SOME BLOOD-SUCKING AND OTHER DIPTERA FROM THE ANGLO-EGYPTIAN SUDAN 



61 



will readily be recognised by aid of the figures on this page. It may lie characterised briefly 

 as follows : 



$, ?.— ^. (11 specimens), length 16i to 20 mm. 



?. (26 specimens), length 18 to 21^- mm. ; wing expanse of largest $ 44 mm. 



T.J.e.TERZ. 



Fig. 26.— Tadanus biguttatis, Wied. <^ 



Cape Colonj' to the Sudan, Abyssinia, and Aden 



Deep black ; abdomen with two cream-coloured spots ; wings, except tips, dark brown. 



« J £ TTKZI — 



Fig. 27. — Tabanus biguttatl's, Wied. ?. 



Deep black ; front, face, jowls and dorsum of thorax clothed with golden-yellow or whitish-yellow hair ; spot on thorax black ; 



nth and 6th segments of abdomen with yellowish hair at sides ; wings as in S . 



Deep black; ^ icltli two ereai/t-cohvtreJ spots^ clotlted irtfJt }jeUoiris]i ha'u\ one heldnd 

 file other on Jorsinn of ahclomen in median Hue; ^ with front (apace hetween eiiea)^ /'"'>', 

 jowls (part of head heneatli eyes)^ and dorstnn of thorax clothed with qoJden-ijeUow or vhitish 

 i/elloic Itai)'^ irith an inverted cordt/fe jn/tch of black hair on dorsnn/ of tliorax in median 

 line ; in both sc'es leqa blacky and icinf/s except their apices (distal fmrth or fifth) whollt/ 

 dark hroirn. 



