TENEBRIONID^E 141 



strong, not dense; antennae as long as the prothorax, the latter 

 relatively large, fully four-fifths as wide as the elytra, barely a third 

 wider than long, the deeply sinuate apex much narrower than the 

 base; surface broadly, evenly convex, with rather small and feeble, 

 sparse, very irregularly distributed punctures and an irregular feeble 

 impression at each side near basal third and outer fifth; sides moder- 

 ately and evenly arcuate, unusually narrowly reflexed, very deeply, 

 transversely rugose, the basal impression moderate, transverse; 

 elytra widest near apical third, the sides thence feebly converging 

 and perfectly straight to the rectangular though blunt hum en just 

 behind the thoracic angles, the sides apically rapidly rounding, the 

 lobe moderate, rather short; surface with very indistinct vestiges 

 of the usual three fine costules and with coarse, irregular and rather 

 shallow punctures, usually clearly separated by the strongly alu- 

 taceous interspaces; side margins unusually high and thin, ending 

 abruptly at apical fifth or sixth; under surface more shining, the 

 legs long and slender. Length 23.0 mm.; width 10.0 mm. Arizona 

 (Huachuca Mts.) directa n. sp. 



Prothorax nearly as in rimatus; elytra elongate, strongly rounded on the 

 sides, subcylindrical and with a very short humeral carina; surface 

 smooth, very finely punctate. Desert regions bordering the Gila 

 River, Arizona subcylindricus Horn 



The few characters given above to define subcylindricus are all 

 that have been published and are insufficent to enable me to place 

 it very exactly, the name would imply a greater degree of convexity 

 than in any form known to me and the very short humeral carina 

 would appear to be as in the obovatus group, but the published 

 figure shows a prothorax unusually large even for the present group, 

 being about as wide as the elytra and wholly unlike obovatus; it is 

 evidently a distinct species and not a variety of marginatus as 

 originally published. A species described in few words by LeConte, 

 in the remarks after his diagnosis of Pelecyphorus sordidus (Proc. 

 Acad. Phil., VI, p. 445), under the name P. subcostatus, has obovate 

 elytra, dilated gradually for three-fourths of their length, somewhat 

 flattened anteriorly, very declivous and subacute posteriorly, 

 truncate at base, the acute lateral margin extending to about apical 

 fifth, the surface sparsely punctured, each elytron marked with 

 three faint elevated ridges, obsolete at both ends and of which the 

 external is most distinct; under surface and legs as in sordidus. 

 This is evidently allied closely to the species above described under 

 the name caliginosus, only there it is the inner of the faint costuli- 



