196 THE BLowFulEs oF NortH AMERICA 
A paulina hirundo (Shannon and Dobroscky), new combination 
Protocalliphora splendida var. hirundo Shannon and Dobroscky, 
Wash. Acad. Sei. Jour. 14:251-252, 1924. (Type, male from 
Stratford, Wash., No. 26859, U. S. National Museum). 
Male. Head width 138.0; head height 10.2; eye height 9.0; 
leneth at antenna 6.6 and at vibrissa 6.1; buecca 0.19 eye height; 
parafaciale opposite lunule as wide as distance between vibris- 
sae in proportion 1.6:1.6; front at narrowest 0.10 head width, 
0.19 at. vertex and 0.34 at lunule; with coloration and chaetotaxy 
of stalia and metallica. Male genital segments with internal 
features (pl. 22, A and B) as illustrated. | 
Female. Head width 138.0; head height 10.0; eye height 7.7; 
length at antenna 6.6 and at vibrissa 6.2; parafaciale opposite 
lunule as wide as distance between vibrissae in proportion 2:2; 
front at vertex (which is narrowest) 0.28 head width, 0.388 at 
lunule; coloration of sialia. Otherwise as in male except for the 
formal sexual characteristics. 
Distribution. Nearctic: Washington and British Coluithia! 
The type series, comprising three males and five females, was 
collected from a nest of Petrochelidon albifrons albifrons ( Raf.) 
(Northern Cliff Swallow), on July 4, 1920, by R. C. Shannon, 
who found many of the nests examined to contain dead young 
birds. Five specimens were reared from larvae collected in a 
nest of the same host on August 16, 1987, at Kamloops, British 
Columbia, by G. J. Spencer. 
Apaulina metallica (Townsend), new combination 
?Calliphora splendida Macquart, Diptéres exotiques, sup. 1, p. 
196, 1846; Harbeck, Ent. News 18:216, 1908. (Types tite: 
male Fireag Galea: Tex., apparently lost). 
Phormia metallica Townsend, Ent. Soc. Amer. Ann. 12 376, 
1919. (Type, female from Fredonia, N. H., in U. S. Na- 
tional Museum). 
Protocaliphora metallica (Townsend) Bezzi, Parasitol. 14:33, 
1922; Shannon, Insecutor Inscitiae Menstruus 11:107, 1923. 
Protocalliphora splendida (Macquart) Shannon and Dobroscky, 
Wash. Acad. Sci. Jour. 14:252, 1924; Johnson, Boston Soe. 
Nat. Hist. Occas. Papers, 7(15) :216, 1925; Bull. N. E. Bird- 
banding Assoc. 1:53, 1925; Séguy, Ene. Ent. Dipt. 2:86, 
1925; Woods, Bull. N. E. Birdbanding Assoe. 2:12, 1926; 
Johnson, Bull. N. E. Birdbanding Assoc. 3:2, 1927; Lloyd, 
Canad. Field Nat. 12:3, 1927; West, in Leonard, Mem. 101, 
