90 n. C. EFFLATOUN. 



europeau E. sonchi L. from the flower-lieads of the following Corn 

 positoe : Sonchus oleruceus, S. arvensis, Leontodon aiitumnale, L. 

 hastîle, Tragopogon pratensis, Homogyne alpina, Scorzonera {Po- 

 dospermum) jacqiiinii, Carduus nutans and Crépis spj). Only une 

 species is so far known from Egypt, E. sororcida, Wied., which lias 

 a very wide geographical distribution, heing known in India, Tene- 

 riffe, Madeira Island and North Afriea up to Ei-ythrea. 



ENSINA SORORCULA, Wiedemann, 

 (PI. IVfig. 6 and PI. I fig. 13) 



WiEi).. Aiissereurop. Zweifl. Ins., II. 509.52 (Tn/pcta) . 

 CzERNY, Wien. Entom. Zeitg., XXI. 256 {âryna) et XXV. 254 

 f. 1-2 (id.) (1906); Beck.. Mitteil. Znol. Mus. Berlin, IV. 144. 420 

 {(hynn) (1908): Bez., Mem. Indian Mus, III. 3. 159 {O.vyna, 

 (1913). 



vacUlnns, Wollast., Ann. Mag Nat. Hist., (3) I. 115. (1858). 



rarnpeîmh \a\. Wulp, Termesz. Fuzet., XX. 143.28. pi. III. 

 f. 3-4 (Leptomyza) (1897). 



bisetosa (maie) Enderlein. (1911). 



DIAGNOSIS: — A small, almost entirely grey species, dis- 

 tinguished by its rather slim and elongate body and wings and by 

 its reticulate wing pattern which can vary from being dark to very 

 light. 



MaJe and Female. I>engtli of hod\ : 3 nnn.; ovipositor : 

 0.8 mm. : wing : 2.6 mm. 



DESCRIPTION:— Head entirely yellow liut whitish towards 

 the centre of the frons (immediatelv below the ocellar triangle), on 

 the eye margins and on the face, epistoma, cheeks and occiput owing 

 to a very fine white pulverulence ; occiput swollen below; yertex yel- 

 low, but black on the ocellar triangle ; antennae yellow with a verv 

 minute pale pubescence; arista dark brown and microscopically pu- 

 bescent; s. or. 2, i.or. 2: ail the bristles are black except the up])er 

 s.or., the shorter rt., the prt. and the genal bristle whitish. 



Thorax and scutellum blackish but entirelv covered with a 

 dense brownish or yellowish-grey pulverulence and with the three 

 darker longitudinal lines on the dise very inconspicuous : on tlie 

 pleurae the pulverulence is much lighter in colour, almost wliilisli, 

 especially below; the pubescence on the dise is very ])ale yellowish, 

 fairly coarse and adpressed; ail the bristles are black except the 

 srp. light greyish-yellow and the pt. pale yellow; scutellum small 

 with only twob.sc' and very rarely two very small but distinct a. se. 

 are présent. 



