Ghilosia. 15'5 



male yellow with black intermingled ; Ihe bristles, especially the scutellar 

 marginal bristles, very short. Abdomen shining, clothed with short, 

 pale hairs, only longer at the basal corners; the hairs are depressed, 

 except at the basal corners of the segments where they are erect, the 

 space with erect hairs largest on second segment becoming smaller 

 on each foUowing segment; on the middle of second and third seg- 

 ments are black hairs on the hind part, and thus the depressed, pale 

 hairs form to some degree bands. The base of middle tarsi may be 

 more or less reddish. Hind femora only with a few black, setulose 

 hairs below at apex. Halteres orange. 



Length 8 to about 10 mm. 



C. honesta is rare in Denmark, and it was for the first time taken 

 in 1897; Ordrup Mose, Lyngby Mose, Ørholm, Geel Skov, Donse, Tyve- 

 krogen (the author), Hillerød (Godskesen), in all 8 specimens. My 

 dates are ^^/s — ^k, it is thus evidently a spring species. 



Geographical distribution : — Northern and middle Europe down 

 into Italy ; it is not known from Scandinavia but is recorded recently 

 from Finland. 



13. C. frontalis Loew. 



1875. Loew, Verh. zool. bot. GeseJl. Wien, VII, 587, 4. — 1862. Schin. 

 F. A. I, 275. — 1894. Beck. Nov. Aet. Leop. Carol. Akad. LXII, 392, 48, 

 Fig. 118. — 1907. Kat. palåarkt. Dipt. III, 27. 



Male. Eyes brownish-hairy. Frons large and unusually swollen, 

 bluish black, shining, with a narrow longitudinal groove; vertex and 

 frons black-haired, Epistoma broad, greyish 

 pruinose, with longish, partly pale, partly 

 dark hairs on the sides; it is slightly hol- 

 lowed below the antennæ; the central knob 

 not very prominent, somewhat pointed, 

 between it and the mouth edge the epistoma 

 is somewhat hollowed; it is somewhat 

 descending but the lower part slightly pro- 

 minent. Eye-margins not broad, somewhat 

 pruinose except quite below, with longish, 

 pale hairs. Occiput grey pruinose, this 

 colour stopping below the eyes; the hairs 



are whitish, above there are besides some r^. ^r. .. . .r, r ^ ,■ , 

 ,, , , . , , ,, , , . Fig. //. Head of C. /rontoZiS c?, 



long, black hairs, but the long hairs 



behind vertex are yellow. Antennæ small, third joint roundish, not 



longer than broad : the third joint is reddish or yellowish red, but 



