LEPTOGESYS. 53 



61. Leptogenys falcigera, Roger, Eerl. ent. Zeit. v (1861), p. 41, . 



$ . Black, the mandibles, antennae and legs castaneous red, the 

 apex of the abdomen ferruginous, the head anteriorly and the apex 

 of the abdomen with a few scattered ferruginous hairs ; pubescence 

 almost wanting, only in certain lights a microscopic silvery pile 

 can be observed, most dense along the 

 margins of the prothorax. Head : the 

 mandibles smooth, almost cylindrical, the 

 apices crossing in front, clypeus bordered 

 anteriorly by a very narrow testaceous 

 membrane, and armed with an acute tooth 

 on each side close to the base of the 

 mandibles ; scape of the antennas re- 

 markably stout, reaching beyond the top 

 of the head, 2nd joint of the flagellum 

 longer than the 1st or 3rd. Thorax more 

 closely and coarsely punctured than the 

 head or abdomen ; legs smooth. Node 



,.,. x of pedicel rounded above, truncate an- 

 Leptogenys fa^gera, . 



long ; abdomen longer than the thorax, the 2nd segment longer 

 than the 1st and with a broad, shallow, but plainly visible trans- 

 verse sub-basal groove. 



Length, 7'5 mm., including the mandibles ; mandibles 2 mrn. 



Hob. Ceylon (Terbury 4" Green)-, Madagascar (after Forel). 



02. Leptogenys pruinosa, Forel, Jour. Bomb. N. H. Soc. xiii (1900), 

 p. 304. 



. Very closely resembles L. falcigera, but the head, thorax 

 and abdomen are not punctured, but covered with a dense hoary 

 pruinosity, giving the insect a greyish sandy appearance. Black, 

 the mandibles castaneous red, the apex of the tibiae, the tarsi and 

 apical segment of the abdomen dull ferruginous yellow. The 

 mandibles are slightly shorter and less curved than in L. falcigera ; 

 the produced medial portion of the clypeus is more broadly rounded 

 at the apex, and the testaceous membrane bordering its anterior 

 margin is broader ; the node of the pedicel is narrower in front 

 than posteriorly, and distinctly longer than in L. falcigera, being 

 as long as broad or longer. Abdomen : the 2nd segment without 

 the broad transverse groove, the extreme bases of the segments 

 when drawn out highly polished and shining. 



Length, 6'5-7'5 mm., including the mandibles ; mandibles 

 barely 2 mm. 



Hob. Ceylon, Kandy (Bingkam). 



