Dinera. 275 



Length 8 to about 10 mm. 



P.sybarita is somewhat common in Denmark; Lundtofte, 

 Hillerød, Donse, Vedbæk, Tisvilde, Gilleleje, at Sorø; on Langeland 

 at Lohals; on Funen at Odense; in Jutland at Bevtoft, Toftlund, 

 Sønderborg, Varde, in Nørholm Skov, at Frijsenborg, Ry, Vestbirk 

 near Skanderborg and Rebbild, and on Bornholm; the dates are 

 4/, — i2^g. It is especially seen on tree-stems, but also on flowers f. inst. 

 on Knautia. 



Geographical distribution: — Europe; towards the north to 

 middle Sweden, and in Finland. 



55. Dinepa Rond. 



Medium sized species of grey colour. Head slightly broader 

 than thorax, a little convex behind and a little puffed out below, 

 not much higher than long. Frons narrow in male, broad in female, 

 rather protruding. Cheeks very broad, and jowls fully half as broad 

 as the eye is high. In both sexes ocellar and inner vertical bristles, 

 in female further outer vertical and two orbital bristles. Postocellar 

 and occipital bristles distinct. Behind postocular bristles black hairs. 

 Frontal bristles reaching to lunula, all crossing in male, in female 

 an outwards directed bristle above. Cheeks with some few hairs, 

 sometimes nearly wanting. Vibrissal ridges not converging below; 

 vibrissæ not ascending. Epistoma not retreating, somewhat reflected 

 below; it has a middle carina which is high above between the an- 

 tennæ, vanishing below. Oral cone and proboscis of medium length, 

 the latter slender, with small labella; clypeus linear, excised below. 

 Palpi thread-like. Antennæ inserted below middle of the "eye, short, 

 third joint at most twice as long as second; arista plumose, somewhat 

 short. Thorax rectangular; three postsutural dorsocentrals and a 

 middle præsutural pair and a præscutellar pair of acrostichals, Scu- 

 tellum with three marginal bristles on each side. Three sternopleural 

 bristles. Pteropleura with hairs and a bristle above. Abdomen elong- 

 ated conical; excavation on second segment only present at base; 

 only marginal bristles, none on second segment, fifth with only a 

 row. Legs somewhat long, but less than in the foregoing genera, 

 and likewise tarsi not specially long; the legs moderately bristly; 

 claws and pulvilli in male elongated. Wings with first posterior cell 

 closed at margin or short-petiolate, ending a little before apex of 



18* 



