BY ROWLAND E. TURNER. 143 



tinged with yellow, nervures black, stigma ferruginous. Length 

 14mm. 



9. Head smooth and shining, strongly convex, narrowed 

 anteriorly, rather broader on posterior margin than long; eyes 

 small and round, situated at some distance from base of mandibles, 

 with which they are connected by a carina, antennae close together 

 at base, clypeus with a carina from base to apex. Pronotum a 

 little broader than head, broader than long and slightly narrowed 

 posteriorly, opaque, with a longitudinal median carina produced 

 into an acute tubercle posteriorly. Median segment narrow at 

 base, shining, flattened above and smooth, obliquely truncate 

 posteriorly and shallowly punctured. Abdomen shining, very 

 finely and sparsely punctured; first segment slightly depressed 

 on apical margin; second segment with three strong transverse 

 carinas in middle and several delicate transverse striations before 

 apical margin, which is very slightly raised. Pygidium vertically 

 truncate posteriorly, the sides parallel and slightly raised, 

 truncate at apex, more than twice as long as broad; epipygiuui 

 very much shorter than hypopygium. Fifth ventral segment 

 rugose. Black; mandibles, antennae and legs fuscous; abdominal 

 segments testaceous on sides. Length 8 mm. 



Hab. — Cape York, Q. (Turner; $Q in cop.). 



The labrum of the male is longer than in most of the genus 

 and is moderately bilobed. The female has the tarsal ungues 

 bidentate. 



70. T. (Aeolothynnus) bidentatus Sm. 



Thynnus (Agriomyia) bidentatus Sm., Cat. Hym.B.M. vii.p.32, 

 n.82, 1859(<J). 



(J. Clypeus not very much produced, rather broadly truncate 

 at apex. Thorax and median segment closely and shallowly 

 punctured, most finely on median segment, which is rounded. 

 Abdomen shining, segments 2-5 divided by an impressed trans- 

 verse line, the apical margins very narrowly depressed, leaving a 

 raised, curved mark, deeply emarginate in middle, just before 

 apex. Ventral plates of segments 2-5 deeply emarginate, slightly 



