300 Miss G. Rlcartlo on tlie Tabanluai 



widely brown than in D. ferrugatua, but tlie stigma is 

 yellow, not bi'own, and the veins yellow ; the legs are 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. femiqntus, to 

 which it is very similar in general appearance and colouring, 

 by the dark stripes on the abdomen, and the dark broAvn of 

 the wing is not so extended at the apex. 



Female type, Clirysops inornatus, Walker, from Brazil. 



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

 presented by C. B. Rliind, Esq. 



Diachlorus scutellatus, $ , Macq. 



One female from British Guiana (Low), 1901. 



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

 so densely covered with grey tomcntum 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. 



Stihasnma, Schiner, "^'erh. zool.-bot. Gefcllsch. Wien, xvii. p. .'^10 

 (J807) ; id. Keise Novara, p. 93 (1866); Ost. Sacken, IJiol. (Jentr.- 

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



This genus is distinguished l)y the short, stout, strongly 

 arched abdomen and the dilated curved fore tibia3, which 

 serve to separate it from Tahanns ; the shape of the antennae, 

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

 of metallic scales or colouring distinguish it from Selnsoma 

 and Lepidoselaya. It was formed for Tabanus theotania, 

 Wiedem., and all the species, except one from N. A.merica, 

 belong to S. America. 



The described species number six. 



S.theotmna, 5 , Wiedem., Auss. zweifl. Ins. i. p. 13G (1828); Walker, 

 last Dipt. pt. V. Suppl. ], p. 200 (18o4) {Tdhanus) ; ISc-liiner, Keise 

 Novara, p. 94, pi. ii. tiy:; (1806) ; Williston, Kans. Univ. (^Uiart. iii. 

 p. 194 (1895).— Monte'Video, Brazil. 



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

 p. 150 {Tahanvs); Schiner, Keise Novara, p. 94 (1866); Ost. 

 Sackeu, IJiol. Centr.-Am., Dipt. i. p. 57 (1886). [Tahcmus com- 

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



S. tnBti.% $, Wiedem., /. f. p. 164; Walker, /. c. p. 200 {TahauuK) ; 

 Sc-hinor, Beise Novara, p. 94 (18(56).— Brazil, 



