THE CANADIAN ENTOMOLOGIST. 279 



coarsely and closely punctate throughout, except in a small patch above 

 each eye and on the occiput, the pronotum not abruptly coarsely punctate 

 near the sides as in that species, but with the coarse punctures extending 

 inwardly broadly, becoming very gradually smaller medially ; the elytral 

 sulci are deeper, more close-set and more evenly spaced, the sulci through- 

 out as wide as the intervals or nearly so ; differing ( °. ) in its much smaller 

 size, narrower form and in the deeper, more close-set and more evenly- 

 spaced elytral sulci ; the tarsal, claws are decidedly smaller in both sexes. 

 Length, 16.0 mm.; width, 6.6-7.0 mm. Two specimens from the Levette 

 cabinet, probably collected in Indiana. 



Platycerus, Geoff. 

 Ccerulescens, of LeConte, is a species from southern California that 

 has been wholly lost sight of in recent years, and probably considered a 

 synonym of Oregonensis. That it is a synonym of that species seems 

 improbable, however, as the basal angles of the male prothorax are said 

 to be obtuse but not at all rounded ; they are distinctly rounded in 

 Oregonensis, and the localities are very different. I would be inclined to 

 regard chalybeus as synonymous with cxrulescens, were it not for the facts 

 that it is very much smaller in size and has the basal angles of the male 

 prothorax slightly prominent, subeverted and right to slightly acute. 



The forms allied to quercus are difficult to define satisfactorily, but I 

 note a number of very evident modifications of that type, some of which 

 are probably specific in value. Quercus, occurring abundantly in Indiana, 

 is a small species, the male narrow, parallel, with the head only moderately 

 coarsely or closely punctate, the prothorax scarcely more than one-half 

 wider than long, the sides converging anteriorly more or less from the 

 angulation near basal third, with the side margins but narrowly reflexed, 

 the punctures close-set but only moderately coarse ; the elytra three-fifths 

 longer than wide, only moderately coarsely punctate to somewhat finely 

 so and obscurely punctato-striate. The female is larger, more convex, 

 more coarsely sculptured, paler and more yeneous in lustre and with the 

 prothorax less transverse and more narrowed anteriorly. The length and 

 width of five males before me, including the mandibles, are 8.0-10.0 by 

 2.9-3.5 mm. j the corresponding dimensions of six females being 8.0-10.0 

 by 3.0-4.1 mm. The following are two modifications of this type, which, 

 to be on the safe side, I will call subspecies for the present ; they are 

 described from the male : 



