Myiocera. 277 



56. MyioceFa R. D. 



Species of medium or ratlier large size, black, greyish pruinose. 

 Head slightly broader than thorax, somewhat convex behind and 

 puffed out below, slightly or considerabiy higher than long. Frons 

 narrow above in male, broad in female, more or less protruding. 

 Jowls broad, half or two thirds as broad as the eye is high. In both 

 sexes ocellar and inner vertical bristles, the latter somewhat fine in 

 male, strong in female, and in this sex also outer vertical and two 

 orbital bristles. Behind postocular bristles black hairs. Frontal 

 bristles reaching to lunula, all crossing in male, in female and out- 

 wards directed bristle above. Cheeks bare. Vibrissal ridges not con- 

 verging below; vibrissæ not ascending. Epistoma not retreating, 

 with a high carina above between the antennæ, reflected and somewhat 

 protruding below. Oral cone and proboscis of some length; clypeus 

 linear, deeply excised at the end. Palpi thread-like. Antennæ inserted 

 well below middle of the eye, third joint about thrice as long as second; 

 arista long-plumose. Thorax rectangular; three or four postsutural 

 dorsocentrals, and two or three præsutural and generally two post- 

 sutural acrostichals ; two or three posthumeral and likewise intraalar 

 bristles. Scutellum with three marginal bristles on each side, some- 

 times a weak fourth, the lateral. Three sternopleural bristles. Ptero- 

 pleura with a bundle of hairs and a bristle above. Abdomen elongated 

 conical; excavation on second segment reaching hind margin {ferina) 

 or not {carinifrons). Abdomen has long marginal bristles, on second 

 segment a pair; fifth with bristles all over. Legs long, with specially 

 long tarsi with elongated joints; they are moderately bristly, the 

 bristles on femora long, but not strong; claws and pulvilli in male 

 strongly elongated. Wings with first posterior cell open, ending a 

 little before apex of wing; discai angle obtuse; no costal spine. 



About the development not much is known; ferina has been 

 bred from larvæ in wood, possibly of Dorcus parallelepipedus; the 

 larva of carinifrons has in first stage rows of chitinous dents and be- 

 longs to Pantel's group 5, 



Of the genus four European species are recorded besides some 

 doubtful; two occur in Denmark. 



Table of Species. 



1. Three postsutural dorsocentral bristles; excavation on 

 second abdominal segment not reaching hind margin; 7,5 

 to about 10 mm 1. carinifrons. 



