SUBFAMILY CALLIPHORINAE 
The typical bluebottle and greenbottle flies belong to this sub- 
family. All the species have the prosternum and the propleuron 
setulose, the parafaciale bare on the lower third or more, and 
are without crinkly hair on the thorax. The presence or absence 
of pile on the upper surface of the lower squamal lobe divides 
the subfamily into the tribes Luciliini and Calliphorini in North 
America. While the two tribes appear to be very dissimilar upon 
superficial examination, and certain authors have accorded each 
subfamily rank, well-defined characters to separate them have 
not been found. Characters supporting supergeneric differentia- 
tion are often difficult to find and such groups become less dis- 
tinct as additional material is studied. It is possible, however, to 
indicate the relationships among the several genera in the Cal- 
liphorinae by the following tribal characterizations: The Lu- 
ciliini includes small to average-sized, somewhat shining bronzy 
gereen (color plate III) or blue-green to purple species. The 
tribe Calliphorini includes small to large species with pollinose 
thoraces and shining to pollinose metallic greenish to bluish 
abdomens (color plate IV). Most of the species belonging to this 
subfamily are saprophagous, although a few are parasitic upon 
toads or earthworms, and several others may be found as tertiary 
blowflies in cases of myiasis. 
It must be remarked here that representatives of this sub- 
family are not abundant in the tropics. Not only are there few 
species but those that may be found there are not particularly 
abundant. Of all of the species included herein, only a few of 
the species of Phaenicia, one of the genus Calliphora, and Cyno- 
myopsis cadaverina (R.-D.) apparently occur in Central Ameri- 
ca. Of the last two species, these apparently occur with fre- 
quency only in the Mexican highlands. I did not see them in the 
mountains of Guatemala, Honduras, or Nicaragua. 
The North American representatives of this subfamily possess 
the following characters in common. 
Male and female. Head width greater than head height; epi- 
stoma warped forward from clypeal plane; bucea usually high 
in relation to eye height; vibrissae at or but slightly above the 
oral margin and well separated; faciale convex in profile; eye 
ovate and set more or less obliquely in head; outer vertical 
bristles (ef. Eucalliphora) and proclinate frontoorbital bristles 
usually absent in male; parafaciale bare on lower fifth or more; 
postocellar and postvertical bristles weak and proclinate; front- 
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