AMERICAN COMPONENTS OF THE TENTYRIIN^ 4O9 



Body less stout and smaller than in canaliczilattis, deep black with a 

 moderate, scarcely metallic lustre, the pubescence short, sparse 

 and rather inconspicuous ; head not very coarsely and only moder- 

 ately closely punctured, the epistomal lobe parabolic and very ob- 

 tuse ; prothorax {(^) large, two-thirds wider than long, the apex 

 barely three-fourths as wide as the base, the sides absolutely evenly 

 and strongly arcuate fi^om the apex of the basal to the apex of the 

 apical angles, the latter abbreviated, acute but only slightly prom- 

 inent, the basal but slightly less than right ; surface almost evenly 

 convex, barely perceptibly and broadly flattened medially, the 

 apical lobe very broad and feeble, the punctures fine but strong, 

 very sparse, with a partial smooth line medially, slightly coarse 

 but well separated laterally and scarcely smaller though denser at 

 the edges ; prothorax ( 9 ) very much smaller in size and fully as 

 transverse, trapezoidal, with the sides virtually straight, slightly 

 sinuate behind the apical angles, which are finely acute and just 

 visibly everted, the basal very acute but not everted, the thickened 

 margin rapidly broader basally, the ridges not very strong, convex, 

 the intervening depression only moderately deep, the punctures 

 rather fine, sparse, with a distinct smooth line, decidedly coarse 

 and rather close-set laterally ; elytra nearly as in canaliculatus 

 but with the punctures very fine and sparse suturally, wath the 

 coarser pvmctures in the impressed lines somewhat obvious, especi- 

 ally in the female, coarser but shallow, not rough and only moder- 

 ately close laterally. Length 10. 8 mm. ; width 4.8-4.9 mm. 

 Arizona (Ash Fork), — F. H. Snow funebris n. sp. 



18 — Form moderately stout, convex, shining, black, with a pronounced 

 bronze lustre, the pubescence very short, sparse and inconspicu- 

 ous ; head moderately coarsely, not very densely punctate centrally, 

 more finely and closely elsewhere, the epistoma obtusely ogival ; 

 prothorax ( 9 ) rather less than one-half wider than long, the apex 

 fully four-fifths as wide as the base, the sides subevenly and very 

 feebly arcuate from the moderately acute and uneverted basal 

 angles to the feeble sinus behind the apical angles, the latter acute, 

 somewhat prolonged, slightly everted and prominent, the thick- 

 ened margin broader toward base, the surface abruptly flattened 

 medially toward base, the ridges modei'ate, parallel, obsolescent 

 behind the middle, the anterior depression very feeble, scarcely 

 more than flattened, the punctui'es fine and sparse, with a subentire 

 smooth line medially, moderately coarse and closer laterally, be- 

 coming dense near the sides; elytra nearly as \n caiialiczilattis 

 but almost one-half wider than the prothorax, with very obsoletcly 

 and broadly impressed lines suturally, the punctures fine and 

 sparse, with coarser punctures in the depressed lines, coarser and 

 close-set, shallow but submuricate laterally ; male unknown. 

 Length 10.5 mm. ; width 4.9 mm. Arizona (San Bernardino 

 Ranch, Cochise Co.), — F. H. Snow perditus n. sp. 



Form very stout, polished, deep blue-black in color, without trace of 



Proc. Wash. Acad. Sci., September, 1907. 



