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



have been described before ; it has a general resemblance to Aty lotus 

 rusticus, L., but is distinguished from it by the shape of frontal 

 callosities and b}' its black antennae. 



A small species with greyish black abdomen reddish at sides 

 of first two segments, clear wings, yellow legs, broad forehead with 

 two transverse callosities, and black antennae. Length a' type 

 12 mm., 9 type 13 mm., other females 13 — 15 mm. 



Face covered with whitish tomentum and thick silvery white 

 pubescence, with a yellowish bro^^'n band above between the 

 antennae and eyes. Palpi stout, short, ending in a point, white with 

 white pubescence. Beard silvery white. Antennae black, a character 

 which distinguishes it from other species of the same group, the 

 first two joints with some gre^'ish brown tomentum and black hairs, 

 the third joint broader at base but with hardly a perceptible tooth, 

 only an angle, with some gre}^ tomentum on the basal part of joint. 

 Subcallus and forehead covered' with gre34sh tomentum, the latter 

 hardly three times as long as it is broad, and a third narrower 

 anteriorly, the frontal callus large, transverse, almost reaching the 

 e^-es, convex, black, shining, with its posterior border towards 

 vertex irregular, the median callus is the same colour but smaller, 

 not reaching the e3'es, irregular in shape, in the type broken up, 

 but in others heart-shaped, the pubescence of forehead short, yellow, 

 scanty, thicker towards the vertex. Eyes with apparently one 

 band starting from the frontal callus. Thorax blackish covered 

 with grey tomentum, stripes indistinct. vScutellum the same. 

 Abdomen narrow, blackish with grey tomentum, the first three 

 segments reddish yellow at the sides, so that the blackish colour 

 appears only as a median stripe, on each side round grey tomentose 

 spots appear, and also as narrow median ones on the black colour, the 

 segmentations and sides of abdomen reddish yellow, pubescence 

 white at sides and on segmentations, black at apex, but alwa^'s 

 scant}' ; under side paler, yellowish, covered with grey tomentum. 

 Legs yellow, fore tibiae at apex and tarsi blackish, middle tarsi with 

 the last four joints brown, the posterior tarsi almost wholly brown, 

 femora with some whiti.sh pubescence. Wings clear, veins brown, 

 no appendix or only the root of one. stigma yellow, very narrow 

 and small. 



(f . Similar , the thorax and abdomen more pubescent , the former 

 with yellowish pubescence, the scutelluni with long white hairs on 

 posterior border, the abdomen with chiefl}' whitish yellow pubescence. 



Eyes large, bare, the large facets yellowish, very distinct, the 

 smaller ones black, continuing to vertex as a narrow border, no 

 stripe is visible. One male measures 16 mm., the reddish yello^\■ 

 colour of abdomen is more extended in the males. 



Tabanus polygonus, cr- $ , Walker. 



Ivist Dipt., v, vSuppl. i, ]). 237, 357 (1854); Ricardo, Ann. Mag 

 Nat. Hist. (7), xvi, p. 20 r (T005). 



