Platypeza. 31 



on hypopygium larger than in nwdesta, with a downwards pointing 

 apex. Abdomen has erect hairs, yellow on basal part, black towards 

 apex. Legs yellow, haired as in modesta, and hind tibiæ and tarsi 

 dilated in the same way, only the fourth tarsal joint relatively a 

 little more dilated. Wings yellow; medial cross-vein well before 

 apex of mediastinal vein; lower branch of fork incomplete but reaching 

 quite near to the margin and sometimes reaching it; anal cell a 

 little shorter than the rest of the anal vein. Squamulæ yellowish 

 brown. H alteres yellow, or the knob a little obscured. 



Female. Rather different. Frons broad, grey, with scattered 

 minute hairs. Thorax grey or more brownish above, without stripes; 

 the dorsocentral bristles very short. Abdomen red with grey pruinosity 

 on the front part of the segments, widening on the sides nearly to 

 the hind margin, but interrupted in the middle, and with dark hind 

 margins to the segments; it is short-haired, the yellow hairs at base 

 only slightly longer. Legs yellow, hind tibiæ and tarsi fully as dilated 

 as in male. Wings with the lower branch of the fork generally com- 

 plets. 



Length about 4 mm. 



P. rufa is not rare in Denmark, but only taken in few localities; 

 in Frederiksberg Have at Copenhagen (Stæger), Charlottenlund, 

 Dyrehaven (Schlick), Geel Skov (the author); the dates are ^/g — ^^lo- 

 We have it bred from fungi on ^/^o (Schlick). 



Geographical distribution: — Northern and middle Europe 

 dowh into Belgium and Germany; towards the north to southern 

 Sweden. 



3. P. atra Meig. 



1804. Meig. Klass. eur. zweifl. Ins. I, 310, 3 et 1824. Syst. Beschr. IV, 

 7, 4. — 1815. Fall. Dipt. Suec. Plat. 6, 3. — 1838. Zett. Ins. Lapp. 529, 3 et 

 1844. Dipt. Scand. III, 905, 7. — 1862. Schin. F. A. I, 242. — 1901. Verr. Brit. 

 FL VIII, 45, 4, figs. 65—66. — 1907. Kat. palåarkt. Dipt. III, 186. — 1910. 

 Wahlgr. Entom. Tidsskr. 234, 4. 



Male. Vertex, frons and face black; frons moderately broad, 

 with a tuft of long hairs at the upper corner. Jowls, cheeks and 

 also epistoma, thus thewhole face, with long black hairs; face broader 

 than high. Occiput black with black hairs, postocular cilia short. 

 Antennæ and palpi black. Thorax and scutellum velvet black; 

 dorsocentral hairs long and bristly and at the sides of the disc 

 numerous bristles; also the humeral bristles rather long; three noto- 



