Lucanoid Coleoptera. 77 



tial characters existing between C. Luxerii and C. Buch-' 

 leyi, extracts from the descriptions given by Mons.- 

 Buquet and Mr. Thomson are quoted. Mons. Buquet 

 says : — 



''The mandibles are one-third longer than the head 

 and prothorax together, wide and flat upon their upper 

 surface, bifurcate at their extremity, emarginate and 

 armed with a strong tooth close to the apical termination ; 

 antennce the length of the mandibles, the joints being 

 flattened from the second, the sixth joint being consider- 

 ably more dilated, the four last joints, which form the 

 clava, being short. Protliorax convex, narrow in front, 

 broad at the base, finely punctured above, and rugose 

 underneath ; the posterior angles deeply emarginate, 

 forming a very acute angle. Elytra oval, elongate, 

 rounded at the extremity as well as at the humeral angles. 



Mr. Thomson's description of G. Georgius is as follows : 

 " Mandibulce elytrislongiores, subrectfe, validse, singul^e 

 post medium intus dente sat valido armatae, versus apicem 

 extus abrupta, truncatae, apiceque valde bifidse ; antennce 

 elongatas, mandibulis longiores, 10-articulatge, scaphus 

 prothorace longior, articulis 3, 4, 5, 6 gradatim decres- 

 centibus, clava 4-articulato ; jyrotliorax subtrapezoidalis, 

 ad angulos laterales posticos latiori illos productos acutos ; 

 capite vix longior, marginibus anticis posticisque 

 sinuatis. Elytra oblonga ad humeros latiora, margine 

 paulo reflexo, apice rotundata/' 



This description of the insect appears in the main to 

 correspond with that of Mons. Buquet, with the exception 

 that the author does not allude in any way to the 

 humeral angles of the elytra, which Mons. Buquet states 

 to be rounded. 



C. BucMeyi, n. sp. (?, Parry (var. max.). PL I. fig. 1. 



C. niger, nitidissimus, glaberrimus. Mandibulce elytris 

 breviores, robustae, arcuatae, fere cylindricae, punctatae, 

 intus prope basin binodosae; apicibus bifurcatis, intus 

 post medium emarginatis dente, acuto armatis. Caput 

 magnum, punctatum, antice fortiter emarginatum ; angulis 

 ante oculos productis; disco triangulariter excavate ; 

 clypeo parvo, binodoso. Antennoi elongates, mandibulis 



