ROLAND HAYWAKD. 0/ 



i>ne-lialf wider than loiijr, very distinctly wider at base than apex, inipunetale : 

 apex emarjrinate, tlie anterior angles pronnnent, but rounded: sides with tlie 

 margin narrowly reflexed, rounded from slightly behind the middle to apex, the 

 posterior setigerous puncture nearer the basal than the lateial margin; trans- 

 verse impressions obsolete or nearly so; median line fine, abbreviated in front; 

 basal impressions feeble or nearly obsolete; base sliglitly liisinuous; hind anglc;- 

 siibrectangular. slightly rounded at tip. not carinate. Elytra slightly wider than 

 the thorax, finely striate, the sides subparallel to behind the middle; liunieri 

 slightly prominent; striae entire, impunctate, the scutellar stiia not terniinatiiig 

 in an ocellate puncture at base; the eighth with the row of ocellate punctures 

 narrowly interrupted at middle; intervals fiat or nearly so. Body benealli 

 black, impunctate ; presternum rounded at tip. Legs black; anterior and hind 

 femora with two. the middle with four setigerous j)unctures along the inner 

 margin ; middle and hind tarsi with the basal joint not grooved on the ontei- 

 side. Length .30-. 36 inch ; 7.5-9 mm. 



Very closely allied to confusa, from which it is not easily recog- 

 nizable except by comparison. The forn) is more oblong and less 

 convex, and the color duller and less aeneous. The hind angles of 

 the thorax are slightly rounded at tip, and the humeri of the elytra 

 more prominent. The posterior setigerous puncture at the side of 

 the thorax is nearer the basal than the lateral margin. 



It is apparently northern in its distribution. Specimens have 

 l)een seen from the Hudson Bay region, Alberta, M(uitana, Wyom- 

 ing and the mountains of Colorado. It was described by Putzeys 

 from the shores of the Rupert River, Hudson Bay Territory. 



46. A. confuMa Lee— Characters nearly as in protenm I'utz. Form less 

 oblong, broadly oval, more '•onv'jx. Color seneous or nigro-aeneous, the surface 

 shitiing. Prothorax slightly less deeply eniarginate at apex; posterior lateral 

 Setigerous puncture equidistant from side and basal margins; hind angles rec- 

 tangular. Elytral humeri somewhat less prominent. Middle and hind tarsi 

 with the basal joint at most finely grooved externally. Length .3:2-. 35 inch ; 8- 

 8.75 mm. 



As will be seen by the above brief resume of the points of diiier- 

 ence between this and the preceding species, the two are difficult of 

 separation, those most worthy of note being the more oval and more 

 convex form of confusa, with its more shining surface, and the 

 different position of the posterior puncture of the side margin of the 

 prothorax. The antennse are of the same color as in protensa, with 

 the second and third joints strongly carinate above. The arrange- 

 ment and number of the setigerous punctures along the inner m:ii-- 

 gin of the femora is also alike in the two species. 



TRANS. AM. ENT. SOC. XXXIV. (fi) M .\RCH. 1908. 



