94 Phoridae. 



according to the time at which the pupæ were found, passed in the 

 pupal stage, I also possess an immature specimen of curvinervis taken 



on ^75. 



The species of Chaetoneurophora seem most often to occur on 

 trimks of trees, in this way I have taken thoracica and caliginosa in 

 no small number, and it is also recorded for fennica; further the 

 species may often be taken under carrion, thiis I have taken fennica 

 and it is also recorded for the other species; when taken here it is 

 generally only in the female sex, and no doubt they occur here for 

 depositing the eggs; when chased on these piaces, they generally 

 do not fly, but run quickly; the tracing power of the species must 

 be very great, I once laid a dead sparrow out on the ground in a 

 wood, and when I came back to it half an hour later, Ch. fennica was 

 present very numerously on it, but otherwise I did not see the species 

 on the place; the same is mentioned for curvinervis by Wood (Ent. 

 Month. Mag. 2, XVII, 1906, 187). As seen above and under the 

 species, and also otherwise known, the species may further be taken 

 in nests of moles and in foxes' dens, certainly also occurring here for 

 depositing the eggs, or they are found here as pupæ. From the men- 

 tioned facts it may be induced that the larvæ no doubt feed on carrion, 

 but when the species develop from nests of insectivores etc. this can 

 hardly be the case; the larva may be supposed to have fed here on 

 various refuse or decaying matters present in such piaces. The com- 

 munication by Bremi about the larva of caliginosa in larvæ of Crabro 

 lituratus may, I think, also refer to the larva living in dead larvæ of 

 the Crabro or upon the whole in the nest. 



Of the genus four species are known from the palæarctic region, 

 all four also occurring in Denmark. 



Table of Species. 



1. Halteres black; hind tibiæ with three bristles 2. curvinervis. 



— Halteres yellow; hind tibiæ with two or more than three 

 bristles 2. 



2. Hind tibiæ with two bristles 1. fennica. 



— Hind tibiæ with more bristles 3. 



3. Hind tibiæ with four bristles; thorax often more or less 

 pale; wings with costa a little thickened in the male, much 



in the female and in this sex the apex of the wing darkened 3. thoracica. 



— Hind tibiæ with 5—7 bristles; thorax black; wings without 

 darkening and costa not thickened 4. caliginosa. 



