304 LEPTID.E 



upwards at its middle as a small triangle on which is a small blackish spot ; 

 the socketed epistoma darker grey and the side-cheeks light grey, and both 

 bare except that the side-cheeks bear a few short black bristles almost 

 hidden in the lower part of the channel which runs between them and the 

 epistoma ; jowls small, light grey, and bearing on the back part fairly long and 

 dense brownish pubescence (sometimes bleached in old specimens or black 

 in deeply colored specimens) ; back of the head light grey, bearing abundant 

 short black bristles but with the margin against the eyes quite bare, and a 

 little above the middle of the head these bristles disappear for a short gap 

 and then reappear rather more scattered ; occiput hollowed out at the middle 

 in a deep curve so that when viewed from above the broad eyemargins seem 

 puffed out, and all this part of the head quite bare ; ocellar space very 

 much elevated, rather dark brown or blackish, and bearing rather numerous 

 short sloping black bristles. Palpi greyish black, with black bristly hairs 

 which are shorter and scarcer than in the male. Eye-facets all equal. 

 Antennae more grey and bare than in the male, and the third joint apparently 

 slightly larger and more pubescent. 



Thorax light bluish grey with a pair of clear dark brown or blackish 

 stripes, and these stripes slightly widened anteriorly but not nearly 

 reaching the front of the thorax nor quite extended to the hindmargin, 

 and the grey space between the stripes is itself split by a very narrow 

 sharply defined dark brown middle line ; the outer less defined broad brown 

 stripes can be detected (when viewed from above) extending from the humeri 

 to above the wing-base ; humeri brown. Pubescence on the disc consisting of 

 scattered depressed golden (or Avhitish yellow) pile, but this golden pile 

 becomes more dense towards the sides between the humeri and the wing-base 

 and right across the hind part ; there are also a few longer more erect thinner 

 (usually) black hairs along the sides between the humeri and the wing-base 

 and on the postalar calli, but sometimes these hairs are tawny, and a few of 

 these hairs occur on even the disc itself. Scutellum blackish, with numerous 

 suberect black hairs and rather abundant shorter depressed golden pile. 



Abdomen black, but in perfect specimens the ground colour entirely 

 concealed by dense closely adpressed coarse yellow pubescence amongst which 

 are no erect and no black hairs but this pubescence very easily rubbed off ; 

 the abdomen is rather pointed at the tip. Belly dull brownish black, with 

 sparse yellow pubescence which ends abruptly at the end of the fourth 

 segment. Ovipositor blackish brown and composed of several tubular 

 segments which end in a pair of small rounded lamellae. 



Legs similar to those of the male ; front coxib with fewer hairs which are 

 often mainly brownish yellow, while the middle coxaa may have their 

 pubescence all brownish yellow or at least with several pale hairs on the 

 basal part, and the hind coxae have nearly all their few hairs yellow ; the 

 brownish yellow scales on the femora less dense, especially on the hind pair. 



Wings more pellucid ; spines on the subcostal vein slightly stronger and 

 extending almost to the tip. 

 Length about 6-5 mm. 



This species varies considerably in general appearance according to 

 the condition of the specimen, as the golden or yellow pile rubs off very 

 readily while the erect thin black hairs disappear almost as quickly, and 

 sometimes the entirely denuded abdomen appears to be shining brownish 

 black. It is very closely allied to the common European C. anratus Fabr. 

 (as identified by Loew), but C. auratus has the wings much more brownish 

 with the base very obviously dark orange and with the subcostal vein 

 conspicuously orange, the stigma lighter brown and usually rather thicker 

 through, the squamse more orange on the surface and with only pale brown 

 margins, the metapleural tuft darker and less conspicuous, the hind femora 

 more brownish, and the pubescence on the anterior coxse more greyish 

 black ; while the female of G. auratus differs in a similar way in the wings 

 and squamse, and has the pubescence on the inner part of the side-cheeks 



