,1 Mono(}raph o/ Egyptian Dipteiv. 85 



12. SPHENELLA, Kobineau-Desvoidy. 



Rob.-Desv,, Myod., 773 (1830). 



Distingiiished by tlie fnirly long niid genieulat.e i)rc)l)oscis, the 

 prominent epistoma, the 4 scutellar bristles, and the lianded wings 

 with very approximate cross-veins. 



Head broader than higli; frons proniinent, fairly long, broad 

 and depressed; face short and concave; eyes small, fairly rounded ; 

 cheeks not broad; epistoma prominent; proboscis long, genicnlate; 

 palpi small with a few scaree bristles; antennae inserted below the 

 middle of the eyes, with the tip of the third joint reaching the epis- 

 toma, less than twice the length of the second joint and a little point- 

 ed at the upper corner; arista microscopically pubescent; oc. strong, 

 s.or.2, the npper white and short, the lower black, i.or. 2; et. one 

 black and long, the other white, short and very straight: />rt. diver- 

 gent; oc'p. strong, whitish; genal bristle not strong. 



Thorax with a complète chaetotaxy, bnt the sep. very weak, 

 almost obsolète ; only one strong black mpl. ; scntellum flat with 4 

 bristles of almost equal size, the apical pair diverging at the apex. 

 Abdomen with apical and latéral bristles; ovipositor short and flat- 

 tened. 



Legs short and strong ; front f emora with rows of bristles above 

 and beneath ; middle tibiae with a single spnr ; hind tibiae with some 

 short hairs in addition to the usual fine pubeseence. 



Wings narrow, elongated, with a very characteristic pattern 

 which consists of a complète cross-band after the middle, as well as 

 spots; costal bristle small; RI short, ending well before the radio- 

 median cross-vein ; R2 + 3, R4-f5 and Ml parallel ; R4 + 5 bare ; 

 radio-median and médian cross-vein very approximate, the distance 

 between them being less than the length of the former ; inferior angle 

 of Cu cell drawn out into a short and broad point, as long as the 

 médian cell. 



Only one species is known so far in the Palearctic Région which 

 seems to hâve a very wide distribution in Europe, Asia Minor and 

 North Africa. The larva is known to breed in Europe in almost ail 

 the species of plants of the genus Senerio, as well as in Centaurea, 

 and Cinrrnria sp. 



TYPE : Sphenella marginata Fallen (1820). 



