388 GERTRUDE RICARDO. DIPTEREN II. 



Tabanus recusans Walker. 



„ rubriventris Macquart. 



„ serus Walker. 



„ sonnerati Bigot = dorcicus Wlk. • 



„ sylvioides Walker. 



„ yulcnsis Rôder. 



Tabanus ccylonicus Schiner, is now added to the above List, and the descriptions of 

 thirteen new species. 



They may be divided into the following groups. Seè RlCARDO Records Indian Muséum. 



Group I. Forehead with no callus. Group IV N°. VI p. 113 (191 1). 



Group II. Forehead with one square, narrow, or oblong callus, which is ahvays prolonged 

 towards the vertex by a more or less narrow line. Groups VII, VIII, IX, X. 

 Group IV. 



Tabanus leucopterus v. d. Wulp. 

 Group VIL Abdomen with one or more continuous stripes. 

 Tabanus cohaerens Wlk. 

 „ designatus n. sp. 



Group VIII. Abdomen with médian or latéral spots or both on abdomen, not usually 

 forming a continuous stripe. 



Tabanus exigeas Wlk. 

 „ laetus de Meijere. 

 „ albithorax n. sp. 



„ divisus n. sp. 

 „ semicircularis n. sp. 



Group IX. Abdomen with paler bands and sometimes spots. 

 Tabanus indistinctes Bigot. 

 „ sylvioides Wlk. 

 ,. aurivittatus n. sp. 

 „ metallicus n. sp. 



Group X. Abdomen unicolorous or almost so, sometimes darker at apex. 

 Tabanus breviusculus Wlk. 



„ ceylonicus Schiner. 



„ doreicus Wlk. 



„ extricans Wlk. 



„ insurgens Wlk. 



„ papuinus Wlk. 



„ raffrayi Bigot. 



„ recusans Wlk. 



„ rubriventris Macquart. 



„ séries Wlk. 



„ yulensis Rôder. 



„ denticulatus n. sp. 



!> fulgidus n. sp. 



., il lus tris n. sp. 



„ lorcntzi n. sp. 



„ novae guineensis n. sp. 



„ pollinosus n. sp. 



„ 7coollastoni n. sp. 



