372 On (lie Tabaniiiae of the Family Tabanidae. 



brown. Legs reddish yellow, the posterior tibire and tarsi 

 dark brown. Wings hyaline, the fore border brown, the baud 

 beginning from near the apex, crosses the fork of the third 

 vein, and becoming narrower crosses the apex of the discal 

 cell and ends in the fifth posterior cell ; the a])ex of the anal 

 cell and its interior border arc brown. 

 Length l^ mm. 



DlTYLOMYlA, Bigot. 



Ditt/Iomyia, Big.^t, Rev. et Mapr. Zool. (2) xi. p. 305 (1850^; id. Cat, 

 Orieut. Dipt. (1891) ; Wulp, Cat. Dipt. S. Asia, p. 63 (1896). 



This genus was formed for one species from Ceylon, which, 

 however, on examination, proves to be a specimen of Gas- 

 troxides, Saunders, a genus in the division Pangoninse : see 

 Kicardo, Ann. & Mag. Nat. Hist. (7) viii. pp. 289, 297 (1901). 

 (G. ater, ? , Saunders, /. c. pi. v. fig. 4 ; ^ , Saunders, I. c. 

 &c., should read thus, not as printed on page 298.) 



Gastroxides ornata, $ , Bigot. 

 Ditylomyia ornata, 5 , Bigot. 



The type, by the markings of the wings and the general 

 shape of the abdomen, bears a general resemblance to Gas- 

 troxides ater (Saunders), the only heretofore known species 

 of the genus. Bigot mentions the presence of ocelli, but did 

 not note the spines on the hind tibia?, tliese two characters 

 dividing the division Pangoninse from Tabaninse. The 

 antennse have only five rings on the third joint, not eight or 

 nine as he supposes. In the shape of the head, the insertion 

 of the antennie, and the presence of the tubercles on the 

 forehead it resembles G. ater, but is larger and of diffca-ent 

 colouring. 



Black, with lighter hind borders to the segments of the 

 abdomen. 



Face blackish, with grey tomentum, the tumid triangular 

 projection in the middle shining red-brown ; the palpi large, 

 flat, as long as the proboscis, dark brown with black hairs. 

 Forehead black, shining, with two prominent tubercles, one 

 situated near the antennae, the other about in the middle of 

 the forehead, neither reaching the sides ; vertex reddish ; the 

 yellow ocelli are placed on a brownish, no^ very prominent 

 tubercle bordered with grey which is continued along the 

 sides of the forchtad. Antennie h nger than the head, red- 

 brown, the long spine or tooth brighter red ; the first joint 

 stout, long, the second only half as long, both with black 

 pubescence; the third joint twice as long as the first, its 

 first ring as long as the remaining four together, stout, 

 bearing the long spine at its base, the second ring is the 



