452 Tachinidae. 



D. spinipennis Meig., which is distinguished only by its yellow 

 palpi, is now generally considered identical with the present species, 

 and this is no doubt correct; as seen the palpi in my material varies 

 from yellow to black. 



D. setipennis is not rare in Denmark; Frederiksberg Have, 

 Gentofte, Ermelund, Dyrehaven, Sletten, Boserup, Jyderup, Næstved, 

 Bogenæs; on Bogø south of Sealand; on Funen at Odense and Middel- 

 fart; in Jutland at Skanderborg and Skørping, and on Bornholm 

 (Stein); Nielsen also found its puparia at Hald in Jutland; the dates 

 are ^/g — ^1^. It is known as parasite especially on Forficula auriciilaria, 

 but also on Pheosia tremula^ Lasiocampa guercus, Euprociis chry- 

 sorrhoea, Notodonta trepida, Panolis griseovariegata, Dioryctria abie- 

 tella, Grapholitha strohilella and Carpocapsa pomonella\ pupæ have 

 also been found in nests of Crabro cinxius, in a gall of Saperda populnea 

 in which a Crabro piibescens has nested, m clover-stalks together 

 with pupæ of Agromyza lappae, and under bark with Eccoptogaster 

 intricatus, but in all these cases it is not impossible that the host 

 had been a Forficula. Nielsen has (Vidensk. Medd. fra naturh. Foren. 

 64, 1913, 237; see also correction, ibid. 66, 1915, 213, note 3) treated 

 its biology; he bred it from imagines of F. auricularia; the young 

 larva bores in through an intersegmental membrane, almost always 

 on thorax; the larva bores out, generally at apex of abdomen, and 

 then pupates on the place where it left the host, under bark, 

 on the ground or similar piaces, and here they, generally, hibernate. 



Geographical distribution: — Europe; towards the nortli to 

 middle Sweden, and in Finland. 



108. Pliytomyptera Rond. 



Small, black species, without or almost without pruinosity. 

 Head about as broad as thorax, somewhat flat behind, higher than 

 long. Frons broad, almost not protruding. Cheeks very narrow down- 

 wards, jowls about one half of the height of the eye. In both sexes 

 ocellar, inner and oli ter vertical and two orbital bristles. Occiput 

 with only black hairs. Frontal bristles reaching to about insertion 

 of antennæ, the uppermost reclinate, with an outwards directed 

 bristle behind. Cheeks with bristly hairs down to the middle, for the 

 rest bare. Vibrispæ ascending to near middle, distant. Eyes bare. 

 Epistoma slightly retreating, but deeply impressed and thus strongly 

 concave. Oral cone and proboscis somewhat short, palpi a little dilated 



