470 Tachinidae. 



Thorax rectangular, transverse suture wanting or almost wanting ; three 

 orfour postsutural dorsocentrals, two or three small præ- and three post- 

 sutural acrostichals; a præsutural intraalar bristle. Scutellum with 

 three marginal bristles on each side, and a pair of small apical, crossing 

 hairs. Three sternopleural bristles. Pteropleura above with a couple 

 of hairs, one of which generally bristly. Abdomen conical; excavation 

 on second segment not reaching hind margin; only marginal bristles, 

 second segment without or with a pair; fifth segment mth only a 

 marginal row. Genitalia small, hidden. In female abdomen more 

 flat, and fifth segment pointed. Legs with anterodorsal bristles on 

 hind tibiæ few and unequal; claws and pulvilli small; front tarsi in 

 female simple. Wings with first posterior cell narrowly open or just 

 closed, ending at or just before apex of wing; discai angle rounded; 

 posterior cross-vein about in the middle between medial cross-vein 

 and angle; cubital vein with bristles to medial cross-vein; anal vein 

 reaching the margin; a more or less distinct costal spine. 



The species have been bred from several Heterocera, but they seem 

 to be mainly Tipulid parasites. They belong (so far known) to Pantel's 

 group 6, and they form a secondary breathing hole, in the Tipulid 

 larva in one of the large tracheæ. 



The genus is characterised by the long geniculated proboscis, 

 and the anal vein reaching the margin, a nearly unique case in the 

 Tachinidae. The species frequents flowers, and, in contrast to most 

 other Tachinids, often flowers of composites. 



Of the genus about 15 European species are recorded; 4 occur 

 in Denmark. 



Table of Species. 



1. The lower margin of the eye not reaching to the large vi- 

 brissa; thorax more or less distinctly striped; abdomen in 

 male grey, more or less yellow on the sides, in female gener- 

 ally quite grey, in both sexes with a pair of brown spots on 



middle of the segments; second segment without bristles.. 2. maculata. 



— The lower margin of the eye reaching to or below the large 

 vibrissa ; thorax not striped ; abdomen without or with much 

 smaller spots; second segment with or without a pair of 

 marginal bristles 2. 



2. The lower margin of the eye reaching just to the large 

 vibrissa; antennæ in male relatively small, third joint 

 about thrice as long as second; abdomen in male generally 

 yellow on the sides, in female quite grey; second segment 



with a pair of well developed marginal bristles 3. geniculata. 



— The lower margin of the eye reaching a little below the 

 large vibrissa; antennæ in male with third joint larger, or 



