236 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, 1890. 



Liacos (Triliacos) analis, Saus. and Sich. Cat. Spec. Geu. Scol., 

 p. 33, 1. 



Scolia penangensis, Sauss. Mel. Hym., p. 39, 17, $ var. 



Scolia erythrosoma, Burm. Mon. Scol., p. 15, 1 ; Smith., Cat, Hym. 

 Ins. Brit. Mus. iii., 113, 134. 



Liacos {Triliacos) erythrosoma, Sauss. and Sich., Cat. Spec. Gen. 

 Scol., p. 35, 2. 



Habitat : India, Burma, Malay Archipelago. 



Female: Length 10 lines; expanse 18 lines. 



Male : Length 9 lines : expanse 16 lines. 



This species is an almost exact miniature of Triscolia rubiginosa, 

 which apparently is common all over India. 



Unlike any other species of the family known to me, T. dimidiata 

 is often found swarming in considerable numbers round the stumps 

 of decayed trees from December to February. On one occasion in 

 the end of February I caught some thirty specimens in about a quarter 

 of an hour. They were circling round the foot of an old stump 

 in a field by the side of the road, and one sweep of the net would 

 take in three or four specimens. From the circumstance that all I 

 caught were males, I thought it possible that they were attracted, 

 as some species of butterflies are, by the presence of a concealed 

 virgin female, but a diligent digging and search in the ground 

 round the stump resulted in nothing but the driving away of the 

 swarming males. 



Family Pompilid^e, Leach. 



5. POMPILUS BRACATUS, n. sp. 



Habitat : Burma. 



Female : Length 8 lines ; expanse 15 lines. 



Male : Length 8 lines ; expanse 14 lines. 



Description : $ Head dark ferruginous red, tips of the man- 

 dibles, a small patch round the ocelli, and the apex of the antennae 

 dusky black ; the clypeus convex, nearly twice as broad as long, its 

 anterior margin fringed with ferruginous hairs. Thorax, the pro- 

 thorax, a square macula on the posterior portion of the mesothorax, 

 the posterior margin of the scutellum, and the Avhole of the post- 

 scutellum ferruginous red, the rest of the thorax black with a silky 



