^Gus. 177 



the sides are scarcely prominent behind the eyes. Tlie man- 

 dibles are of simple falcate shape. The puncturation diminishes 

 with increase of size, disappearing first from the inner half of the 

 elytra and at a later stage from the pronotum. In medium- 

 sized examples, tlie front of the head is more produced above 

 the excavation, its sides are more i)romineut behind the eyes 

 and a small internal tooth appears before tlie middle of the 

 mandible. In large specimens the head is smooth and dull, 

 with a short triangular process in front, widest behind the eyes, 

 where it is roughly i)unctured, the pronotum is also smooth and 

 dull, except for a few punctures in the marginal groove, and the 

 el\4ra are smooth and shining except at the sides. The front 

 angles of the pronotuni are obliquely truncate. The mandibles 

 may reach a length nearly twice that of the head and the tooth 

 is found near tlie middle in the largest specimens, but before 

 it in smaller ones. 



O. Length (with mandibles), 14-36 mm. ; (without man- 

 dibles) 13-26 mm. : breadth, 5-5-12-0 mm. 



$. Length, 17-21 mm. ; breadth, 7-5-l(> mm. 



Bengal : Mankidoania, Sunderbans (C. /'. C. Beeson, Feb.). 

 Burma : Rangoon {E. T. Atkimon). Tonkin. Malay 

 Peninsula. Sumatra. Borneo. Philippine Is. 



Type in the British Museum ; also co-t\-pes of ^gus nitidus 

 Boil. 



This and the next two si)ecies are particularly difficult to 

 define, on account of the remarkable changes, dci)ending upon 

 their size, to which the males are subject. They are all very 

 closely related to jrEgus acumimitus F. They may even be 

 found ultimately to be local races of that species. 



94. ^Egus kandiensis. (Plate XXII, figs. 12-14.) 



^gus kandiensis Parry, Trans. Ent. Soc. Lond. 1864, p. 53 ; op. 

 cit. 1870, p. 61, pi. 2, figs. 5 & 8. 



Black, very smooth and shining in large males, or with the 

 head and pronotum ojjacjue, entirely dull and opacjue in females 

 and small males, with a clothing of minute erect setae and some- 

 times with a covering of grey adherent earthy matter in the 

 female. The legs clothed with short jiale hairs, the middle and 

 hind tibiae bearing two or three small lateral spines. The body 

 a little depressed and the base of the pronotum straight and 

 distinctly narrower than the elytra. 



$. Oval in shape, with the upper surface closely sculptured 

 and duU. The head is very coarsely and rugosely punctured 

 and the front part of the ch-peus is concave. The mandible 

 has a strong truncate tooth near the middle. The jyronotum 

 is rugosely punctured, niore finely and densely at the sides 

 than in the dorsal part . The front angles are bluntly produced , 



N 



