400 MEMOIRS ON THE COLEOPTERA 



5 Mandibles long and prominent in both sexes. Body larger than in 

 any other species, rather stout, subparallel, deep black, more shin- 

 ing than usual; head large and elongate, only very slightly contracted 

 at base, the eyes scarcely more prominent than the tumid sides be- 

 hind them; sulci very coarse; epistoma tumid in anterior half; an- 

 tennae black, not very thick, extending behind the thoracic base; 

 prothorax large, only slightly wider than long, widest at the middle, 

 the sides feebly converging thence anteriad, feebly oblique but not 

 sinuate toward the hind angles, feebly reflexed, the edge finely and 

 abruptly erect and, toward the rounded, anteriorly produced and 

 lobiform apical angles, becoming conspicuously and broadly reflexed; 

 base sinuously very oblique at the sides, the angles scarcely more 

 than right, the nick distinct though shallow; transverse impressions 

 distinct but diffuse, the rather fine deep and even stria biabbreviated; 

 inner fovea very large, shallow and diffuse, the outer narrow and 

 short but more sharply defined; elytra oblong, parallel, two-thirds 

 longer than wide, scarcely a third wider than the prothorax, sub- 

 circularly rounded at tip; striae not very fine and distinctly impressed, 

 the outer less so though distinct and feebly punctate; intervals con- 

 vex; anterior tarsi (cf ) only slightly dilated, the tibia broadly arcu- 

 ate, the inner tooth near apex distinct; hind trochanters gradually 

 aciculate, three-fourths as long as the tibiae, the tibia feebly sig- 

 moid. Length (cf) 14.5-15.5 mm.; width 5.2-5.4 mm. Washing- 

 ton State. Two examples strenuus n. sp. 



Mandibles rather short, more rounded externally 6 



6 Form parallel, slightly convex, deep black, more polished than usual; 

 head fully two-thirds as wide as the prothorax, subquadrate, the 

 neck almost as wide as the distance across the eyes, which are not 

 prominent; sulci long, very broad and deep, parallel; epistoma nearly 

 flat, with a feeble foveiform impression at base; antennae black, rather 

 stout, extending but slightly behind the thoracic base; prothorax 

 large, barely at all wider than long, equally wide at base and apex 

 as usual in this genus, widest at the middle, the sides very feebly 

 arcuate, nearly straight, subparallel and feebly crenulate anteriad, 

 barely at all converging and just visibly sinuate posteriad; base ob- 

 lique at the sides, the angles slightly blunt, the nick distinct; sides 

 feebly reflexed, the lobiform apical angles rounded and broadly 

 deplanato-reflexed; apex subtruncate; impressions feeble but evi- 

 dent, the stria biabbreviated; inner fovea large, shallow and finely 

 scabrous, the outer a fine sharp impressed line, not delimiting a car- 

 ina; elytra parallel, with straight sides which rapidly round at base, 

 three-fourths longer than wide, not a third wider than the prothorax; 

 striae rather feebly impressed, not fine and very minutely punctulate; 

 intervals nearly flat. Male with the anterior tibiae broadly arcuate, 

 the femora obtusely dentate beneath at the middle, the tarsi feebly 

 dilated; hind tibiae strongly sigmoid, with longer and closer coarse 

 hairs within, except basally, the trochanters gradually finely acic- 

 ulate and subequal in length to the femora. Length (cf ) 12.7-14.0 

 mm.; width 4.6-4.8 mm. -Nevada (Reno). Two specimens. 



rectus n. sp. 



