4O2 MEMOIRS ON THE COLEOPTERA 



riorly, becoming subparallel in about basal fifth; base as wide as the 

 distinctly sinuate apex, only feebly oblique laterally; anterior im- 

 pression distinct, subangulate, the posterior not distinct, very dif- 

 fuse; foveae large, shallow, the outer wanting; side margins broadly 

 reflexed; hind angles sharp, the nick obsolete as* usual in this section; 

 elytra three-fourths longer than wide, not quite one-half wider than 

 the prothorax, parallel, the sides gradually rounding behind, with- 

 out sinus, gradually arcuate basally; striae moderate, deeper api- 

 cally, distinctly impressed and obsoletely punctulate suturally, the 

 seventh distinct, the ninth very fine, the space between the eighth 

 and margin much narrower than in the preceding section, the ocel- 

 late series entire but fine. Male with the anterior femora angulate 

 beneath behind the middle, the tibiae straight, the tarsi with the 

 first two joints very feebly dilated; posterior trochanters much less 

 than half the femoral length and acutely pointed; last ventral with 

 a single very small apical puncture far to each side; female with two 

 close-set punctures at each side, the hind trochanters more obtuse, 

 scarcely more than a fourth the femoral length. Length (cf 9 ) 

 10.0-10.5 mm.; width 3.5-3.6 mm. The female the smaller. Colo- 

 rado (Boulder Co.) breviceps n. sp. 



Head slightly to distinctly longer than wide, the neck less abbreviated; 



mandibles more prominent and more incurved at tip 8 



8 Space between the eighth elytral stria and the margin narrower than 

 the eighth interval as in the preceding; frontal sulci extending at 

 least to the middle of the epistoma; antennae moderately long and 



slender; elytra narrower, parallel 9 



Space between the eighth stria and the sides as wide as the eighth inter- 

 val, the elytra broader and more oblong-suboval; frontal sulci ex- 

 tending to but not upon the epistoma; antennae notably longer and 



more slender 10 



9 Form moderately narrow, subparallel and feebly convex, dark piceous- 

 brown in color, the femora blackish; head nearly three-fourths as 

 wide as the prothorax, the eyes well developed but only moderately 

 prominent; sulci long, coarsely impressed and subparallel; antennae 

 dark rufous, half as long as the body; prothorax not quite two-fifths 

 wider than long, the sides broadly reflexed, subevenly rounded, be- 

 coming subparallel in about basal sixth; base rather wider than the 

 moderately sinuate apex, only slightly oblique laterally, the angles 

 sharply defined, the anterior moderately blunt; impressions distinct, 

 the posterior more obsolete medially in the female; fovese distinctly 

 impressed, rugulose, the outer evident but feeble, linear; elytra three- 

 fourths to four-fifths longer than wide, a third, or more (9 ), wider 

 than the prothorax, the parallel sides rapidly more rounded at the 

 humeri, gradually subcircularly rounded at apex, the sinus wholly 

 wanting; striae fine but everywhere distinct, not at all less so apically, 

 evidently impressed suturally throughout but barely at all punctu- 

 late, the third with the usual three punctures. Male with the an- 

 terior femora evenly and feebly arcuate beneath, the tibiae straight 

 and the tarsi more inflated than in the preceding, though moderately; 

 hind trochanters a third as long as the femora, sharply pointed, the 



