of some New Species of Exotic Lucanida?. 209 



Sp. 10, Scleroslomus costatus, (PI. XI. fig. 5.) 



Supra opacus, piceo-niger, pronoto et elytris obscure sanguineo- 

 notatis ; punctatus, capite tuberculo nitido iitrinque ante 

 oculos posito ; pronoto canali lato medio parum profundo, et 

 utrinque impressionibiis duabus rotundatis, antica minus dis- 

 tincta, impresso; medio marginis antici in mare in tuberculum 

 elevato ; elytris costatis, costis interrrupiis, 2da e sutura 

 crassiori ; interstitiis seriatim punctatis; tibiis anticis spinis 

 C parvis obtusis; intermediis 1 media alterisque duabus sub- 

 basalibus ; posticis 1 media alteraque minutissiraa subbasali 

 armatis. 



Long. Corp. lin. 



Habitat in Brasilia. 



In Mus. Miers et Hope. 



Sclerostomus costatus, Burmeister, Hand. d. Ent. vol. v. p. 426 ; 

 Hope, Ca. Lucanidae, p. 27 {Sclcrognathus c.) 



Plate XI. fig. 5, Sclerostomus costatus, fern, magnified; 5a, head and prono- 

 tuni of the male ; 5 6, mandible of the male ; 5c, maxilla of male; 5d, maxilla 

 of female ; 5 e, mentum and palpi. 



The male of this curious Brazilian insect is distinguished by 

 the cucullated front of the prothorax, which in both sexes is 

 deeply impressed along the centre, with lateral circular im- 

 pressions. I am indebted to Mr. Miers for an opportunity of 

 describing this species, which was collected by him during his 

 residence in Brazil. It will be observed, from the figures of the 

 maxillae, that the inner lobe in both sexes is armed with an acute 

 curved spine, which would remove it from the section of the 

 family in which the genus is placed by Burmeister. 



Sp. 11. Scleroslomus femorahs. (PI. XII. fig. 9 a, 9 6.) 



Dorcxis femoralls , Guerin-Meneville, Rev. Zool. 1839, p. 303, (de- 

 scriptio trivialis, structura insecti omiiino neg- 

 lecta). 



Lucanus rubripes, Hope, Cat. Lucan., p. 26; Burmeister, Handb. 

 d. Ent. V. p. 424 {Sclerostomus r.) 



This interesting species from the Straits of Magellan is placed 

 by Burmeister as one of the two species of his first section of 

 the genus Sclerostomus — his other species being the L, Darwinii 

 of Hope, which is so closely allied to the former that they are re- 

 garded as probable varieties of one species. Hence there seems 



VOL. III. N.S. PART VI. OCT. 1855. P 



