iQii.] G. RiCARDO : Revision of the species of Tabanus. 153 



(N. Acta. Reg. Soc. Upsaliensis, ix, 53 — 62, 1827), recorded as from 

 China and Cape of Good Hope, was probably a specimen of Tabanus 

 striatus, or of Tabanus taeniola, P. B., from the Cape, or Thunberg 

 may have had specimens of both species before him, the African and 

 Indian species being ver}^ nearly related, but distinct; the frontal 

 callus alone would divide them, but his description is not full enough 

 to make it possible to decide ; the species may well be deleted from 

 the list of Tabanus species. See Bezzi, '' Nomenkiatorisches iiber 

 Dipteren" in Wien. Ent. Zeit., xxvii, vol. ii and iii (Feb. 

 1908). 



Tabanus costalis, Lichtenstein, Catalogus, p. 213, Hamburg 

 (1796); Austen, Ann. Mag. Nat. Hist. (8), i, p. 346 (1908); from 

 Coromandel. This species, described in under a dozen woids and 

 absolutely indeterminable but apparently thought by the author 

 to be near Tabanus striatus, should be deleted from the list of 

 species of Tabanus. 



Tabanus hilaris, a* 9 , Walker. 



Ins. Saund. Dipt. , p. 40, pi. ii, fig. 3 (1850). 



In Brit. Mus. coll. ; the type cf from India, others from the 

 Punjab and N. W. India. 



In Indian Museum coil, cf and 9 specimens from Bhogaon, 

 Purneah district, N. Bengal, ''resting in numbers on tree trunks 

 during the day, common in the evening on the stomachs of cows " 

 (C. A. Paiva). In Howlett coll. '^ and 9 specimens from Belgatchia 

 and Pusa, Bengal, others sent for determination came from vSylhet, 

 Assam. 



A species distinguished from T. striatus, F., by the short median 

 stripe of abdomen which does not begin till the third segment and 

 by the shorter lateral stripes which usually terminate on the third 

 or fourth segment. The frontal callus is ver}- similar in shape, 

 shining red-brown, rather protuberant with a spindle-shaped exten- 

 sion, the forehead almost the same width throughout. The palpi 

 shorter and stouter. Legs darker, the femora being all blackish 

 or reddish brown. In colouring the abdomen is blackish 

 brown with the stripes grey. The thorax with two stripes which 

 fade away on the anterior border. The males are similar, in the type 

 the abdomen is more reddish brown than black. Eyes in males 

 with a broad band of very large facets, leaving the lower half of 

 eyes and a narrow border continued to the vertex composed of 

 small facets; across the yellowish large facets is a well-marked 

 broad brown band. 



Length of male specimens 11} mm., of females 14 mm. 



Tabanus abbreviatus, 9 , Bigot. 



Mem. Soc. Zool. France, v, p. 670 (1892). [Atyloins.\ ? Aty- 

 lotus conicus, & , Bigot, /. c, p. 650. 



