120 LUCANID^. 



Type in the Hope Dept., Oxford. 



D. bulhosus has the closest resemblance to D. polymorphus 

 but the males can be separated without difficulty by the 

 difference in the minute clypeal process. 



52. Dorcus perplexus. 



Cladognathus perphxus Parry,* Proc. Ent. Soc. Lond. 1862, p. Ill ; 

 Trans. Ent. Soc. Lond. 1864, p. 26 ; op. cit. 1870, p. 82. 



(J. Very dark brown, with the head and the sutural region 

 of the elytra black or chestnut-red, with the antennae and tarsi 

 black, the mandibles and tibise dark red, and the outer margins 

 of the head, pronotum and el^'tra, as well as the sutural margins 

 of the last, more or less darkened. Elongate in shape and dull 

 above and beneath except in the region of the el}i}ral suture. 

 The head is densely granular, flat, with a strong curvilinear 

 emargination in front, the clypeal process very small, simple 

 and tongue-like. The front angles of the head are obtuse, 

 the sides oblique in front and feebly angulate behind the 

 eyes. The mandibles are triangular, with the outer margin a 

 little concave, the inner edge nearly straight, with strong 

 blunt serrations almost from base to tip. The j^^'onotum is 

 finely and densely granular, very opaque at the sides but less 

 so in the middle. The front angles are blunt, the lateral 

 margins not serrate, gently rounded in front, obtusely angulate 

 behind the middle and straight from there to the rounded 

 hind angles. The scutellum is finely ])unctured. The elytra 

 are closely and minutely ])unctured and opaque except near 

 <;he suture. The prosternal process is vertical in front and 

 a little compressed. The Z^grs- are fairly slender, the front 

 tibia finely serrate externally and with very minute teeth, 

 the terminal fork short, the middle tibia with a minute lateral 

 spine, the hind tibia without spine. 



Length (with mandibles), 25-27 mm. ; (without mandibles) 

 20-23 mm. : breadth, 9-10 mm. 



" India." 



Type in the Oberthiir collection. 



Only specimens of small size are at ])rescnt known of this 

 species but it is probable that a higher degree of develoj)ment 

 will be found to occur. Parry has mentioned female specimens 

 in the British Museum but I have found none that can be 

 referred with any certainty to D. perplexus. The above 

 descrijition is taken from the unique male type and a rather 

 larger but otherwise exactly similar male in the British Museum. 

 The exact habitat of both is unknown, but the latter is from 

 the East India Comjmny's collection. The species may prove 

 to be Indo-Chinese, as a female sjiecimen perhaps belonging 

 to it has been sent to me from Tonkin b^' M. de Cooman. 



