354 Miss G. Ricardo on the Tabaninse 



For remarks on the relationship of this genus to Lepido- 

 sdaga see under the latter. 



It is distinguished by its short, flat, metallic-coloured 

 abdomen, thickened fore tibiae, and simple third joint of 

 antennae. 



S. tiliale, S ? , Fabr. Syst. Antl. p. 102 (I8O0) ; Wiedem. Dipt. Exot. i. 



p. 89 (1821); id. Auss. zweiH. Ins i. p. 164 (1828) (Tabanus); 



Macq., Dipt. Exot. i. (2) p. 187 (1838) ; Walker, List Dipt. pt. v. 



Suppl. 1, p. 273 (1854) ; Iliider, Wien. ent. Zeit. xi. p. 237 (1892). 



[^Hadrus chahjbetnn, Pertj, Del. Anim. Arctic. Brasil. p. 183, 



pi. xxxvi. fig. 20 (1830). Iladrus ci/aneum, Walker, List Dipt. i. 



p. 208 (184S).]_Brazil. 

 S. cyaneum, $, Wiedem., Auss. zweifl. Ins. i. p. 152 (1828) (Tabanus) ; 



Macq., Dipt. Exot. i. (2) p. 188 (1838); Walker, List Dipt. pt. v. 



Suppl. 1, p. 273 (1854). — Locality unknown. 



The antennae and legs were both wanting when described 

 by the author ; he speaks of it as being a steel-blue insect 

 with hyaline wings. 



Selasoma tibiale, (J ? • 



One male from Oajaca, Mexico, 58. L35 ; one female 

 from Mount Roraima, British Guiana, 3500 feet (Quelch), 

 99, 68 ; one female from Brazil, 45. 56, presented by 

 Mrs. T. P. G. Smith ; two females from unknown localities. 



Udenocera, gen. nov. 



This genus is nearly related to the two South-American 

 genera DiacJdorus , Ost. Sack., and Acanthucera, Macq., and 

 is formed for a species from Ceylon which bears a general 

 resemblance to the latter genus, but is distinguished from it 

 by the absence of a tooth on the third joint of the antennae, 

 which also divides it from Dichelacera, Macq. It is distin- 

 guished from Diachlorus by the length of the first joint of 

 the antennae, which is nearly as long as the third joint, and 

 by the altogether longer slender antennae, the third joint 

 being cylindrical; the fore tibiae are neither curved nor 

 broader; these differences, together with the presence of a 

 tubercular projection situated more than halfway down the 

 face on which the antennae are placed, seem to justify the 

 formation of a new genus. 



Generic characters. — Antennse long, cylindrical, with no 

 tooth or projection on the third j )int; the first joint is quite 

 two thirds the length of the third joint, the second more 

 than half as long as the first joint, the third joint has the 

 first division as long as the four last divisions together, the 



