TQii.] O. RiCARDO : Revision of the species of Tabanus. 127 



fore femora darker. Wings tinged 



yellow on fore border . . uniformis, n. sp. 



87. Abdomen dusky reddish brown or 



reddish yellow. Forehead about 

 a third narrower anteriorly than 

 at vertex, frontal callus pear- 

 shaped . . . . . . stibhirtiis, Ricardo. 



Abdomen olive-coloured. Forehead 

 about half as narrow anteriorly as 

 it is broad at vertex, frontal callus 

 very narrow . . . . formosiensis, n. sp. 



88. Medium sized species. Abdomen 



yellowish with darker apex. Palpi 

 yellow. Legs reddish yellow, the 

 fore tarsi darker. Forehead seven 

 times as long as it is broad . . tuhercidatus , n. sp, 



89. Small species. Legs black, tibiae 



white. Eyes with cross-bands . . 90. 



90. Reddish brown or yellowish species. 



Beard white or yellow. Palpi 

 usuall}^ pale. Forehead ten times 

 as long as it is broad , . simplissinms , Wlk. 



Black, sometimes reddish brown 

 species. Beard black. Palpi black- 

 ish. Forehead eight times as long 

 as it is broad . . . . ceylonicus, Schiner. 



Group XI. Therioplectes. 



91. Forehead with two transverse calli. 



Subcallus bare and shining. Ab- 

 domen black with white-haired 

 bands . . . . . . suhcaUosus, n. sp. 



Forehead with one callus. Sub- 

 callus not bare or shining . . 92. 



92. Frontal callus black, club-shaped, 



with spindle-shaped extension. 

 Abdomen black, reddish yellow at 

 sides of first two or three seg- 

 ments. Palpi stout with short 

 apex. Appendix usually present. 

 Legs black and reddish yellow . . hirtus, Wlk. 

 Frontal callus small, indistinct. Ab- 

 domen blackish, onl^^ reddish on 

 second segment. Palpi slender 

 with long acute apex. No appen- 

 dix to wing . . . . 93. 



93. Smaller species. Legs black and red- 



dish yellow . . . . ivyvillei, n. sp. 



