456 Tachinidae. 



Length 3,5 — 4,5 mm, the male the smaller. 



Remarks: I have examined Zetterstedt's type and I find it 

 identical with my species; as seen in Stein's work he came to the same 

 result, and he thinks that minutissima Zett. is the same species, 

 which is, however, perhaps doubtful. 



C. zonella is rare, I know foiir specimens, a male and three females; 

 at Copenhagen (Giidmann), Charlottenlund, Dyrehaven (Schlick) 

 and Tisvilde (Kryger); the dates are from June to ^'/g. One of the 

 specimeng is labelled from Fungus on Alnus, and another was bred 

 from a Fungus with Tineid larvæ on Ulmus, taken in February, the 

 fly coming on ^^j^. Further Dr. Villeneuve has communicated to me 

 that he possesses a male specimen from Denmark, so that in all five 

 Danish specimens are known. 



Geographical distribution: — Hitherto known from Denmark 

 and Germany. 



110. Actia R. D. 



Species of smallish to medium size; colour greyish, or in many 

 species abdomen black with narrow white bands; sometimes ab- 

 domen more or less to almost quite yellow. Head as broad as thorax, 

 somewhat flat behind, rarely a little more convex, higher than long. 

 Frons broad or very broad, and of the same or about the same breadth 

 in both sexes, slightly or at most a little protruding. Jowls from one 

 fourtli of to half as broad as the height of the eye. In both sexes 

 ocellar, inner and outer vertical and two orbital bristles. Postocellar 

 and occipital bristles distinct. Occiput behind postocular bristles 

 more or less covered with black hairs. Frontal bristles descending 

 about to end of second antennal joint, the uppermost more or less 

 reclinate and behind it an outwards directed bristle in both sexes. 

 Cheeks bare, or at most with short hairs on upper part. Vibrissæ not 

 ascending, or only very slightly. Eyes bare or practically bare. Oral 

 bristles few in number. Epistoma only a little retreating, somewhat 

 hollowed, a little reflected below. Oral cone of medium length; pro- 

 boscis of about same length, or shorter, slender or a little thickened; 

 clypeus horse-shoe-shaped. Palpi thin, somewhat dilated outwards. 

 Antennæ inserted high above middle of the eye, second joint short, 

 third three to six times as long as second, often large and dilated, in 

 female generally shorter and smaller. In one species (fissicornis) 

 third joint is in male divided into two branches; arista with second 



