — California. The only specimens that I have seen with 

 exact locality label were collected by Dr. Fenyes at Monterey. 



I>. grouvellei Belon is described from the Mariposa region of Cali- 

 fornia. The characters given do not seem to me sufficient lor its 

 separation, in fact they are for the most part based on a misappre- 

 hension of angulicollis, which Belon had not seen. I have there- 

 fore followed Dr. Horn in regarding it as a synonym of angulicollis. 



Tribe III. Latiikidiini. 



The more important characters of this tribe are : Epistoma (except 

 very rarely ), wider than the labium, and on a somewhat lower plane 

 than the front, from which it is separated by a strongly marked 

 suture. Front more or less coarsely or rugosely sculptured, often 

 silicate or carinate. Antenna? 11 -jointed (except in some Metoph- 

 thalmus), club 2 or 3-jointed. Prothorax with pronounced sculp- 

 ture, often costate and variously foveate or impressed; side margins 

 without denticles, properly speaking, but often lightly crenulate. 

 Elytra each 6-8 punctate-striate (except Revelieria), intervals fre- 

 quently in part more strongly elevated or even carinate. Anterior 

 coxal cavities closed behind and separated by a prosternal lamina, 

 which (except in Adistemia) is distinctly visible. Middle coxae 

 more widely separated than the anterior, except in Adistemia. 

 Abdomen composed of five segments in both sexes. In form of 

 body, details of sculpture and coloration there is great diversity. 

 The vast majority of species are glabrous or subglabrous, the only 

 notable exceptions being Lath rid in* productus and Enicmus Iiirtus, 

 both of which are thus far of very rare occurrence in this country. 



