146 REVISION OF THE THYNNIDjE OF AUSTRALIA, II., 



ventral segments with the apical angles prominent, fifth ventral 

 segment with a very long and acute spine on each side at apical 

 angles. Epipygium truncate at apex; hypopygium ending in 

 three spines, those at the apical angles very short. Black; 

 clypeus, a spot at base of mandibles, margins of pronotum, a 

 large spot on mesopleurse, tegulse, a spot near posterior margin 

 of mesonotum, a spot on middle and one at each of anterior 

 angles of scutellum, a spot on each side at base of median seg- 

 ment near middle and one on each side on the extreme margin 

 not far from apex, a narrowly interrupted band near apex of 

 first abdominal segment, a broader transverse spot on each side 

 of segments 2-5 above, a smaller spot on each side of segments 

 2-4 beneath, undersurface of spines of fifth segment, and a mark 

 at apex of anterior femora pale dull yellow; tibiae and tarsi fusco- 

 ferruginous. Wings hyaline, nervures black. Length 14 mm. 

 Hob.— Nickol Bay, W.A. (Clement). Type in Brit. Mus. 



73. T. (Aeolothynnus) eyrensis, n.sp. 



(J. Clypeus produced and strongly narrowed anteriorly, forming 

 an elongate beak, narrowly truncate at apex, with a median, 

 longitudinal carina on apical portion, depressed at base and 

 punctured. Labrum prominent and almost pointed at apex. 

 Head rather small, very finely rugulose. Thorax and median 

 segment very finely and closely punctured, pronotum broadly 

 emarginate anteriorly, rather long and quite as broad as head. 

 Scutellum rather narrowly truncate at apex; median segment 

 subtriangular, very narrow at apex, with a depression on each 

 side near basal angles. Abdomen elongate, first segment oblique, 

 not quite as wide at apex as second; segments 2-4 with a depressed 

 transverse line near base, and the apical margin very narrowly 

 depressed. Beneath there is a raised plate on segments 2-6, 

 strongly emarginate and produced at apical angles, forming 

 acute spines on segments 4-6. H} T popygium broad and short, 

 with an apical spine and an acute, slender spine on each side 

 close to apex. Black; clypeus, internal margin of eyes broadly 

 to above base of antennae, a spot on each side above base of 



