368 Miss G. Kicardo on the Tabaninse 



belonging to this genus are the following ; they all have a 

 tooth on the third antennal joint : — 



Tahanus pachypalpis, 2 . Bigot, Mem. Soc. Zool. Fr. v. p. 631 (1892). 



A large species. — Mexico. 

 Tahanus japonicus, $ , Bigot, /. c. A. smaller species. — Japan. 

 Tabanus satanicus, j , Bigot, I. c. A species with a dark red sciitellum 



and brownish wings. — Brazil. 

 Tahaims castaneus, $ , Bigot, /. c. The antennae are broken off. — Brazil. 

 Tabanus marmoratus, 5 , Bigot, I, c. p. 633. These seem identical with 



T. albopictus. — Brazil. 

 Tabanus albo^ncf.us , $ , Bigot, I. c. The wiugs have a brown band and a 



square brown spot on the fork of the third vein. — Brazil. 

 Tabanus peruvianus, $, Bigot, /. c. The wings have an irregular band. 



— Peru. 



The species described by Bigot as Dichelacera longirostris, 

 ? , is a species of Sllvius not previously described under this 

 latter genus. I propose to redescribe it as 



Silvius longirostris, $ . 



Dichelacera longirostris, 5; Bigot, Ann. Soc. Entom. Fr. (3) vii. p. 128 

 (1859). 



There are two females from Madagascar, either of which 

 may have been Bigot^s type. I have based my redescription 

 on the one marked 35. 



This species will come under those with a long tooth -like 

 projection on the third joint of the antennse after S.pertusus, 

 LoeWj in my table of species of Silvius from tlie Ethiopian 

 Region (Ann. & Mag. N. H. 1901, viii. p. 295), thus :— 

 Brown. Legs dull yellow. Wiugs clear. 



A brown species with clear wings and a rather long pro- 

 boscis. 



Face greyish yellow, shining brown under the antennae, 

 some silvery hairs bordering the eyes. Palpi long, yellow, 

 with black pubescence ; the proboscis as long as the anterior 

 femora. Antennse yellow, the third joint redder, becoming- 

 darker towards the apex; the first joint twice as long as 

 the second, both with black pubescence ; the tooth of the 

 third joint is long, reaching the first of the annulations, 

 curved, with fine hairs on its outer edge ; the last ring is the 

 longest of the four, ending in a point. Forehead reddish 

 brown, narrow, consisting of a raised ridge along the whole 

 length, the ocelli situated on it at the vertex. Thorax yel- 

 lowish with four brown stripes; the sides and breast greyish 

 with a few yellowish hairs ; the scutellum brown. Abdomen 

 brown, pale yellowish in the centre of the first segment and 

 along the anterior border of the second segment ; this paler 

 colour appears on the other segments under the dark colour 

 on the anterior border; the underside pale yellow, with some 



