176 Coleopterological Notices. 



Colorado (Greeley), 



A very interesting form, quite isolated by reason of its small 

 size, convex subglobose elytra, and very short subrecumbent pubes- 

 cence. It is one of the many interesting discoveries of Mr. H. F. 

 Wickham. 



USECHUS Mots. 



Two species of this genus are now known ; they may be dis- 

 tinguished as follows : — 



Median impressed area of pronotum fusiform, entire, more or less coalescent 

 with the basal fovea, the latter narrow and elongate ; elytral punctures very- 

 large, widely separated in the rows ; pubescence very sparse ; color blackish- 

 piceous lacerta 



Median impressed area feeble, the subcariniform sides nearly straij^ht and 

 parallel, entirely obsolete just beliiud the middle ; basal fovea larger, 

 i-ounded, always deep, distinct and isolated ; elytral punctures smaller, 

 more closely placed ; pubescence denser and rather longer, more densely 

 and conspicuously nucleated in twelve small spots on the elytra ; color 

 paler, brown; size smaller Illicleatus 



The species above defined as lacerta, has been identified from the 

 somewhat unsatisfactory figure given by Motschulsky. 



U. nucleatus n. sp. — Of the same form as lacerta; pubescence pale 

 flavate, rather sparse but denser and conspicuous on the elevated ridges, and 

 in twelve spots on the posterior two-thirds of the elytra, disposed on each 

 elytron as follows: one just before the centre, three in an oblique line at 

 posterior third, and two in a line nearly parallel to the suture, rather indis- 

 tinct, and very near the apex. Head small, rather coarsely and sparsely 

 punctate. Prothorax as wide as long ; posterior angles small, acute and promi- 

 nent ; base four-fifths as wide as the disk ; surface finely tuberculate, each 

 tubercle with a small lateral puncture bearing a stiff subrecumbent seta. 

 Scutellum extremely minute, twice as long as wide, pointed, slightly tumid. 

 Elytra with fine feeble costse, the intervals deeply punctate, the humeral costa 

 very strong toward base, the base also very strongly tumid at one-third the 

 width from the suture to the sides, the posterior densely pubescent spots also 

 slightly tumid. Length 3.0-4.2 mm. 



California (Humboldt Co.). 



Occurs in great abundance in the Hoopa Valley, and may be dis- 

 tinguished at once from lacerta, not only by the characters given 

 in the table, but by the form of the smooth and impunctate furrow 

 which extends along the lateral edges of the pronotum behind the 

 antennal excavations. In the present species this furrow extends 

 nearly in circular arc from the excavations, past the basal angles. 



