Trip: ST\(; i{!:i:'n,i:s. 



907 



hies Willi ;i \;\VJ.r incdinii lodlli w liicli imiiils (ihlii|in'ly inwai'd ;iii(l upwai'd. 

 Elytra dooi'Iy striate. Imlli sli'ia' and iiilri'vals liiiclv- and rallu'r closoly 

 punctured. Length I.VlV; iniii. 



Throiti»h()iit the State; i're(|iieiit. April 27-Deeeiul)ci' 8. Ili- 

 bernatcs beneatli old, ]iai-tly burned los^s. Occurs most commonly 

 in June and July alxmt the roots of oak, li)in and maple trees and 

 stumps, in the decaying wood of which the larvie bore. The word 

 Dorciis means antelope, and tliis species is sometimes called the 

 "antelo]-»e beetle." 



111. Platvckkus Geoff. 17r)4. (Clr., "broad i antennae.") 

 Small oblong beetles having the eyc^s nearly entire instead of 

 being notched in front by the sharp side margin of the head; sixth 

 ventral segment visible; front tibitp armed on the outer side with 

 numerous fine, saw-like teeth. The mandibles of the males incline 

 upward and are largei' than those of the females. 



1719 (5416). Platycerus qvercus Web., Obs. Eut, ISOl, S".. 



Oblong, subdein-essed. Blackish or dark reddish- 

 bi'own. often tinged with brassy or greenish, shining. 

 Mandibles of male as long as head and about 6-toothed 

 at tip; of female, much shorter. Thorax one-half wider 

 than long, sides rounded, hind angles obtuse ; surface 

 sparsely punctured, male; more densely and coarsely, 

 female. Elytra with three or four subobsolete stria" 

 next to suture, deeply and rather sparsely punctured. 

 Length 10-12 mm. (Fig. .357.) 



Throughout the Stale; common. March 25- 

 October 29. Occurs beneath bark and logs, es- 

 pecially those of oak. Begins to emerge as imago the latter part of 

 :\larch. :\rates about INfav 1st. 



Fig. 357. Line shows 

 natural size. 



IV. Cerucht'S IMcLeay. 1819. (Or., "bearing a horn.") 

 Larger and more convex than Platycerus, with antennae straight; 

 body subcylindrical and front coxre contiguous. The head of the 

 male is much broader and longer than that of female, and bears a 

 deep frontal excavation. 



1720 (5422). Ceruchi's pkeis Web., ()l)s. Entom., ISOl, .S4. 



Subcylindrical, convex, highly polished. Piceous or dark reddish-brnwn. 

 Male with mandibles as long as head and with a very large median tooth 

 on inner side; head deeply striate on the sides; thorax and el.vtra finely 

 and rather s])arsely punctate. Female with mandibles half the length of 

 head, with three or four blunt teeth on inner side; thor.ax and elytra more 

 coarsely and densely punctured. Elytra shallowly striate in both sexes, 

 the stiMse subobsolete on the sides, f.ength 10-15 mm. ' 



