of some New Species of Exotic LucanidcB. 205 



having only a 3-)ointeil club, whereas it is distinctly 4-jointe(l. 

 the basal joint of the club being even slightly longer than the 

 following. The labrum is small, oblong, slightly porrected. In 

 fig. 1, the head is purposely represented raised in front, to show 

 the labrum extended between the base of the mandibles ; in fig. 

 1 a, the setose extremity of the labrum is shown rather too much 

 deflexed, its natural position in repose being to rest upon the in- 

 ternal flattened base of the closed mandibles; it is strongly punc- 

 tured, bristly, and armed at each interior angle with a thick fas- 

 cicle of setae. This, 1 presume, is the part described by M. L. 

 Fairmaire as " I'epistome, presque perpendiculaire, en forme de 

 languette, legerement creuse en cuilliere a son extremite, qui se 

 termine par une petite pointe;" — a description not applicable to 

 the female, being probably made from the male. The maxilla, of 

 which M. L. Fairmaire gives no description, are, in the female 

 (fig. 1 U), armed with a curved hook at the extremity of the inner 

 lobe; the male, as in the Lamj)rimce, &c., have this part most 

 probably unarmed. The lower lip and its appendages, also un- 

 desciibed by M. Fairmaire, are especially interesting, as disagree- 

 ing with that of the majority of the family, the lobes of the labium 

 and the base of the labial palpi arising from the extremity of the 

 mentum (fig. 1 c). The pro- and meso-sternal processes (fig. 1 d) 

 are simple. 



M. L. Fairmaire, without noticing the above peculiarities, upon 

 which the relation of the groups of Lucanldce are so greatly de- 

 pendent, has, with great tact, asserted the relation of the genus 

 Streptocerus with the Australian Lamprimce, with which, indeed, 

 it agrees in the porrected labrum and labial palpi, and uncinated 

 maxillae of the female ; it especially, however, differs from that 

 genus in the distinct and porrected labrum, 4-jointed club of the 

 antennae, and other characters. In the distinct labrum, and in 

 the porrected labium and labial palpi affixed at the apex of the 

 mentum, the genus also approaches Sinodendron, which, in these 

 respects, is thus proved neither so exceptional nor so far removed 

 from the terminal Lucanidce as is indicated by Professor Bur- 

 meister in his table of the family (Handb. d. Ent. v. p. 315). 



Sp. 7. Sclerostomus hastatus. (Plate XI. fig. 2.) 

 Obscurus, capite piceo, pronoto elytrisque subcastaneis, his 

 costis duabus castaneo-rufis nitidis instructis, sutura fas- 

 ciaque transversa submedia nigra notatis ; mandibulis elon- 

 gatis compressis, apice digitato, 4-denticulatis, prothoracis 

 angulis anticis extus dilatatis (mas). 



