350 Miss G. Ricardo on the Tabaninse 



8. Antennse long, the third joiut cylindrical, 



situated on a projecting tubercle Udenocera, g. n. 



Antennpe not very long, the third joint 

 not cylindrical, not situated on a pro- 

 jecting tubercle DiacJilorns, Ost. Sacken 



[Diabasis, Macq.]. 



9. Abdomen short, stout, very convex .... Stibasoma, Schiner. 

 Abdomen not short, stout, or very convex. 10. 



10. Antennae long and slender, the iirsl joint 



long Acanthocera, Macq. 



Antenna} not very long and slender, first 

 joint not long 11. 



11. Species of a slender build, usually with a 



banded thorax and abdomen, third joint 

 of antennjc slender, mostly with brown 



markings on the wings Dichelucern, Macq. 



Species of a stouter build, third joint of 

 antennai stout Tubanus, L. (in sens. lat.). 



Hexatoma, Meig., Syst. Beschr. ii. p. 83 (1820). 

 Heptatoma, Mcig., Illiger's Mag. ii. p. 267 (1808). 



Hexatoma pelhicens, S ? . Fabr., Gen. Ins. Mant. ii. p. 308 

 (1770) {Tabanus). 



Tahanus albipes, Schrank, Ins. Austr. p. 480 (1781). 

 Heptatoma bhnaculata, Meig., Klass. zweifl. Ins. i. p. 150, pi. ix. 

 figs. 5-10 (1804). 



For the full list of references see ' Katalog Palaarktisclien 

 Diptera/ Bczzi, vol. ii. p. 54 (Budapest, 1903). 



One male and one female from Germany, 58. 80 (Ruthe). 



One female from Prussia, 4. 6. 92 (Kh'bi/). 



Two males and one female from unknov\u locality. 



Dasybasis, Macquart. 



Dast/lasis, Macq., Dipt. Exot. Suppl. 2, p. 25 (1846) ; Loew, Dipt. 

 Sudafrik. p. 31 (1860). 



This genus was formed for one species from Australia, and 

 Bigot describes another from Chili. I have no knowledge of 

 either. 



The genus is distinguished by its hairy eyes, the hairy first 

 two joints of the antennae in the male, and by the presence 

 of only four divisions on the third joint, with no tooth or 

 angulation, but slightly swollen in the middle. 



D. appendiculata, S $ > Macq., I. c. pi. i. fig. 1 ; Walker, List Dipt. pt. v. 



Suppl. 1, p. 267 (1854).— Australia. 

 D. trislis, J, Bigot, M^m. See. Zool. Fr. v. p. 621 (1892).— Chili, 



