THE CANADIAN ENTOMOLOGIST. 263 



and rectilinearly truncate, not broadly arcuato-truncate as in that species, the 

 clypeus with its pubescent median tubercle and the antennae nearly similar, 

 the latter still more elongate, with the large terminal conoidal joint 

 similarly simple and not excavated beneath ; elytra a little more elongate, 

 as long as the abdomen, the humeral elevation not denticulate ; pygidium 

 and abdomen similar. Length, 1.95 mm.; width, 0.7 mm. Pennsylvania 

 (Westmoreland Co.). 



Very close io puncti/ro?is, but the character of the frontal sculpture, 

 and particularly the pubescence of the frontal slope, is markedly different. 

 Another species of this group is represented in my collection by a single 

 female taken at Cincinnati by Mr. Dury. 



Batrisodes tridens, n. sp. — Dark castaneous, the elytra brighter 

 testaceous, subimpunctate, the pubescence long, coarse and distinct; head 

 large, subquadrate, wider than long, carinate at each side above, the eyes 

 rather small, not very prominent, the large nude foveae and ambient sulcus 

 as usual ; frontal margin transversely bilobed, the intermediate broad 

 sinus having, at the lower margin of the sinuosity, a short lamina as in 

 striatus, except that here it is tridentate, the clypeus separated from the 

 upper front by the same transverse excavation, and having at each side a 

 large and sharply-angulate wing, the lower conical part of the clypeus 

 rounded at apex, having on its upper part between the alae a tubercle 

 which is biseriately setulose, and, in addition, with a very large porrect 

 and transversely projecting yellow seta at each side ; antennas moderate, 

 the basal joint large, strongly rounded beneath, compressed and bearing on 

 its anterior face a large oval concavity, which is minutely granulato-punc- 

 tate, second to eighth cylindric, second longer than wide, intermediate 

 joints as long as wide, ninth larger, transverse, tenth large, subglobose, 

 wider than long, scarcely modified on its under surface, though apparently 

 with a small rounded subbasal areola, eleventh conoidal, not quite as wide 

 as the tenth, acutely pointed, unmodified ; prothorax of the usual form, 

 not quite as wide as the head, tristriate and with two short discal carinas ; 

 elytra with oblique and prominent denticulate humeri ; abdomen 

 unmodified at apex. Length, 2.1 mm.; width, 0.78 mm. Missouri (St. 

 Louis). 



This fine species evidently belongs in the vicinity of striatus, Lee, 

 but differs in its paler coloration, tridentate median frontal lamina and 

 concave basal joint of the antennae among other characters. 



