IQII.] G. RiCARDO : Revision of the species of Tabanus. 



143 



Tabanus vanderwulpi, 9 a» , Osten Sacken. 



Berlin. Ent. Zeit., xxvi, p. 97 (1882); nee pictipennis, V. d. 

 Wulp. 



One female in Brit. Mus. coll. from the Philippines. 



This species is very nearh' related to Tabanus flexilis, Wlk. 

 Osten Sacken thought it identical with Tahamis pictipennis, v. d. 

 Wulp (which is undoubtedly' the same as the Walker species), and 

 renamed it as above, the first name being preoccupied. His re- 

 production of van der Wulp's description is not given here as he 

 made additions to it to suit his specimens from the Philippines, 

 I & and 4 2 . Judging from the specimen in the Brit. Mus. coll. 

 the female differs from Tabanus ftexilis, Wlk., in the following 

 particulars : — 



Antennae black at apex. Forehead about half as wide an- 

 teriorly as it is at the vertex and fully ten times longer than it is 

 broad, the frontal callus longer and narrower, very little wider 

 than its lineal extension. Abdomen brownish red with the yellow 

 posterior bands narrower, produced in the middle as triangular 

 spots, but the under side is darker with black and yellow bands. 

 Legs black or dark brown with black pile as Osten Sacken des- 

 cribes, but in this specimen the femora have some yellow hairs, 

 the fore coxae same colour as breast. Length 21 mm, 



cf . According to Osten Sacken' s description the e^^es have 

 large and small facets very sharpl}' divided. 



Group VI. 



Forehead with one square or narrow or oblong callus, always 

 prolonged towards the vertex as a more or less narrow line, usually 

 nine to ten times as long as it is broad (in Tabanus auriflamma 

 Wlk., however, it is much broader). Large species, 18 — 23 mm. in 

 length, with the wings coloured brown or ^''ellow or both, usually 

 clear at extreme apex and sometimes in the discal cell, never 

 forming regular bands. 



Tabanu^ speculmn , Wlk., from Celebes will belong to this 

 group. 



Tabanus pratti, $ , n. sp. 



Type 9 in Brit. Mus. coll. from Kelanton, Malacca (pur- 

 chased from H. Rolle, 1904); and another female from Sarawak 

 (A. R. Willington, 1908). Presented London School Tropical 

 ^ledicine coll. In the latter collection is one female from Batu 

 Tiga, Selangor (Pratt). This very handsome black species is 

 distinguished by the bright orange-red pubescence on face and 

 sides of breast ; the beard is also the same colour. Abdomen black 

 with white-haired bands at sides. Wings dark brown. Tibiae whitf 

 at base. Length of type 24 mm., the other female 23 mm. 



