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of Hendel viz. that Perris (Mém. Soc. Sc. Nat. Lille, 1850, 119) had 
bred Salticella fasciata Meig. from Helix pisana Miill., but without 
being able to decide whether the larva was parasitical or sapro- 
phagous. To the recorded few cases only very little has been 
added later on, as far as I have seen; Schmitz mentions (Biol. 
Zentralbl. 37, 1917, 31) that he has once bred Sciomyza (Ditaenia) 
cinerella Fail. from a snail-shell, and Mercier (Ann. Soc. Ent. de 
Belgique LXI, 1921, 164) has, like Perris, bred Salticella fasciata 
Meig. from Helix pisana, but stating that the Helix was living, thus, 
as it seems, proving this Sciomyzid to be a parasite. 
As said above I have seen no other case recorded. Now I have 
myself bred a number of species or I have got them bred by my 
friend Cand. Kryger, but only from the puparia without knowing 
the larvæ and thus not being able to decide anything as regards 
their feeding habits. The species are: Sciomyza albocostaia Fail., 
5. obtusa Falk, 5. dorsata Zett., 5. ventralis Falk, Calobaea bifasciella 
Falk, Bischofia simplex Falk, Dichrochira leucopeza Meig., D. pec- 
torosa Hend., D. glabricula Falk, D. nigrimana Meig., Ditaenia 
grisescens Meig., D. cinerella Falk, Anthichaeta analis Meig., Ånthi- 
chaeta sp., Heptopteryx brevipennis Zett., Ctenulus pectoralis Zett., 
Ct. punctatus n. sp. (to be described on a following page), Tetanocera 
ferruginea Falk, T. elata F., T. silvatica Meig., Dictya umbrarum L , 
Pherbina coryleti Scop., Hedroneura rufa Panz., Elgiva albiseta Scop., 
Limnia unguicornis Scop. and Sepedon sphegeus F. The species are 
all taken as pupæ in the various flood refuse at the border of fens, 
ponds and lakes. When the flood refuse here is sieved in earlier 
or later spring, especially in March, April and May (my dates range 
in all from to ^Ve) the pupæ may be present in smaller or greater 
numbers, sometimes rather numerous, and the development then 
takes place sooner or later. The pupæ evidently have hibernated 
in this State as I have had pupæ taken already on ^Vi; accordingly 
the pupation takes place in autumn; I have also once taken the 
pupa of Bischofia simplex on Vio, the imago came on ^Vio, but this 
was in a heated room, in the free it would no doubt only have 
come in spring, and on the same date I took a pupa of Ditaenia 
grisescens the development of which was likewise accelerated. 
As regards the puparia of the named species I shall only make 
the following remarks, but except the three species treated later 
