242 Trans. Acad. Sci. of St. Louis. 



rather coarsely, very densely punctured, the second and third narrower 

 and much less coarsely and more closely punctured tkan In arizonica, 

 impunctate narrowly at the sides; hind tarsi very slender, the basal 

 joint about as long as the entire remainder. Length 2.9-3.4 mm. ; 

 width 0.66-0.69 mm. Colorado (Colorado Springs), — H. F. Wickham. 



fontinalis n. sp. 

 Form nearly similar, convex, polished, the sculpture similar but stronger, 

 body piceous- black throughout, the elytra and basal ventrals some- 

 what paler, the antennae infuscale, paler toward base; femora blackish, 

 the tibiae piceous, the tarsi flavescent; vestlture wholly inconspicu- 

 ous; head as in fontinalis, the basal angles very broadly rounded 

 but having the surface very broadly, feebly impressed toward the median 

 line, the latter very finely and feebly but acutely impressed by re- 

 flected light; antennae longer, extending to the end of the elytra, 

 stout but rather less incrassate distally, the second and third joints 

 equal, the ninth fully as long as wide and rather longer than the tenth, 

 which is somewhat wider than long; prothorax formed as in the two 

 preceding species, narrower than the head, the minute and sparse 

 punctulation closer, coarser and rather strongly asperate on the convex 

 slopes of the deep sulcus, especially at base; scutellum similar; elytra 

 nearly similar, more transverse, fully four-fifths wider than the pro- 

 thorax but not definitely longer, the punctulation unusually close and 

 strongly asperate, especially near the inner basal angles, the sutural 

 impression stronger than in fontinalis; abdomen similar in form and 

 sculpture, not quite as wide as the elytra, the punctures of the first 

 impression coarse and irregularly crowded, those of the second 

 and third only slightly coarse but closely and irregularly crowded; 

 basal joint of the hind tarsi almost as long as the entire remainder, the 

 next three uniformly and rapidly decreasing in length. Length 3.1- 

 3A mm. ; width 0.66-0.72 mm. New Mexico (Cloudcroft), — W. Knaus. 



acomana n. sp. 



5 — Head strongly, almost evenly rounded at base 6 



Head broadly arcuato-truncate at base, with much more distinct angles.. 7 



6 — Body moderately slender, convex, polished, the integuments not micro- 



reticulate at any part, pale rufo-castaneous, the abdomen blackish 

 posteriorly, the elytra sometimes slightly paler at base; pubescence not 

 very conspicuous; head orbicular, convex, not impressed, the eyes 

 small, the antennae extending fully to the apex of the elytra, rather 

 slender toward base but sensibly thick and incrassate distally though 

 very gradually as usual, the subapical joints equal and slightly longer 

 than wide, the second and third subequal; punctures very minute and 

 sparse but becoming larger, closer and asperate on the occiput; pro- 

 thorax distinctly narrower than the head, narrow and elongate, the 

 sides evenly rounded anteriorly, thence strongly convergent and feebly 

 sinuate for a long distance to the base, deeply eulcate, the punctures 

 very minute and sparse but becoming closer, larger and asperate nar- 

 rowly on the convex slopes of the sulcus ; scutellum finely and rather 

 sparsely granulose, very finely carinate, the carina sometimes extending 

 to the extreme tip; elytra fully four-fifths wider but only very slightly 

 longer than the prothorax, of the usual form in the preceding section 



