294 MR. R. E. TURNER ON THE [Feb. 15, 



beyond the dorsal, without any constriction at the base. First 

 joint of the intermediate tarsi slender ; tarsal ungues small, 

 bidentate. 



Entirely castaneous brown, varying in darkness according to 

 the age of the specimen. 



Length 10-11 mm. 



Hob. Claremont, W. A. (H. M. Giles). J $ in cop. December. 

 2 J . 2 $ . 



Allied to L. vigilans Sm. 



Lestricothynnus (?) TENUATUS Sm. 



Thynnus (Agriomyia) tenuatus Sm. Cat. Hym. B. M. vii. p. 31 

 (1859), J. 



Thynnus {Lophocheilus) tenuatus Turn. Proc. Linn. Soc. N.S.W. 

 xxxiii. p. 173 (1908), S . 



$ . Clypeus without a carina. Head subopaque, very minutely 

 and closely punctured, the cheeks and vertex shining and almost 

 smooth, with a short and obscure longitudinal frontal sulcus, more 

 than half as broad again anteriorly as long, the posterior angles 

 strongly rounded. Pronotum sparsely punctured, with a row of 

 large setigerous punctures on the anterior margin, broader than 

 long and slightly narrowed posteriorly. Scutellum sparsely 

 punctured. Median segment shorter than the scutellum, very 

 minutely and closely punctured, broadened from the base and 

 steeply sloped posteriorly. First abdominal segment concavo- 

 truncate anteriorly, the dorsal surface shining and sparsely 

 punctured, the apical margin raised slightly, with a narrow groove 

 before it ; second segment with about eight more or less irregular 

 transverse carina?, including the raised apical margin, the carina? 

 at the base much lower than those at the apex ; segments 3-5 

 finely and rather closely punctured, delicately aciculate at the 

 base, narrowly smooth at the apex ; fifth ventral segment coarsely 

 longitudinally striated. Pygidium not very narrow at the base, 

 vertically truncate posteriorly, with arched carina? above the base 

 of the truncation, the surface of the truncation ovate, narrowly 

 truncate at the apex, and with four strongly raised arched carina? 

 on the basal half. The intermediate tibia? are thickened and 

 spinose, but the basal joint of the intermediate tarsi is not un- 

 usually broad. 



Fusco-ferruginous, the second, fourth, fifth, and apical segments 

 of the abdomen almost black. 



Length 11 mm. 



Hob. South Perth, W. A. (H. M. Giles). <$ $ in cop. 

 November. 



" On Leptospermum bloom. Very rare.''" (Giles.) 



The female seems more nearly allied to crtcdelis Turn, than to 

 any other, although the male is without spines on the sixth 

 ventral segment. It does not seem to be well placed either in the 

 Agriomyia or Lophocheilus groups. 



