A Monogra-pli of Egyptian Di fiera. 107 



the posterior end there is at each side a conieal, wrinkled wart 

 or filament and below theni a brown posterior spiracular process 

 which bears the spiracles on the truneated end; this is wrinkled 

 in its basai part. He gives the length as t'ully 6 mm., bnt Lundbeck 

 States that Herold gives 8-11 mm. (which I think Tnust be the cor- 

 rect length). 



The species of Eumcrus are curions, interesting and character- 

 istic flies, which seem to mimic bées in their flight. They occiir on 

 varions flowers in gardens and in waste plac-es and onr E. vcstitus 

 is nearly always fonnd sitting on hot sandy places. 



Of the genus over 40 species are known from the Palaearctic 

 région, three of which hâve so far been found in Egypt. 



TABLE OF EGYPTIAN SPECIES. 



1 (2) Radius 4-f5 with a deep loop almost as 



in Enstalis, (PI. VI, fig. 6) i muscidus Bez. 



2 (1) Radins 4 + 5 only slightly dippcd. 



3 (4) Hind metatarsi of maie a little swollen 



and with very short inconspicuous pubes- 

 cence, (PI. VI, fig. 3, PI. I, fig. 14 and 

 PI. II, figs. 3 and 10) 3 amœnus Lw. 



4 (3) Hind metatarsi of maie very swollen, 



incrassate and very hairy, (PI. VI, fig.4) . 3 vestitus Rez. 



1. E. MUSCIDUS BEZ. (PI. IV., fig. 6) 



Bez., Syrph. œthiop. Mus. Nat. Imngarici, 14. (22), 16; (24) 59. 

 (female) (1921). 



DIAGNOSIS: — Abdonisn with some yellowish-red markings; 

 legs rather simple and slender; scutellum with vole, dense pubes- 

 cence; Radius 4 + 5 with a deep loop. 



DESCRIPTION: — Female: Face and frons entirely shining 

 seneous-black and covered with white hairs, which, on the faoe and 

 the sides of the npper part of the frons, possess a silvery sheen; 



