SUBFAMILY CALLIPHORINAE 299 
north as British Columbia and Ontario. Most abundant in the 
central part of the United States during April 15 to May 1. 
Biology, habits and immature stages. Egg. As described for 
vicina. 
Larva. Third instar: Segments 2 to 8 with anterior spinose 
bands complete, segments 9 to 12 bare anterodorsally, segments 
2 to 5 bare posteriorly, segments 10 and 11 with complete pos- 
terior bands of spines, segments 2 to 9 bare posterodorsally, seg- 
ment 12 bare dorsally. Posterior depression with inner and 
outer tubercles on dorsal margin largest and of about equal 
size, the median smaller and closest to inner; outer tubercle on 
ventral surface largest, the median nearly as large, inner tuber- 
cle smallest, the median and outer set closest together. Anterior 
spiracles each with about 8 circular orifices; posterior spiracles 
(pl. 43, A) each with three slit-like apertures as illustrated, the 
“‘button’’ small, the peritreme well pigmented. Cephaloskeleton 
(pl. 48, B) with basal portion of labial sclerite about as wide as 
length of apical tooth-like portion, the length of the entire 
sclerite about two times the width of the basal portion. 
Puparium. With most of the external characters of the third 
instar larva. 
The species is saprophagous as are all the species of Calli- 
phora. Johnson (1932) reared adults of livida, June 25, 1931, 
at Groton, Mass., from a nest of barn swallows, containing sev- 
eral dead nestlings. My larvae were reared upon decomposing 
meat. This form appears to be abundant during the spring 
months in Middle Western states. Adults may be trapped 
over beef until late in April. The species is not abundant dur- 
ing fall months. The National Collection contains specimens 
collected during February, March, April, June, and October. 
Calliphora mortica Shannon 
Calliphora mortica Shannon, Insecutor Inscitiae Menstruus 
11:109, 1923. (Type, male from Kodiak, Alaska, No. 26126, 
U. S. National Museum. ) 
A small species with the general habitus of terrae-novae and 
vomitoria but with entire head, except faciale, palpus and sec- 
tions of antennae, black. 
Male. Head height 10.8; eye height 8.0; bucca 0.34 of head 
height, head totally black, with thin grayish pollen, and with 
black hair, no pale hair before the metacephalic suture; frontale 
reddish anteriorly, obliterated at narrowest (just anterior to 
ocellar triangle), widening to fully three times as wide as para- 
