developed in those from California and New Mexico ; I have however 

 been unable to correlate it with other variations in a way to define 

 any well marked races. 



A. leptapsis Lee. Proc. Am. Phil. Soc. XVII, 1878, p. 596. 

 Allied in a general way to tristis, but somewhat smaller and more narrowed in 

 front, the form in consequence being more regularly oval. The color above is 

 black or piceous, the lateral margins and epipleura not or only just perceptibly 

 paler. Antennae, palpi and body beneath nearly as in tristis. In the male the 

 surface is shining and moderately coarsely irregularly reticulate, the areolae sub- 

 elongate baso-medially ; in the female the elytra are densely strigoso-reticulate 

 and dull, the areolae very elongate or sublinear throughout. Metasternal length 

 between the meso-coxae and coxal plates evidently greater than half the length 

 of the latter, while in tristis it is rather less than half the length of the coxal 

 plates. In the male the four anterior tarsi are moderately dilated, but in the 

 single male seen, the tarsal claws are missing so that it is impossible to say if 

 they are furnished with a basal tooth or angulation as in tristis. Length 9.5 to 

 9.9 mm. 



LeConte's unique type of this very rare species is a female from 

 Marquette, Michigan. Aside from this I have seen only a single 

 pair from Sudbury, Ontario, the male in the Canadian National 

 collection, the female in my own collection. 



A. discors Lee. Proc. Acad. Nat. Sci. Phila. 1861, p. 341. 

 Oblong oval, body deep black above and beneath, epipleurae piceous brown; an- 

 tennae and legs dark rufous to rufopiceous. Male shining, female opaque, the 

 elytra in both sexes longitudinally strigoso-reticulate. Lateral margins of thorax 

 wide. Metasternum short; intercoxal groove short, rudimentary; last ventral 

 strigose each side of the middle in the male, as in nigroaeneus. Male pro- and 

 mesotarsi distinctly incrassate, the protarsal claws elongate and sinuate beneath, 

 the anterior one slightly stouter. Length 10 to 10.7 mm. 



This very distinct species, one of the largest in our fauna, is most 

 often taken in Oregon and Washington, but I have seen specimens 

 from as far north as Vancouver, and one example in the Roberts 

 collection is labeled "California." It seems to be rather common at 

 Corvallis, Oregon. LeConte's type was from "Wash. Terr." 



A. clavatus Lee. Smithson. Cont. to Knowl. XI, 1859, p. 4. 

 Elongate oval, brownish yellow, margins of elytra a little paler, the head and 

 prothorax clearer rufotestaceous ; abdomen darker, varied with rufopiceous; 

 antennae, palpi and legs rufous, the outer joints of the antennae and the terminal 

 joints of palpi in apical half, piceous. Elytra very finely and regularly reticulate, 

 with sparse minute punctulation evenly distributed. Prosternum compresso- 

 carinate; metasternal wings narrow, sublinear externally; coxal plates strongly 

 developed, angulate at their anterior limits, hind tibiae with or without a marginal 

 series of punctures. 



Male characters : antennae compressed and dilated apically, the last five joints 

 forming a distinct though gradually formed club, joints 8-n excavated basally 

 beneath ; pro- and mesotarsi moderately incrassate furnished beneath with mod- 



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