152 AMERICAN COLEOPTKKA 



(except the suture), antennae and legs paler. Form moderately stout and eon- 

 vex ; pubescence cinereous, rather long and conspicuous, the hairs of the elytral 

 intervals shorter and more inclined. Head about tour- fifths as wide as the pro- 

 thorax, strongly but sparsely punctate; tempora parallel, their length fully one- 

 fourth that of the eye as seen from above. Antennae reaching the hind margin 

 of the prothorax, the joints all longer than wide. Prothorax convex, a little 

 wider than long, widest before the middle; sides rather strongly rounded, nar- 

 rowed behind, margin finely serrate; surface moderately strongly punctate, the 

 punctures separated by fully their own diameters; posterior fovea small and not 

 deeply impressed. Elytra elongate-oval, convex, strife distinctly impressed ; 

 intervals slightly convex, their punctures decidedly finer than those of the stria'. 

 Beneath coarsely, rather closely punctate, more finely and sparsely along the 

 median line; the first ventral more finely and sparsely than the metasternum, 

 the following segments finely punctate. Metasternum subequal to the first ven- 

 tral ; middle coxae narrowly separated about one-sixth their own diameter. 

 Legs short. 



Male. — Front and middle tibia? sinuate and strongly mucronate within at tip ; 

 first joint of front tarsi quite strongly, that of middle tarsi distinctly though 

 feebly dilated ; last ventral but little longer than the fourth, the apex broadly 

 rounded, surface not impressed. 



Female. — Tibia? simple; tarsi not dilated ; last ventral hut little shorter than 

 the two preceding united, more narrowly rounded at apex, not impressed. 

 Length 2.1-2.3 mm. 



Hub. — Michigan (Detroit, Saulte Ste Marie); Dakota (Bismarck); 

 Colorado (Garland); Montana (Bear Paw Mt.). 



The variations in color in this species are greater than in any 

 other known to me, but I have not been able in the material at my 

 command to discover any structural characters upon which to base 

 a separation. The pubescence is somewhat less conspicuous, and the 

 femora much stouter than in any of the preceding species. 



<!. |>:t ra llcla sp. nov. — Rufotestaceous. elongate, parallel, convex; pubes- 

 cence sparse, cinereous, the hairs from the strial punctures subrecumbent, those 

 from the intervals more distant, suberect. Head nearly as wide as the prothorax, 

 sparsely punctate; eyes large, prominent; tempora moderate, parallel; antennal 

 joints all longer than wide. Prothorax broader than long, nearly as wide as the 

 elytra: sides strongly, nearly evenly rounded, margin serrulate; surface moder- 

 ately punctate, the posterior fovea small and faintly impressed. Elytra elongate, 

 subparallel ; stria? scarcely impressed, punctures moderately large and approxi- 

 mate, except toward the apex ; punctures of intervals finer and much more dis- 

 tant. Beneath coarsely but not closely punctate, abdomen sparsely, finely punc- 

 tate, except the first ventral, on which the punctures are coarser though sparse. 

 Metasternum longer than the first ventral; middle coxa? very narrowly sepa- 

 rated; fifth ventral a little longer than the fourth in both sexes, not impressed. 

 (PI. IV. fig. 41). 



Mule. — Front and middle tibia? very feebly sinuate and with a small macro 

 within at tip. 



Female. — Tibia? unmodified. Leugth 2 mm. 



