76 MEMOIRS ON THE COLEOPTERA 



somewhat shining, the head with rather indistinct longitudinal 

 impressions, the pronotum smooth, with the mesial line slightly 

 impressed, a subtriangular impression near the external angle and 

 another transverse medial one near the base, the elytra scarcely 

 striate; 31 mm. long and from Long Island. There is scarcely a 

 single character given that can help us in coming to a conclusion 

 as to its relationships, but it is compared by its author with sub- 

 sulcatus Say, the largest example of which, or of any of the related 

 forms, before me measures only 22 mm. in length. It is given as 

 a variety of sublcevis by LeConte, but the largest example of this 

 or related forms at hand is only about 26 mm. in length, and, while 

 it may occur in Long Island, I have never seen an example from so 

 high a latitude; it would be useless therefore to make further 

 allusion to substriatus Hald. Omitting this I would propose the 

 following arrangement of our numerous species and subspecies: 



Hind body short, generally but very little longer than wide 2 



Hind body always evidently longer than wide 8 



2 Elytra conjointly broadly and obtusely rounded behind; humeral 

 carina very short; hind tibiae with sparse hairs within in both sexes; 



form stout, parallel and very convex 3 



Elytra obliquely and obtusely pointed behind 5 



3 Hind tarsi short, much shorter than the tibiae. Body oblong, convex, 

 rather shining, deep black, the margins very faintly and scarcely 

 visibly violaceous; head about two-thirds as wide as the prothorax, 

 the two impressions distinct, the labrum narrowly trilobed, the 

 middle lobe a little more advanced, rounded and smooth, the lateral 

 obtusely dentiform, the lateral discal impressions deep, the two 

 median diffuse; prothorax two-fifths wider than long, but little nar- 

 rowed at base, the sides broadly rounding to the very obtuse but 

 rather sharp basal angles, just before which there is a very small and 

 feeble sinus, the marginal groove extending fully to and slightly 

 inward from the basal angles; median stria rather strong, the sub- 

 basal impressions moderate; scutellum wholly on the peduncle of 

 the hind body, as usual in the genus; elytra just visibly longer than 

 wide, having geminate series of distinct though shallow punctures, 

 separated by lines of barely traceable convexity. Length 23.0-24.5 

 mm.; width 9.3-9.9 mm. Mississippi (Pass Christian). Two ex- 

 amples taken by the writer brevitarsis n. sp. 



Hind tarsi longer, as long as the tibiae or very nearly 4 



4 Form a little less abbreviated than the preceding, deep black, with 

 violet side margins, shining, the elytra more or less strongly alutaceous 

 or subopaculate; head similar, except that the apical part of the 

 mandibles, which are similarly moderately strigose, is more slender 

 and prolonged and the median lobe of the labrum more truncate; 

 prothorax nearly similar but a little less transverse and even less 



