Lucanoid Oolcoptera. 69 



lato, angulis ante oculos acutis; prothorace lateribus 

 antice obliquis^ rectis, angulis posticis valde emargi- 

 natis, prope angulos profnnde foveato^ in medio antice 

 canaliculato et irregulariter impresso, sub lente crebre 

 et minutissime punctulato ; elytris Isevissimis, brunneo- 

 geneo-tinctisj confertissime et tenuissime granulatis, pone 

 humeros impressis, linea suturali vix distincta ; scutello 

 transversOj rotundato, viridi-metallico, dense punctate ; 

 corpore subtus viridi-metallicOj valde et dense griseo- 

 piloso ; pedibus brunneis^ femoribus purpureo-viridibus, 

 tibiis anticis elongatis, curvatis^ intus et extus serrato- 

 dentatis, intermediis et posticis extus minutissime tuber- 

 culatis^ et prope apicem spina acuta instructis. 



Long. corp. (mandib. incl.) unc. 1, lin. 1. 



Hah. — Chili. Coll. Brit. Mus., Saunders et Parry. 



C. impuhis is allied to C. LatreiUii, Solier, $ (described 

 also by Mr. Thomson under the name of C. Beicliii, ($) 

 and of which a figure is given in the present publication 

 (PI. I. fig. 6) differing, however, in its uniform glabrous 

 appearance, its smooth and shining prothorax, with the 

 mandibles considerably more elongate and deflexed. It 

 is very possible, however, that in a series of specimens 

 of various developments, this insect may ultimately prove 

 to be only the var. max. of G. LatreiUii. The latter 

 differs in the head being smaller, the mandibles consi- 

 derably shorter and porrect, the sides of the prothorax 

 more rounded, and slightly subserrate, with the disc 

 exhibiting numerous irregular impressions, the elytra, 

 moreover, being further somewhat rugulose ; the anterior 

 legs are also considerably shorter, their tibige less curved, 

 and less denticulate internally, and finally, the under 

 surface of the insect is conspicuously less pubescent. 

 These differences may possibly be only abnormal, and 

 produced by the undeveloped condition of the insect; 

 for the present, however, I think it necessary to regard 

 C. impuhis as a distinct species. The various specimens 

 hitherto received, were captured at Mendoza, on the 

 eastei'n side of the Cordillera. 



Sjjlicnognatliiis alhufusciis, ? , Blanchard. 



The author, in his description of this insect (Voyage 

 do D'Orbigny, p. 193), appears to be in some doubt as 



TRANS. ENT. SOC. 1870. PART I. (MARCH.) G 



