Dolichopodidae. 57 



hairs on the apical part. Wings without costal svvelling. Squamular 

 fringe black. 



Length 4,5 — 5 mm, 



H. diadema is not rare in Denmark, but seems to be ratlier local ; 

 Amager, Charlottenlund; on Funen at Odense; in Jutland at Gjerlev 



Fig. 17. Wing of H. diadema c?. 



near Randers Fjord and Struer; and on Bornholm. My dates are in 

 July and the first part of August. It occurs at the coast, especially 

 on Garex, often in great number. 



Geographical distribution : — Europe down into Spain and Sicily, 

 and further in Egypt; towards the north to middle Scandinavia. 



5. DolicllOpus Latr. 

 Species of medium or somewhat large size, and always of metallic, 

 green or æneous colour. Head as broad as, or a little broader than 

 thorax; it is short, about semiglobular, and about as broad as high, 

 or a little broader, especially in the female; it is broader above than 

 below, as the greatest breadth lies above the middle. Occiput slightly 

 arched. Vertex somewhat excavated, and the ocellar tubercle a little 

 prominent. Frons broad, slightly decreasing in breadth towards the 

 antennæ, especially in the male, which has the frons a little narrower 

 than the female, in which latter sex it has almost parallel margins. 

 There are ocellar, outer vertical and postvertical bristles, and on the 

 posterior side of the ocellar tubercle a few small hairs. Eyes large, 

 somewhat oval in circumference, metallic green with coppery reflexes 

 in the living specimens; they are densely short-hairy; the facets are 

 in the males very slightly enlarged towards the epistoma. The eyes 

 are separated, more broadly in the female than in the male. The 

 postocular bristles are strong and form a single row; the bristles 

 which are inserted along the oral aperture behind are interrupted in 

 the middle, as there are no bristles just above the aperture. The 

 antennæ are inserted near to each other, somewhat above the middle; 

 they are five-jointed, short or somewhat longer, and generally longer 



