Faminy CALLIPHORIDAE 51 
while in Calliphorinae most of the known species have testes 
which are more or less elongate, rather constricted on the distal 
third, and are enveloped in tissue hoods of varying thicknesses, 
The vasa efferentit in Pollema are about one-third as long as 
the length of the testes, while in Rhyncomyia they are short. In 
Callitroga they are a little longer than the testes, but in Phor- 
mia, Protophorma, and Apaulina they are nearly twice as long 
as the testes and taper to the insertion. In Cynomyopsis and 
Lucilia the vasa efferentia are very long and slender. In the 
former they are about half again as long as the testes, while in 
Lucila they are more slender on the terminal one-third to one- 
half. 
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pee} es 
PGET VE VD AES. 
Fie. IV. Huascaromusca bicolor (Fabricius). Internal. reproductive 
system of male. ‘ 
A. Apodeme. VD. Vas deferens. 
ES. Ejaculatory sac. VE. Vasa efferentia. 
T. Testes. VG. Vehicular gland. 
The vehicular glands are oval to elliptic in Rhyncomyna, gut- 
like in Callitroga. In Phormia, Protophormia and Apaulina they 
are curled and from one-fourth to one-half longer than the 
testes. In Calliphora they are gut-like and more or less swollen 
basally. In Cynomyopsis they are about one-fourth longer than 
the testes and in Lucilia they are about two-thirds longer than 
the testes. - 
The vas deferens in Pollenia is but little longer than the glands. 
In Rhyncomyia it is slender. In Callitroga it is longer than the 
vasa efferentia and somewhat stouter. In Phormia, Protophormia, 
and Apaulina it is twice as long as the testes and tapered to the 
insertion in the oval ejaculatory bulb. In Calliphora it is not 
