166 Annals Entomological Society of America __[Vol. VII, 
HYPOPYGIUM 
Worked out by Schnabl and Dziedzicki for a large number 
of connectant as well as true anthomyioid forms. The char- 
acters agree in a general way throughout the connectant 
forms much as do those of the female reproductive system, 
not appearing to furnish variations of sufficient scope for 
definite separation into two main groups, except to mark off 
the Coenosiide from the other forms. But they will doubtless 
be of much use in the separation of small groups. The Calli- 
phorine and higher muscoid groups need the same careful 
study for comparison with the excellent results of these authors 
on the forms which they have investigated. 
EGG 
Leucomelina, Limnophora and Spilogaster differ considerably 
in egg structure from Musca, Muscina, Synthesiomyia, Stomoxys, 
the Calliphorine and higher groups. They deposit a small 
number of very large elongate eggs, either heavily striate 
longitudinally or ribbed, or very minutely scaled-reticulate, 
very slightly curved, yellowish-whitish in color, with thick 
chorion, translucent-enameled in appearance. 
It is probable that these approximate the characters of the 
eggs of Orthellia, Graphomyia, Pyrellia, Myospila, Eumusca and 
Hypodermodes, all of which deposit only a small number of 
very large eggs. 
The egg may be expected to furnish important characters 
for the separation of the connectant forms. 
MAGGOT 
The position of the anterior spiracle in the third-stage 
maggot of Fannia is quite in contrast to its position in Musca, 
being situated well forward on the third segment. Whether 
this holds good for Anthomyia and Coenosia is doubtful. The 
first-stage maggot characters, especially the cephalopharyngeal 
skeleton and anal stigmata, should differentiate the con- 
nectant forms from the true anthomyioids. 
