A Monograph of Egyptian Diptera. ZZ 



;n(i.2. {Mclithrcpfus) (ISG2) et Nov. Kcise, Uipt,, 347.19. {Mclilhrep- 

 fiis) (1SG9); Bonds., Fini, tvaviug. Ins., I. 258,4. (18(il); Kow., Wicii. 

 Kiitoin. Zeitg., IV. 134. (Melithrepti/s) (1885); Neuhaus, Dipt. 

 Marchica, 113.6. {Melithreptus) (1886); Sthohl, Mittheil. Natur- 

 wiss. Ver. Stciermark, XXIX. 1892.1G2. {Melithreptus) (1893), 

 Wien. Entoin. Zeilg., XVIII. 145.97. (MelUhrevtus) (1899) et 

 W'issensch. Mittheif. Bosn. u. Herceg., VII. 591. {Melithreptus) 

 (1900); LuNDB., Vidensk. Meddel., 1898. 304.96. {MeUfhrepfiis) 

 ,1898); Verr., Brit. FI., VIII 432 et 433. (1901); Vim.en., Fcuil. 

 .louii. Naturel., XXXIII. 147. (1903). 



= pliil(tnthus ScHiN., {nec Meig.), Vlm'Ii. znol.-hol. Ver. Wieii, 

 VII. 371.8. {Melithreptus) (1857). 



^pirta IIOLMCR., (Efv.Koiigl.Vet.Akad.Forhandl., XXIX. 100 

 (1872)/ 



D1A(1\()SIS: T\\c largest and loiigest speeie.s of thi,s genus. 

 Fliorax w itli its side niargins eontimioiislv yellow ; abdomen very 

 elongate. 



I)KS('/UPT/()\:- Mnle: (PI. III, lig. 11), Face entirely 

 shining yellow, somclimes vvith a grecnish-yellow tinge, and 

 l)earing very inconspicuous, short, pale pubescence ; jowls pale 

 \ello\v, with whitish pubescence, which extends up the back 

 of the head and becomes conspicuously white and coarse at the 

 widening about the niiddle of the occiput, caused by th'e incurved 

 niargin of the eye; above this, and on the top of the occiput, the 

 pubescence is pale yellow to tawny. Vertex rather shining black 

 with black hairs on the front part, which are curved forward, and 

 with tawny hairs on the liind part. Frons rather produced, 

 entirely yellow, with inconspicuous yellow pubescence. Eyes touch- 

 ing for abnut eigbt or nine facets. Antennse orange-yellow, 

 usiiallv darkcned above the third joint, and occasionally with the 

 apex and the upper part dark brown or blackish ; on the dorsal 

 surface of the two basai joints there are some minute black 

 bristles ; arista brown, quite bare, gradually tapering, and not 

 quite as long as the three joints of the antennae together. 



Thorax moderately shining or even dull, with' traces of two 

 broad faint grey lines clos3 together on the front half of the dise; 

 the side margins are ail yellow from the humeri to the scutellum, 

 but more broadly and clearly yellow on the front half ; pubescence 

 brownish-yellow and somctimes pale yellow, paler and longer on 

 the sides and on the pleura?; scutellum dull-yellow wSth rather 

 long pale yellow pubescence and in some sj^ecimens, a few black 

 hairs near the apex. 



Abdomen dull black or brownish-black, rather shining near 



