364 Records of the Indian. Museum. [Voi<. lY , 



each antenna may be said to be surrounded by a tuberculous 

 base, the forehead is narrow, about three times as long as it is broad 

 anteriorly above the tubercle, at vertex about half as broad as it 

 is anteriorly. Thorax blackish brown with traces of grey tomen- 

 tum, with some appressed yellowish pubescence, and scattered 

 black hairs on dorsum, thick at sides which with shoulders are 

 lighter in colour. Sctitelltmi similar to thorax. Abdomen yellowish 

 brown with some grey tomentum, with appressed yellowish pubes- 

 cence and some short black pubescence, sides with yellow hairs ; 

 under side similar. Legs reddish yellow, pubescence on femora 

 chiefly yellowish white, yellow and black on tibiae and tarsi. 

 Wings hyaline with the usual neuration of Tabanus species, short 

 appendix present, fore border narrowly tinged yellow, veins yellow. 



DIACHLORUS, Osten Sacken. 

 Diachlorus flavipennis, 5 , Macquart. 



Dipt. exot. Suppl. iv, p. 339 (1850). 



Thorax black. Abdomen red, with the apex brown. Anten- 

 nae and legs red. Wings ^^ellow, unspotted. Length 4I lines 2 . 

 Palpi pale yellow. Face with whitish tomentum, sides shining 

 black, as well as the forehead. Antennae pale fawn coloured. 

 Thorax (denuded) shining black, traces of whitish tomentum, a 

 fawn-colcured spot at base of wings. Abdomen shining (denuded), 

 rather narrow and elongated ; the three first segments dark fawn 

 coloured, with a dorsal brown stripe ; the four others black with 

 fawn-coloured segmentations ; under side black with grey tomentum 

 and fawn-coloured segmentations. Legs fawn coloured ; posterior 

 femora blackish. Wings a little 3^ellowish, at base and on outer 

 iDorder yellow ; neuration normal. 



From the Philippines. M. Bigot. Macquart, Dipt. exot. 

 vSuppl. iv, p. 339. 



Subfamily PANGONINAE. 



Hind tibiae with spurs. Ocelli usually present. 



The following table is drawn up for those genera only which 

 are represented in the Oriental Region : — 



1. Third joint of antennae with eight or at least seven divi- 



sions. Proboscis usually prolonged . . . . 2 



Third joint of antennae with five divisions. Proboscis 



short . . . . . . • ■ 3 



2. Proboscis long. First posterior cell of wing open. E^^es 



hairy . . . . Diatomineura, Rond. 



Eyes bare . . Subgenus Corizoneura, Rond. 



3. P^irst and second joints of antennae short • . 4 

 First and second joints of antennae long . . 7 



