igii.J G. RiCARDO ; Revision of the species oj Tabaiius. 167 



forehead like mouth of a horse [sic), greyish white, the abdominal 

 dorsal stripe white. Wings hyaline. Length 12 lines. Habitat 

 in Java, hostile to cattle. Doleschall, I.e., p. 407. 



It is doubtful whether it will ever be possible to identify the 

 species from this description ; the figure proves the description was 

 from a female, but otherwise is of little use. 



Group VIII. 



Forehead with one square, narrow, or oblong callus always 

 prolonged towards the vertex as a more or less narrow line ; four 

 to ten times as long as it is broad. 



Species with median or lateral spots or both on abdomen, not 

 usually forming a continuous stripe. The subgroup represented 

 by Tahanus jumifer, Wlk., contains species distinguished by very 

 narrow foreheads and frontal calH, usually reddish brown or red- 

 dish yellow in colour : this is the most difficult group in the Oriental 

 Region, the species being very nearly allied, and apparently dis- 

 tinguished by small , often variable characteristics ; they are rather 

 large or medium-sized species. Tabanus siguifer, Wlk., is the 

 type of a small subgroup easily distinguished by their prominent 

 large abdominal pale spots. 



Tabanus ruftventris, Fabr. , jcldcriy. d. Wulp. and Icucosparsus , 

 Bigot, are not included in the table being unknown to me. 



Tabanus triangularis, V. d. Wulp, in the Austro-Malay Fauna, 

 must be nearly related to Tabanus brunnens, Macq. , but the legs 

 must be lighter judging from the description. 



Tabanus amaenus, a* , Walker. 



list Dipt., i. p. i6j (1848). 



Tabanus clausacclla, a" , Macquart, Dipt, exot., Suppl. v, p. 

 45 (1855)- 



Tabanus administrans, cf , Schiner, Reise der Novara Dipt., 

 p. 83 (1868). 



Tahanus signatipennis, 9 , Portschinsky. Horae vSoc. Entom. 

 Ross., xxi, p. 180 (1887). 



Bcllardia sinicus. 9 . Bigot, Mem. vSoc. Z00I. France, v, p. (rzq 

 (1892). 



The description of Tabanus clausacella is as follows:— Black. 

 Thorax with ashy grey pubescence. Abdomen with red segmen- 

 tations, the second segment testaceous at the sides. Antennae 

 with the third joint testaceous at the base. Tibiae white, with tlu- 

 apex black. Wings with first posterior cell closed. 



Length 6 lines, c^ . Palpi of a yellowish white. Face, beard 

 and forehead white. Antennae : the two first joints and the small 



