360 ]\Iis3 G. Ricaiclo on the Tabaninre 



■widely brown tliau in D. fvrrn(jalii<i^ but the stigma is 

 yellow, not brown, and the veins yellow ; the legs arc also 

 paler, the base of the hind tarsi white besides those of the 

 middle tarsi, as stated by Wiedemann. 



Diachlorus bivittatus, Wiedem. 



This species is easily distinguished from D. ferrugatus, to 

 which it is very similar in general appearance and colouring, 

 by the dark stripes on tlie abdomen, and the dark brown of 

 the wing is not so extended at the apex. 



Female type, Chrijsops inorno/us, Walker, from Brazil. 



One female from Rio de Janeiro, 4. 7. 99 [Dr. Lutz), 

 presented by C. B. Rhind, Esq. 



Diachlorus scutellatus, ? , Macq. 



One female from British Guiana [Lov)), 1901. 



The scutcllum, described by Macquart as red or yellow, is 

 so densely covered with grey tomentum that it appears grey, 

 as does also the base of the thorax; there are traces of 

 yellow pubescence on the grey colour; otherwise this specimen 

 agrees with Macquart's description. 



Stibasoma, Schiner. 



Stibnxoma, Schiner, "\'erh. zool.-bot. Ge.-ellsch. Wien, xvii. p. 810 

 (J867) ; id. Keise Novara, p. 93 (1866); Ost. Sackeu, IJiol. Centr.- 

 Am., Dipt. i. p. 57 (188G). 



This genus is distinguished by the short, stout, strongly 

 arched abdomen and the dilated curved fore tibiae, which 

 serve to separate it from Tabanm ; the shape of the antennge, 

 with the third joint furnished with a tooth, and the absence 

 of metallic scales or colouring distinguish it from Sclasoma 

 and Lepidoselaga. It was formed for Tabanna thcotcenia, 

 Wiedem., and all the species, except one from N. America, 

 belong to S. America. 



The described species number six. 



S. theotcenia, $ , Wiedem., Au?8. zweifl. Ins. i. p. 136 (1828) ; Walker, 

 List Dipt. pt. V. Suppl. 1, p. 200 (18 ">4) {Tnhanus) ; Schiner, Keise 

 Isovara, p. 94, pi. ii. ti<r. G (1866) ; Williston, Kans. Univ. Quart, iii. 

 p. 194 (1895). — Montevideo, Brazil. 



S. fukohirtuin, $ , Wiedem. I. c. p. 155; Walker, List Dipt. pt. v. Suppl. 1, 

 p. 150 (Tabnnus); Schiuer, Keise Kovara, p. 94 (1866); Ost. 

 Sacken, Biol. Centr.-xVm., Dipt. i. p. 57 (1886). [Tabanus com- 

 pactum, 2 ' Walker, /. c. p. 222.]— Brazil, Amazons. 



S. tristis, 5, Wiedem., /. c p. 164; Walker, /. c. p. 200 {Tahanm); 

 Schiner, Keise Novara, p. 94 (1866).— Brazil. 



