108 AMERICAN COLEOPTERA. 



in front without median fovea: base flatter and broadly depressed each side, the 

 longitudinal striae wide and connected behind their anterior extremities by a 

 feeble transverse impression ; median basal carina nearly obsolete, but traceable 

 in certain lights; hind angles not carinate, the border merely abruptly depressed. 

 Elytra convex, without humeri, rather strongly narrowed to apex, which is para- 

 bolically rounded. Front coxae separated by nearly half the coxal width: meta- 

 sternum longer than first ventral segment and without impressed line. (PI. Ill, 

 figs. 1 and la). Length 1-1.2 mm. 



Hab. — Pennsylvania, Missouri. 



A small series in the Horn collection is all that I have seen. The 

 comparatively robust form and convex elytra without humeri are 

 sufficient to distinguish this species at a glance from any of its 

 American congeners. The punctuation of the pronotum is closer 

 and stronger than usual, the prosternal side pieces are, however, 

 subimpunctate, and the metasternum and abdomen are finely, 

 sparsely punctulate as in the other species. 



H. singular!* Beck. — This species, as will be seen by the figure, is inter- 

 mediate in form between ragusse and kunzei. It is more slender and less convex 

 than the former, but is not distinctly depressed as is the latter. The humeri are 

 nearly wanting, the surface is quite shining, the punctuation very sparse and 

 fine on the pronotum, a little more distinct on the elytra, and almost as strong 

 on the presternum as in ragusse. The antennae are much as in kunzei. Eyes 

 small, distant their own diameter from the antennae, tempora very short. Sculp- 

 ture of the base of the pronotum much as in kunzei, but the basal transverse line 

 is better defined, the median longitudinal carina obsolete, the hind angles not 

 carinate. Front coxae separated by about two-fifths the coxal width. The meta- 

 sternum is scarcely as long as the first ventral segment; a character of import- 

 ance, since in all our other species it is visibly longer than the first ventral. 

 Metasternum without median impressed line. 'PI. Ill, figs. 2 and 2a). Length 

 1.2 mm. 



Hab.— This is a common species throughout Europe, and has 

 been found in various parts of Asia and Africa. It has been re- 

 corded from New York and Yuma in our territory ; but, as has 

 been already remarked, the specimens so referred were quite surely 

 kunzei; its occurrence therefore in our fauna has yet to be verified. 



H. kunzei Aube. — Depressed, yellowish or reddish testaceous, very finely 

 and sparsely punctate, both above and beneath, pubescence fine, short and incon- 

 spicuous. Antennae passing the middle of the prothorax ; first two joints elon- 

 gate, subequal, the first a trifle stouter, third longer than wide, following joints 

 about as wide as long; first joint of club very slightly wider and longer than the 

 terminal joint. Eyes moderate, distant from the antennae by about half their 

 diameter, tempora small, the eyes nearly contiguous to the prothorax in repose. 

 Prothorax a little more than one-fourth wider than long, surface flattened, widest 

 a little behind the front angles, sides sinuate posteriorly, hind angles a little 

 obtuse ; disk with a median punctiform fovea in front of the middle, a longitu- 



