in the same region ; the latter however has a larger and flatter prosternal 

 process, a -normally developed metasternal sulcus and a deeper elytral 

 reticulation, without the secondary ground sculpture. 



A. gagates Aube, Spec. Gen. 1838, p. 306. 



Of moderately large size; broadly oval, black, aenescent, strongly shining in both 

 sexes; front of head and side margins of thorax rufescent; side margins of 

 elytra sometimes feebly so; beneath piceous or rufopiceous, legs and antennae 

 rufous. Elytral reticulation lightly impressed, the meshes irregular throughout, 

 minute punctules occurring almost entirely at the intersections of the reticulating 

 lines. There is a very fine minute secondary reticulation "not easily visible on the 

 disk, but detectable towards the sides and apex. Prosternal process rather short 

 and broad, steeply roof shaped. Pro- and mesotarsi of male moderately in- 

 crassate, the palettes at tips of glandular hairs very small or obsolete; protarsal 

 claws slender, not longer than in the female, the posterior one slightly sinuate be- 

 neath. Length 8 to 9.2 mm. 



This is one of the commonest of the New England species ana 

 ranges as far south as North Carolina ("L. Ellis"). I have seen 

 specimens from South Haven, Michigan in Mr. Sherman's collection, 

 and Sudbury, Ontario (Canadian Nat. collection), and LeConte long 

 ago recorded the species from Lake Superior. It is not given in 

 either the Western Pennsylvania, Cincinnati or Iowa Lists. 



A. tristis Aube, Spec. Gen. 1838, p. 356. 



dubius Mann. Bull. Mosc. XVI, 1843, p. 221. 

 ? subopacus Mann. Bull. Mosc. XXVI, 1853, p. 157. 

 ? atratus Mann. Bull. Mosc. XXVI, 1853, p. 157. 



A large species of elongate oval form, varying greatly in color from yellowish 

 brown through various shades of brown to almost black, with or without paler 

 lateral margins. The thorax varies from testaceous with a median transverse 

 brownish discal fascia to entirely black, the intermediate forms having the lateral 

 and apical margins, or the lateral margins alone more or less paler. Body be- 

 neath piceous varied with rufous; labrum, two vertex spots, antennae, palpi and 

 legs rufous; the outer joints of the antennae, terminal joints of palpi, and pos- 

 terior legs more or less dusky or infuscate. The primary reticulation of the 

 upper surface is rather coarse, the areolae of the elytra large and irregular, with 

 a tendency in the females to become obliquely longitudinal in the basal half. 

 Length 9^ to 10^ mm. 



This is strictly a northern or high mountain species, and occurs from 

 the Aleutian Islands through the Alaskan Peninsula to British Co- 

 lumbia and the high Sierras of California (Lake Tahoe fide Crotch; 

 Mt. Kaiser, 10,000 feet, Blaisdell). It is known to me also from high 

 altitudes in Colorado and New Mexico, Lake Superior, the White 

 Mts. of New Hampshire, and Labrador, while Hamilton records it 

 from Arctic Siberia. 



The anterior protarsal claw of the male has at its base a more or less 

 prominent angulation, feeblest in the Alaskan representatives and most 



33 



