212 MEMOIRS ON THE COLEOPTERA 



tibiae much more slender and less inflated distally than in the pre- 

 ceding section, the external spinules numerous; basal of the three 

 teeth of the anterior tibiae small though evident. Length 5.8 mm.; 

 width 3.5 mm. Arizona militaris Horn 



Outline less elongate, more quadrate-oval, similar in coloration through- 

 out; head similar, smooth, feebly impressed anteriorly, the stria 

 entire; mandibles more slender and apically more arcuate, smooth; 

 prothorax narrower but otherwise similar, the sides continuing the 

 arcuate sides of the elytra; short anterior outer lateral stria a little 

 nearer the sides than in militaris; elytra nearly similar and similarly 

 striate, the sutural stria scarcely at all crenulate; punctures of the 

 propygidium smaller and very remotely scattered, those of the py- 

 gidium differing very much, being almost completely obsolete except 

 toward base, where they are evident though sparse; in militaris they 

 are much more even in size and are distinct throughout; under 

 surface and legs nearly as in militaris, the lateral fringe of the pro- 

 thorax similarly obsolete; large apical tooth of the anterior tibiae 

 similarly feebly and narrowly bifid at tip, not having the abrupt 

 smooth rounded extension seen in the preceding section. Length 

 4.2-4.9 mm.; width 3.0-3.2 mm. New Mexico (Fort YVingate, 

 Las Vegas and Cimarron). Five examples. .. . quadratulus n. sp. 



12 Narrowly oblong-suboval, convex, shining, black, the legs piceous; 

 red areas of the elytra not attaining the sides and still further removed 

 from the apex, the black plaga wider than long, extending behind the 

 middle; head smooth, very feebly impressed anteriorly, the stria 

 entire, transverse and rectilinear on the front; mandibles with the 

 internal tooth large and at the middle; prothorax transverse, the 

 sides feebly converging, arcuate, more so anteriorly; surface with 

 small confused punctures along the basal margin, the outer lateral 

 stria apical, not extending to the middle, the inner subentire, slightly 

 sinuous; space between the two striae confusedly punctate; elytra 

 transverse, a third longer than the prothorax and, at basal fourth 

 where there is a feeble but rather abrupt inflation, slightly wider; 

 two inner of the three entire striae unusually bent, the fourth and 

 fifth more or less developed behind the middle but not at base, the 

 sutural distinct from before the middle nearly to the apex, the 

 humeral represented by a very short basal remnant close to the 

 first dorsal, the subhumeral wholly wanting; pygidia not very finely, 

 deeply, evenly, very densely punctate, the pygidium smooth apically, 

 the propygidium with two small basal smooth areas at each side; 

 prosternal lobe broadly rounded and finely margined; mesosternum 

 rather deeply sinuate; hind tibiae somewhat slender, the anterior 

 obtriangular, with a few minute wart-like projections along the 

 outer margin basally but with only one true tooth, the bifid apical; 

 lower tibial surface smooth. Length 4.5 mm.; width 2.7 mm. 

 Oregon oregonus Csy . 



13 Rather broadly oblong-oval, polished, black, the femora black, the 

 tibiae piceous and the spinules fulvous; red areas attaining the sides 

 at base and posteriorly but not medially, far removed from the apex 

 and, as usual, separated at the suture, the black plaga wider than 



