136 Mr. R. E. Turner on some neto or 



finely and closely punctured, very prominent anteriorly, and 

 almost toothed at the lower angle; a very deep groove 

 between the pro- and meso|)leiirae for the reception of the 

 anterior femora. The anterior tibiae are produced beneath 

 into a compressed carina which is very deeply and narrowly 

 incised before the middle. Median segment shorter than the 

 pronotum, broadened and obliquely truncate posteriorly, 

 closely punctured, the sides of tlie segment delicately aci- 

 culated. Abdomen broader than the thorax, closfdy punctured, 

 with rather long greyish pubescence on the sides ; the first 

 segment narrowed and truncate at the base; the second 

 punctured rugose, with a low transverse carina near the base 

 and the apical margin slightly raised ; tiie pygidium narrow 

 and convex, with a low, median, longitudinal carina, a small 

 elongate-ovate truncation at the apex, the carina continued 

 on the surface of the truncation almost to the apex. All the 

 ventral segments are rather closely punctured. 



Fuscous, the legs fusco-ferruginous, the front of the head 

 fulvous. The tarsal ungues are bluntly toothed near the 

 base. 



Length 9 mm. 



Ilah. S. Australia!?). 



Type in B. M., purchased in 1867, apparently from Bake- 

 well's collection. 



I place this peculiar species in Ariphron with doubt. The 

 sculpture of the abdomen is more like Tachynomyia, but in 

 the excavated pronotum, the prominent mesopleurae, and the 

 shape of the head it is much nearer Ariphron. The re- 

 markable form of the anterior tibiae seems to be peculiar to 

 the species, but they are not normally formed in A. bicolor 

 or A. tryphonoides. In try phonoides there is a prominent 

 projection on the anterior tibire above near the base. 



Tachynomyia adusta, Sm. 



Thijnnus adustus, Sm. Cat. Hvm. B.M. vii. p. 43. n. 122 (1859), ?. 

 jElurits pilosulus, Sm. Cat. Hjm. B.M. vii. p. 56. n. 10 (1859), J. 



Several pairs taken in copula by Mr. G. A. Waterhouse at 

 Killara near Sydney early in October. 



Tachynomyia vidpitia, Sm. 

 JElurus vulpinus, Sm. Cat. Hym. B.M. vii. p. 54. n. 7 (1859), J . 



In my revision of the group (Proc. Linn. Soc. N. S.W. 

 xxxii. p. 286, 1907) I gave this as a synonym of T.mcerens, 

 Westw. A further examination has convinced me that the 



