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IV. On a neiv genus and some new species of Coleoptera, 

 belonging to the family Lucauidge. By Charles 

 O, Watekhouse, 



[Bead 1st March, 1869.] 



I WISH to bring before the Entomological Society's notice 

 this evening, four species of Goleoptera, belonging to the 

 family Lucanidos, which I believe to be as yet undescribed. 



One of these, although by no means the most remark- 

 able at first sight, possesses such peculiarities as to make 

 it necessary to form a new genus for its reception. 



This insect, which is from Northern India (I believe 

 from the Cashmere district, although I have no precise 

 locality) is entirely dullish black, and its general appear- 

 ance led me at first to seek its place near Dorcus, but 

 finding it differently constructed, I next referred it to 

 and left it in the genus Cladognathus. Upon farther 

 examination, however, I find that the mentum is unlike 

 that of any other species of Lticanidoi that I have examin- 

 ed; the eye is moreover entirely divided by the canthus, 

 a character quite strange to Chidogvatlnis and to the 

 other genera with which it could possibly be associated ; 

 the produced portion of the presternum between the 

 coxEe is very narrow and grooved, a character, I believe, 

 without a parallel in the Liicanidce ; and finally, the pos- 

 terior tibise are much enlarged at the apex, which is only 

 to be found in the genus Lucamis, and even there, the 

 enlargement does not, except in the females, exist to 

 such an extent as in the insect now in question. I 

 therefore propose to make a new genus of it, and to call 

 it Axdacostetlms, which may be briefly characterized as 

 follows : — 



AuLACOSTETHUs, gen. nov. 



Mentum broader than long, bowed in front, with the 

 posterior angles rounded ; eyes entirely divided by the 

 canthus, which is slender; prosternum between the an- 

 terior coxae narrow, with parallel sides, longitudinally 

 canaliculate ; the four posterior tihice much enlarged at 

 the apex, each furnished on the outside in the middle 

 with a small tooth ; tarsi somewhat short, the basal four 

 joints of each furnished beneath at the extreme apex 

 with two pencils of fine bristles. 



TEANS. ENT. SOC._1869. — PART I. (APEIL) . 



