19. Polyrhachis chaonia ^HNS.

P. niger, pube pallide aurea vestitus; thorace bidentata; petioli squamula bidentata; femoribus tibiisque fer-rugineis; alis fusco-hyalinis.

Female. Length 4 lines. Black, and clothed with a cinereous pubescence, which has a pale golden lustre, particularly on the head and thorax; that on the abdomen is more inclining to grey, but has a golden tint in some lights; the mandibles black. Thorax armed in front with two short acute spines; the legs ferruginous, with the tarsi black; wings fusco-hyaline, nervures testaceous. Abdomen globose; the scale of the peduncle with two short stout spines. (Pl. I. fig. 18.)

Hab. Gilolo.