72 Major F. J. Sidney Parry on 



Eyes (with the exception of the genus Mesotopus) not 

 divided by a can thus. 



Chiva of antenna; variable (4, 5, or 6-jointed), the cha- 

 racter of the loatiets variable, but strongly produced in 

 Imcanus and the allied genera, moderately so in Hexar- 

 thrius. 



Clypevs prominent, and diversiform. 



Anterior t'dncG straight, the four posterior tibiae of the 

 females invariably armed, and in Mesotopvs, Lueamis, 

 and Pseiidolucaims, the tibiaj are in both sexes exter- 

 nally pluri-dentate, in h'ha-tns and TJc.iarthrius the inter- 

 mediate tibiae of the males are always unidentate, but in 

 the posterior this character is most inconstant, never 

 exhibiting more than a very minute tubercle, which is 

 often found to be both visible and invisible, in the same 

 species. 



In their normal condition (var. max.) they attain a 

 considerable size, and with the exception of two species 

 {Ilcxarthrius Tarry i and //. DcyroUii) are unicolorous. 



Pseudolucanus Mazama. (PI. I. fig. 1.) 



Dovcus Mazama, Leconte, Proc. Acad. Nat. Sci. Phil. 

 1861, p. 345; Parry, Tr. Ent. Soc. 3rd ser. ii. 51. 



The distinguished American Entomologist Dr. Leconte, 

 on his recent visit to London, very kindly placed in my 

 hands for examination, two very interesting insects 

 indigenous to North America, described under the names 

 of D. Mazama, Leconte, and D. hrevifi, Say, the former 

 from Northern Mexico, and the latter from Now Jersey. 

 Both species were in my former Catalogue included in 

 the genus Dorcus, but the first of the two proves un- 

 doubtedly upon examiuation to be a Lucanus, as hitherto 

 accepted. The form of the prothorax, and the character 

 of the mandibles, which are short, strongly curved, and 

 unidentate, resemble the rare European species L. Bar- 

 harossa. Fab. ; in the latter respect it equally assimilates 

 to Lucanus afrafus, Hope, from Nepaul, and L. caiircolus, 

 Linn., from North America. 



The late Mr. Hope has, in his Catalogue, imposed 

 on the two species capreolus and atraius, the generic 

 name Tseudolncavus, and would, without doubt, have 

 included L. Barharossa, Fab., had he been acquainted 

 Avith it (the insect mentioned in his Catalogue as be- 

 longing to his collection not being the true Fabrician 

 species) , and he thus characterizes Pseudolucanns , " Caput 



