348 



(dorso-ventral), the cheeks rounded; antennae inserted in 

 centre of face; sculptured like the thorax. Thorax densely 

 reticulate-punctate, including the propodeum ; parapsidal 

 furrows one-half complete from anteriorly; scutellum simple; 

 propodeum moderately long, but without- a distinct neck, 

 noncarinate, but with straight spiracular sulci. Petiole finely 

 reticulate, over twice as long as hind coxae ; body of abdomen 

 short, pointed at apex, convex above and beneath, glabrous ; 

 segment 3 longest; occupying one-half of surface, distinctly 

 longer than 2, the following very short. Fore wings ample ; 

 broad ; hyaline ; postmarginal vein a little shorter than the 

 marginal and twice as long as the rather long stigmal. Both 

 mandibles strongly 4-dentate. Antennae 13- join ted, with two 

 ring and three club joints ; pedicel about as long as f unicle 1 , 

 which is one-third longer than wide, 6 quadrate; first club 

 joint slightly the longest; quadrate; ring joints small, 

 transverse. 



Hob. — Queensland: Gordonvale (four females bred from 

 the bean-fly, Agromyza phaseoli, in stems of cow-pea, 

 August, 1915, A. P. Dodd ; also three females labelled, 

 "Parasite of Bean-fly, Darwin, N.T., 5/5/15, G. F. Hill.") 



Type. — A female on a tag, antennae and head on a slide. 



Waterstone, 1915, has described a species of this genus, 

 rugosa, parasitic on the same host in Ceylon, but bearing 

 heterodont mandibles. 



Pterosema subaenea, n. sp. 



9 . Length, 1*75 mm. Head and thorax very dark 

 metallic-green, almost black, the abdomen aeneous-green; 

 coxae concolorous, also the femora, rest of legs golden-yellow; 

 antennal scape yellow, the rest black. 



Head large, transverse, a little wider than the thorax; 

 viewed from in front distinctly wider than long ; densely 

 reticulate in raised lines; mandibles strongly 4-dentate. 

 Thorax densely reticulate-punctate, the propodeum more 

 densely so; stout; pronotum very short, its latero-anterior 

 angles prominent and subacute ; scutum much wider than 

 long ; parapsidal furrows one-half complete from anteriorly ; 

 scutellum large, simple ; axillae sharply declivous ; propodeum 

 short, transverse, with a short abbreviated median carina, 

 and short incomplete lateral carinae which curve and continue 

 towards meson for some distance; spiracles small, no spiracular 

 sulci. Petiole slender, as long or a little longer than hind 

 coxae; body of abdomen slender, pointed conic-ovate, no 

 longer than head and thorax united ; somewhat convex above, 

 straight beneath ; segment 2 occupying less than one-third 

 of surface, 3-4 subequal, combined fully as long as 2, 5-6 



