40 THE BLOWFLIES oF NortH AMERICA 
As stated by other authors, the genotype of Musca is vomitoria 
Linnaeus by designation of Latreiile (1810, p. 444). There is no 
question that the designation was a valid one under the Rules. 
When the economic importance of the common housefly became 
recognized early in the present century, Townsend designated 
domestica Linnaeus as genotype of Promusca, realizing that 
vonutoria and domestica are but distantly related. But the name 
Musca domestica had become of world-wide interest within a 
period of about 20 years, and, in order to preserve this well- 
publicized combination, the International Commission on Zoolo- 
gical Nomenclature suspended the Rules for the acceptance of 
domestica as genotype of Musca (Opinion 82), notwithstanding 
the fact that vomitoria stood as genotype for Musca for well over 
100 years. In accordance with the ruling of the Commission, 
vomitoria is therefore accepted as the genotype. of Calliphora. 
The species included here under the subfamilies Mesembrinel- 
linae and Rhiniinae are aberrant in the Calliphoridae. They 
have been placed with Pollenia and others in a separate family 
recently, but Pollenia shows affinities to Calliphora which are not 
possessed by Mesembrinella or Rhinia. Both are treated in the 
traditional sense because of the similarity of the genitalia. More 
information on their biology and immature stages may eventually 
indicate more clearly their true relationships. 
The affinities of Phormiini and the Phormia-like species are not 
yet entirely clear. These species seem to be more closely related 
to the Calliphorini than to the Chrysomyini, but no very definite 
evidence to support this conclusion was found. On the contrary, 
characters of the larvae and the ciliate remigium lead me to 
place them with the Chrysomyinae. 
