204— THE Buowr.ies or NortH AMERICA 
margin of first sezgment; no discal or median marginal bristles 
on intermediate segments; third and fourth segments each with 
a marginal row of erect bristles; fourth segment also with erect 
discal bristles. 
Genital segments of medium size, first segment largest and 
rather flattened dorsally in profile; both segments with abundant 
erect black hair. ~ 
Calliphora coloradensis Hough 
Calliphora coloradensis Hough, Zool. Bull. 2(6) :286, 1899; 
Parker, Mont. State Bd. Ist Ent. Bien. Rpt.: 44,1914; 
Bishopp, Jour. Eeon. Ent. 10:273, 1917; Shannon, Insecu- 
tor Inscitiae Menstruus 11:109, 1928; Walton, U. S. Natl. 
Mus. Proce. 48(2070) :175, 1915; Parker, Ent. News 28:281, 
1917; Pierce, Calif. State Dept. Agri. Sacramento, Spec. 
Pub. 22:9, 1922; Wilson, Science 77:560, 1933; Cushing and 
Patton, Ann. Trop. Med. and Parasitol. 28(2) :211,213, 1934; 
Parish and Cushing, Jour. Econ. Ent. 31(6) :750-763, 1939. 
(Type, male from Colorado, in the Field Museum of Natural 
History. ) 
Male. Head height 13.5; eye height 8.8; length of head at 
vibrissa 8.1 and at antenna 7.8; bucea 0:44 eye height, red orange 
on anterior half or more, with thin gray pollen and with black 
hair, no pale hair before the metacephalic suture; frontale black 
posteriorly, sometimes reddish toward lunule, slightly silvery, 
twice as wide as parafrontale at narrowest and widening toward 
lunule; head width 16.6; front at narrowest 0.138 of head width, 
0.20 at vertex and 0.30 at lunule, black, covered with dense sil- 
very pollen, and with only a few hairs posteriorly but with con- 
siderable long thin hair anteriorly outside frontal row; vertex 
slightly silvery; frontal row consisting of about 10 bristles, those 
toward vertex thin and hair-like, the rows diverging anteriorly 
to the middle of the parafaciale, and descending to a point 
nearly opposite the middle of the second antennal segment; 
elypeus orange, silvery toward antennal base; carina vesti- 
oial; parafaciale 2.9 in width opposite lunule, black, with heavy 
silvery pollen and with black setae in a central area that extends 
well below the middle; faciale yellow orange, with several rows 
of weak black setae which ascend fully two-thirds the distance 
to the antennal base; vibrissae separated by 3.3; palpus bright 
orange; second antennal segment yellow orange to orange brown, 
third segment 4.8 times as long as second, orange at base, orange 
brown to dark brown apically, and reaching four-fifths the dis- 
