GNAPHALORYX. 77 



1^. The head is short, broad and flat, the posterior punctured 

 area very sht)rt. The ocular eantluis is rather strai<^ht and 

 anguhir and the post-oeular lobes are strong but very bhiut. 

 The mandibles are widely separated at tiie l>ase, not very long, 

 feebly curved externally, and generally bear three snudl teeth 

 internally. The clyi)eal ])roeess is very short and brcjad, 

 with the outer angles produced forward. Tiie [)ronotuni is 

 dilated in front and the angles pro(hiced outwards, narrow 

 behind, with very blunt angles. The elytra very finely and 

 densely punctured. The front tibia is straiglit, the lateral 

 teeth are minute and the prongs of the terminal fork strongly 

 hooked. The middle tibia bears a miimte lateral spine and 

 the hind tibia has none. 



Variation of the male. In small males the head is not very 

 broad and the post-ocular process is feeble. The mandibles 

 are scarcely as long as the head ; there is a small blunt tooth 

 close to the base, another above and just beyond it and a 

 third close to the tiji. In larger specimens the head is broader, 

 the post-ocular process more prominent but very blunt. The 

 number of mandilndar teeth remains constant, the second 

 becoming only a little more prominent. Lengthening of the 

 mandible usually occurs between the second and third teeth, 

 so that in large examples there is a wide gap before the terminal 

 fork ; but the lengthening may occur between the first and 

 second teeth, the latter remaining close to the terminal fork. 

 This seems to occur most commonly in the Andaman Islands 

 and the name andamanus has been applied to the phase, 

 although it is found in many other localities and perhaps 

 wherever G. opacus is to be found. 



J. Length {with mandibles) , 17-35 mm. ; (without mandibles) 

 lG-28 mm. : breadth, 0-5-12-O mm. 



9. Length, 18-27 mm. ; breadth, 7-12 mm. 



Andaman Islands. Nicobar Islands. Malay Penin- 

 siiLA. Tonkin. Philippine Islands. Sumatka. Java. 

 BoKNEo. Molucca Is. : Batchian, Waigeou. 



Type probably in the Halle Museum. 



Genus DORCUS, 



iJorcus Macleay, Hone Ent. ISIO, p. Jll : J^iuoidaire, Gen. Col. 



iii, 185G, p. 27 ; Arrow. Truns. R. Ent. Soc. Lond. Lxxxiii, 1935, 



p. 109. 

 Liicanii.s «iibg. Mctopodoiilufi Hope & Westw., Cat. Luc. Col. 1845, 



pp. 4, 3U. (Type, savagei Hope.) 

 Lucanus subg. Frospocoilvs, id., lo". n't. (Type, cavifrons Westw.) 

 Lticantis subg. (\i/cloph(liai)»iis, id., op. cit. p. 5. (Type, 



jyhiti/cepJidlii.s Ho})e.) 

 LucfDiuf! subg. Macrognntliiis. id., op. cit. pp. 5, 31. (Type, 



ijirajja Oliv.) 

 Lucanu.s subg. Plalyprosopus, id., oji. cit. pp. (i, 31. (Type, titutms 



Boisd.) 



