476 Tachinidae. 



yellow as it is more or less yellow at base and for the rest generally 

 slightly brownish yellow pruinose, so that it gets a quite or almost 

 quite yellow aspect. 



Length 4,5 — 6 mm. 



B. flavifrons is not common in Denmark; at Copenhagen (the 

 author), Ordrup Mose (Stæger, the author), Dyrehaven (Kryger), 

 Donse (the author), Boserup (H. J. Hansen), Sorø (Stæger), Tisvilde; 

 on Langeland at Lohals (the author); in Jutland at Sønderborg 

 (Wtistenei), Kliplev (the author), Hald (H. J. Hansen) and Skørping 

 (the author), and on Bornholm in Almindingen (H. J, Hansen); 

 the dates are ^i/, — ^j^-, Stæger records it 1. c. to ^^/g. It occurs on flowers, 

 especially composites, and on ^^/g I thus took it in some numbers in 

 Ordrup Mose, and likewise on ^^Z, — ^^/^ at Skørping. A couple of my 

 specimens are bred from Tephroclystia succenturiata, the imagines 

 developing in June; earlier no host was recorded. 



Geographical distribution: — Northern and middle Europe; 

 according to Stæger 1. c. occurring in Sweden. 



Remarks: I have studied Stæger's type specimens of the five 

 by him in Zett. VIII enumerated species, as well as the types of 

 cristata Fabr. and minuta Fabr., and I have come to the certain 

 conclusion, that the four here enumerated species are well founded, 

 while minuta is based on small and dark specimens of geniculata. 



112. Helocera R. D. 



{Eloceria.) 



Small species of black colour, but with abdomen in male marked 

 with yellow. Head as broad as thorax, a little convex behind and 

 somewhat puffed out below, higher than long. Frons somewhat broad 

 and equal or about in both sexes, slightly protruding. Cheeks narrow; 

 jowls half the height of the eye. Ocellar bristles quite small; in both 

 sexes outer and inner vertical, and in female two orbital bristles. No 

 postocellar or occipital bristles. Occiput with black hairs. Frontal 

 bristles not reaching to end of second antennal joint, the uppermost 

 directed outwards. Cheeks bare. Vibrissæ not ascending. Eyes bare. 

 Epistoma somewhat retreating and a little hollowed. Palpi not 

 developed. Antennæ inserted high above middle of the eye, third 

 joint broad, about thrice as long as second in male, much smaller 

 in female; arista with second joint short. Thorax rectangular; three 

 postsutural dorsocentrals and a couple of præsutural and three or 



