Genera and Species ofT\.\\yA\\\<\-x. 7 



oi- lor most pnrt, and liiuil niargius of sonic at least of 

 pi reeding segments eream-bnff ; venter light grey or more 

 or less ercam-l)iiiV, without a dark longitudinal stripe. 

 Uiiiys : costa as far as stigma, auxiliary and first longitudinal 

 vein to same point, third longitudinal vein i)et\veen anterior 

 transverse vein and fork, and portion of fifth longitudinal 

 vein from base to fork bntt", veins elsewhere for most [)art 

 (hiik brown. Squanue waxen white. JIalteres: stalks 

 eream-bulf, knobs ivory-white. Lfcjs clothed with whitisii 

 hair ; uiulcr side of front fcniora shining, more or less dark 

 brown in ^ , bud-yellow in $ ; claws black, buff or cream- 

 huff at base. 



Zanzibar and German East Africa (Usambara) : type of ^ , 

 type of redeseription of ? , and eight other specimens 

 (^ <S S , '^ ? ?), l"''oni Pigaduli, Zanzibar, 14. vi. 1911, 

 "on sandy bank"; 3 ? ?, same locality, 28. v. lUll, " on 

 sandy bank" ; 3 ? ? , same locality, 10. xi. lUlO, " numerous 

 on sand"; 1 ?, same locality, "l2. xi. 1910; IS, 1 ?» 

 Bububu, 7. xii. 1910 : all collected and presented by Dr. W. 

 M. Aders. 



AVriting to the author on June 26, 1911, Di-. Aders 

 remarked that the species described above had been "found 

 almost exclusively in one place, generally on a hot, sandy 

 bank where cattle are buried." Dr. Aders added that the 

 cadavers of the cattle seemed to possess a great attraction 

 for these flies. No information as to the blood-sucking 

 powers of Adersia oestrdides has yet been received, although 

 )t may be mentioned for what the obsei'vation may be worth 

 that natives in Zanzibar assert that the species bites *. The 

 peculiar coloration of the body and wings, which in the case 

 <;f the body is most marked in the female sex, recalls that of 

 other Diptera inhabiting sandy or desert regions, and is 

 doubtless protective when the insects are resting on sand. 



Genus Khinomyza, Wied. 



Rhinomyza mordosa, sp. n. 



? . — Length (10 specimens) 7 to 8"G mm. ; width of head 

 2'2 to 2*6 mm. ; width of front at vertex 0"25 mm. ; length 

 of proboscis I'o to 1-8 mm.; length of wing 7-25 to 8-25 

 mm. 



Small, narroxv-hodied species, allied to Kh. maculata, Snrcouf 



* From iuformation supplied to the writer in conversation, 12. vi. 19]], 

 bj- Dr. A. Copland, "A-lio brought home a portion of the material collected 

 by Dr. Aders. 



