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Mogensen gave as liis opinion, that the fly belonged to another 
species than those which he had formerly found, because the larvæ 
while in the tumors were surrounded by a layer of a yellowish, 
fatty substance, which he had not observed in the case of the 
other species and because the larvæ before pupating made a cocoon 
of earth by means of a bright liquid which later on changed into 
a white substance. 
When I got the package the specimens were in a rather bad 
condition; the vial was broken, the larvæ dried up and the flies 
very dirty. At first I believed that it was the same species, which 
I had described under the name of Mydæa anomala as the flies 
answered well to Jaennickes description, and the differences 
which I could observe between the flies and those which I formerly 
had examined seemed to be very slight; but as soon as I had 
submitted the larvæ and puparia to a doser examination I saw 
that is was a distinet species. The question was now to solve, 
which of the two species was the true M. anomala. After the 
description of Jaennicke I was not able to decide the question; 
therefore I adressed myself to the Museum in Vienna, where the 
type specimen of M. anomala is preserved. By the permission of 
the direction of the Museum I received the type and by a thorough 
comparison I succeeded in tinding that the species which Mr. Mo¬ 
gensen had found in 1912 was the true M. anomala Jaenn., 
while the fly which I had called by this name in 1911 in reality 
belongs to a new species, which I propose to name Mydæa tor- 
quans n. sp. 
In this paper I shall give a description of M. anomala ; as 
to the description of M. torquans I refer to my previous paper. 
Here I may only remark, that M. anomala resembles very mueh 
M. torquans and had it not been for the absolute specific differ¬ 
ences in the larvæ and puparia I should have hesitated in separating 
the two species. There are, however, some differences: M. anomala 
is a little smaller and of a mueh paler colour, the pleura being 
quite pale, while they are grey in M. torquans ; in the male of 
