140 Records of the Indian Museum. [Vol. IV, 



gre3dsh ; last segments of the abdomen darker ; their hind margins 

 yellowish, with small triangular, white, dorsal spots; on the under 

 surface the pale margins of the segments are broader. Legs and 

 halteres fulvous ; the femora and the whole front legs fuscous. 

 Wings at the base brownish yellow, in the middle with a rather 

 broad brownish cross-band, which issues on the stigma and em- 

 braces the discal cell, but does not quite reach the hind margin ; 

 the costal cell is yellow. This species seems to be not uncommon 

 in the Sunda Islands ; it is represented in the Leyden Museum by a 

 & from vSumatra (v. Lansberge), 2 9 from Java (Blume and Ludeking) 

 and 4 9 from Borneo (Miiller) ; it was a long time ago designated in the 

 collection by the late Mr. Snellen van VoUenhoven under the 

 name equestris, n. sp., without having been described. The species is 

 related to my species Tahanus pictipennis (Tijd. v. Ent., xi, p. 100, 

 1868) , the name of which having been used before, is changed by 

 Osten Sacken into Tahanus vandcrwulpi (Berlin Ent. Zeit., xxvi, 

 p. 97, 1882) ; it differs, however, by its fulvous posterior legs, its 

 more slender antennae, the third joint of which is darker, and by 

 the pattern of the wings, showing instead of two cross-bands, 

 but a single one which passes over the discal cell. Notes Leyden 

 Museum, vii, p. yj , 31, pi. v, fig. 6, 1885. 



Tahanus pictipennis is the same as Tahanus fiexilis, Walker, a 

 species from Celebes, but not the same as Tahanus vandcrwulpi. 

 The forehead against the general rule is slightly wider anteriorly, 

 about a third, and is five and a half times as long as it is wide, the 

 frontal callus small, pear-shaped, with a linear extension. The 

 legs have the fore tibiae obscurely reddish N^ellow on their basal half, 

 the extreme apices of other tibiae and all tarsi blackish. The cross- 

 band of wing in the description, said not to reach the hind border 

 of discal cell, does so in the figure and in these specimens. 



Tabanus non-optatus, 9 , n. sp. 



Type cf from Purneah District, in Indian Museum coll. 



Type 9 from unknown locality and two males in Brit, Mus. 

 coll. from unknown localit^^ 



This species is very nearly allied to Tahanus optatus, Walker. 

 The female t^'pe is so similar to the male type, and the two males 

 identical with latter, that I think it is safe to assume that the speci- 

 mens with no locality specified came from India or an adjacent 

 region, especially as the species with banded wings are not very 

 numerous in the African or Oriental Region, and probably not in 

 any fauna. 



This species is distinguished from the Walker species by the 

 almost wholly yellowish abdomen, only becoming darker on the 

 last two or three segments, and the pale spots are larger, more 

 triangular in shape, the abdomen is longer and more conical in 

 shape, and the forehead in the female is not narrower at the 



