356 FORMICID.E. 



Hob. A very variable species, spread in one form or other 

 throughout our limits, and extending through the Indo-Malayan 

 region to New Guinea. 



Var. baccJius, Smith, is reddish, with the head and abdomen 

 more or less fuscous. 



Var. fuscitliorax, Forel (loc. cit.\ is very dark brown, with the 

 coxae and base of the femora yellow. 



Var. comottoi, Emery (Ann. Mus. Civ. Gen. xxiv (1887), 

 p. 513, $ & <J>), and var. dulcis, Emery (loc. cit. xxvii (1889). 

 p. 571, ), are pale varieties found in Burma ; and lastly, var. 

 crassinodis, Eorel (loc. cit.), which is not uncommon in Burma and 

 Tenasserim, is of a very dark chestnut-brown colour, shining, with 

 longer and somewhat denser erect pilosity, and the node of the 

 pedicel thick and conical. 



407. Camponotus dichrous, Forel. 



Camponotus maculatus, Fabi:, race diclirous, Forel, Still. Soc. 

 Vaud. Sc. Nat. xvi (1879), p. Go ; id. Jour. Bomb. N. H. Soc. 

 vii (1892), p. 432. 



$ maj. Head and 3rd and following segments of the abdomen 

 pitch-black ; flagellum of the antenna?, thorax, legs and basal 

 two segments of the abdomen yellow, the latter with sometimes 

 brown markings ; the thorax anteriorly shaded with brown. 

 Head triangular, the lateral occipital angles very prominent ; 

 mandibles with 7 teeth ; clypeus carinate, with a median anteriorly 

 produced rectangular lobe, as in C. compressus. Thorax an- 

 teriorly narrowed into a collar ; legs long and rather slight, tibia? 

 compressed and feeblv longitudinally carinate. Node of the 

 pedicel not so thick as in C. compressus : abdomen oval, not broader 

 than the head. 



min. Similar, much smaller and more slender, the head 

 narrower posteriorly than in front, the occiput compressed. 



Length, maj. 9-11 ; min. 5-6'5 mm. 



Hab. The Himalayas to 6000 ft. ( Wood-Mason, Sage 4" Moller). 



Forel has described a lighter-coloured and slightly larger variety 

 as var. kattensis The species resembles C. vwiec/atus, Smith, but 

 is structurally different. 



408. Camponotus thraso, Forel. 



Camponotus maculatus. race thraso, Forel. Join: Bomb. N. H. Sec. 

 vii (1S93J, p. 432, $ . 



$ maj. Very dark castaneous, almost black, very minutely re- 

 ticulate-punctate, shining; pubescence almost absent (or abraded), 

 reduced to very scanty scattered erect hairs. Head rectangular, 

 as broad posteriorly as in front : clypeus carinate, with a very 

 short lobe, its anterior margin transverse : mandibles moderately 

 broad, the teeth abraded or obsolete ; antennal carinae short, 

 moderately close together, divergent posteriorly. Thorax some- 

 what depressed in front, strongly compressed posteriorly ; pro- 



