SOME BLOOD-SUCKING AND OTHEE DIPTERA FEOM THE ANGLO-EGYPTIAN SUDAN 53 



segment on both sides with a pale grey bloom ; long brassy yellow hairs on the margin of 

 the first. Hypopygium ashen-grey. Legs pale yellow, with blackish-brown coxie ; tips of 

 femora and tibise, brown ; on the anterior legs this brown colour is reduced, and on the 

 femora there is frequently only a ring or a spot on the under side. Front tarsi entirely 

 blackish-brown ; tarsi of the hinder pairs of legs from the second or third joint onwards, as 

 also the tip of the first joint, browii. Posterior tibia and first tarsal joint somewhat expanded. 

 There is scarcely any trace of hair on the legs, and in the same way a whiter coloration on 

 the tibiae is only very feebly indicated. Wings hyaline, the anterior veins pale yellow. 



" $. Thorax entirely ashen-grey, with a coat of pale brassy yellow felt-like hair on the 

 dorsum, on the anterior portion of which three fine browii lines appear in addition, whereby 

 are marked oif two admedian grey longitudinal stripes. The abdomen, too, is entirely ashen- 

 grey, and covered with a thick coat of pale yellow felt-like hair. In other respects there are 

 no further differences from the male." 



Family TABANID^, (Seroot-Flies, &c.) 

 Genus Chrysops, Meigen 

 Clirynops distinctipeiiids, sp. nov. 

 (Plate IV.) 



$. (7 specimens), length 81 to 10 mm. 



Black; nhdoineii dull oUve-(j)rii, dlrrry-iirey on ba»al anijlcK, hind iminjins of sajmenta Chrysops 



,, . , T 1 } T 7 ■ 7 • 7' • ; • 7 distinctipennis 



suvery or yellowish, a Idav/c median blotch not reaching kind inaryiii on each of the neyments 



except the last : legs ochraceous, with front tarsi, tips of all femora, distal fourth to distal half 



of front tibial, and last three joints of middle and hind tarsi brown; coxa- and / rochctnters 



liliicli ; brown trnnsversf hand on winij not touchituj fork of third vein, and, near lund nnn-ijui 



with a semi-clear space in J ourth ami ff til posterior cells; stigma orange-ochriiceons ; costal 



border before it brownish. 



Head : shining black, with a cinereous polliuose stripe on each side, from middle of front 

 (space between eyes) to margin of jowl, and a similar and somewhat triangular median stripe 

 from base of antennffi to margin of buccal cavity ; on the front the lateral polliuose stripes 

 are connected by a narrow poUinose band ; antennae moderately stout, but first joint not 

 thicker than second. 



Thorax: dorsum (in denuded specimens) shining black, greyish polliuose in front and 

 with a pair of admedian longitudinal greyish polliuose stripes on anterior half; a tuft of 

 bright golden hair below humeral callus, a similar tuft in front of base of wing, connected 

 with a row of hair of same kind on hind margin of mesopleura. 



Abdonwn clothed with minute yellowish hair; dull black median blotch at base of each 

 of first four segments broad, quadrate, diminishing in size in succession from the front. 



Wings: infuscated costal border before stigma not descending below third longitudinal 

 vein, and scarcely darker than stigma itself ; prolongation of infuscated costal border beyond 

 transverse band dark brown, sharply defined, and ending abruptly just below upper branch of 

 third longitudinal vein ; lower portion of apical half of wing slightly infuscated, leaving 

 outer margin of brown transverse band bordered by a whitish streak (seen also in many 

 other species), which is interrupted by a prolongation of transverse band to hind margin and 

 so forms the semi-clear space iu fourth and fifth posterior cells. 



Haltcrcs : dark brown. 



