250 REVISION OF 11115 THYNNID.B OF AUSTRALIA, I., 



I do not regard the group as sufficiently distinct to merit full 



generic rank. 



Key to the Species of Lepteirone. 



^ S^.\. Head large, produced behind the eyes, not appreciably 

 narrowed posteriorly, 

 A. Abdomen light ferruginous. An interrupted yellow line on 

 the vertex. 

 a. Black, clypeus and anterior margin of the prothorax yellow. 



L. arenaria, n.sp. 

 ii. Head not produced behind the eyes, more or less narrowed 

 posteriorly. 



A. Abdomen light ferruginous. 

 a. Prothorax yellow. 



a2. A spot on the mesothorax and the scutellum yellow. 



L. 7'ufopicta Sm 

 62, Mesothorax and scutellum black entirely, L. caroli, n.sp. 



h. Margins of the prothorax yellow, 

 a^. An interrupted line on the vertex and the postscutellum 



yellow. L. suhacta, n.sp, 



c. Anterior margin of the prothorax only yellow. 



L. ichneiimoniformiti Sm, 



B. Abdomen with the basal segments ferruginous. 



a. Three basal abdominal segments ferruginous. L. comes, n.sp. 



h. Four basal segments ferruginous, except the base of the first. 



L. jyseudosedula , n.sp. 

 •C. Abdomen black. 



a. Legs and antennae ferruginous. L. fallax Sm. 



b. Basal half of flagellum of antenna?, femora and tibige 



ferruginous. L. cuhitalU, n.sp. 



c. Wholly black. 



a^. Slender, finely and rather sparsely punctured. L. ojiaca, n.sp. 

 &2, More robust, more closely and strongly punctured. L. triatis Sm. 



:$ $ . A. Head nearly square. 



a. Median segment considerably broadened from the base, 

 a 2. Without a depression near the posterior angle of 



the prothorax. L. ichneumoniformis Sm. 



&2_ With a slight depression on each side near the angles 



of the prothorax. L. cubit alls, n.sp. 



b. Median segment very slightly broadened from the base. 



L.. fcdlax Sm. 

 B. Head much longer than broad. 



a. Median segment with a delicate median carina. L. subactrt, n.sp. 



