New Australian LncanidcB. 615 



the base of the elytra, and the ovate form of the latter, which are 

 considerably wider across the middle ; the dilatation of the dentate 

 fore tibiae is of course a sexual character. 



Dorcus carbonarhis. (PI. XXI. fig. 3.) 



Latus, niger, nitidus ; capitis parte antica rugose-punctata ; pro- 

 noti lateribus punctatis, elytrisque minutissime punctatissimis ; 

 clypeo antice angusto, parum producto, truncato, angulis pos- 

 ticis capitis paullo obtuse productis; pronoti marginibus la- 

 teralibus rotundatis, angulis posticis vix emarginatis ; elytris 

 vix costatis, tibiis 2 anticis latis, 5-dentatis, 4 posticis in medio 

 spina una spinulaque adjecta armatis. 



Long. corp. cum mandibulis lin. 17; lat. pronoti lin. 6| ; lat. 

 elytr, in medio lin. 7\. 



Habitat Nova Hollandia, ad litt. sept.-occid. 



In the British Museum. Collected by Burn, Esq., Surg., 



R. N. Presented by Haslar Hospital. 



The broad glossy form of this species distinguishes it from all 

 the other insects to which it is most allied, giving it a certain 

 amount of resemblance to Lucanus glahratus of De Haan, but the 

 general structure of the insect will not allow of its approximation 

 to that insect in the arrangement of the family. The head is 

 rather small, with the anterior angles entirely rounded off in an 

 oblique direction ; tiie hinder angles behind the eye are slightly 

 angulated ; the front margin of the head is emarginated, and in 

 the middle is a small advanced clypeus, truncated in front ; the 

 mandibles (female) are small, strong, and with a large tooth in the 

 middle of the inner margin ; the mentum is semicircular; the 

 maxillae rather small, witii the inner lobe acute at the tip ; the 

 palpi are small, the first and third joints being the shortest ; the 

 labium is bifid and setose, and the labial palpi have the three 

 joints of nearly equal length, the last being rather curved. The 

 eyes are partially divided by the lateral septum of the skull. 

 The antennae rather short, with the 6th and 7th joints small, 

 each producing a seta; the three terminal joints small, the 

 last rounded at the apex ; the prothorax is large, much wider than 

 the head ; the lateral margins regularly rounded and marginated, 

 smooth, with the sides punctured ; the posterior angles slightly 

 produced; the fore margin strongly sinuated. On each side, 

 within the lateral margins, is an oval impression of considerable 

 size. The elytra are large and broad, being wider in the middle 

 than the prothorax ; they are delicately and closely puncturedj 



