SuBFAMILY CHRYSOMYINAE 179 
APAULINA, NEW GENUS 
(Bird nest screwworm flies) 
Protocalliphora Hough, Ent. News 10:66, 1899 (in part); Bezzi, 
Parasitol. 14:32, 1922; Shannon, Insecutor Inscitiae Men- 
struus 11:107, 1923; Shannon and Dobroscky, Wash. Acad. 
Sei. Jour. 14:249, 1924; Dobroseky, Biol. Bull. 48(4) :275, 
1925; Shannon, Wash. Ent. Soe. Proc. 28(6) :128, 1926; 
Séguy, Eneyel. Ent. (A) 9:161, 1928; Eneyel. Ent. (BII.) 
Dipt. 5:63, 1929; Townsend, Manual of Myiology, vol. 2, 
p. 168, 1935; ibid., vol. 5, p. 166, 1937. 
Phormia (Protocalliphora). Villeneuve, Soc. Ent. de Belg. Bull. 
et Ann. 68:148, 1928; Konowia 10:72-73, 1931 (in part). 
The genus Protocalliphora Hough does not occur in North 
America. North American bird parasites previously included 
by various authors in this genus should be referred to Apaulina 
since they differ from species of the Palearctic genus Protocall- 
phora by the characters given in following key. 
1. Middle of postalar declivity without tuft of hair or setae; 
tympanic membrane or pit bare; scutellum without apical 
bristles (except in sapphira); remigium without cilia 
basally below; fore tibia usually with one posterior bristle. . 
Middle of postalar declivity with tuft of hair in middle; 
tympanic membrane or pit setose; scutellum with apical 
bristles; remigium basally below with cilia; fore tibia with 
two posterior bristles............ Protocalliphora Hough. 
In addition to the above characters, species of Apaulina appear 
to be considerably smaller and with heavier silver pollen, than 
the species of Protocalliphora. 
Male and female. Head (pl. 4, C) wider than high; length at 
oral margin and at vibrissa approximately equal; metacephalon 
gently rounded in profile, and only slightly produced behind; 
bucea less than one-third eye height and with numerous setae; 
front narrowed on middle in male, wider and the margins nearly 
parallel in female, facial carina absent; parafaciale hirsute in 
middle above; faciale with two or three rows of ascending 
bristles; vibrissae above oral margin by 0.4 to 0.75, somewhat 
approximated and slightly closing epistoma which is gently 
warped forward from the eclypeal plane; palpus clavate; anten- 
nal bases at or near eye-middle when head is viewed in profile, 
bases approximated; arista with penultimate segment as long as 
