SUBFAMILY RHINIINAE 93 
the greater ampulla with thin tawny pile; mesospiracle with 
white hair; under surface of scutellum with fine white pile. 
Legs black, silvery pollinose; anterior coxa with white pile. 
Wing hyaline; subcostal sclerite with white pubescence; basi- 
costa black; squamal lobes white, the upper hyaline on apical 
half. 
Abdomen brownish black, slightly olivaceous green, silvery 
pollinose in certain lights and shining in others; black at bases 
of setae; first segment black on dorsum, second to fourth seg- 
ments each with large yellowish lateral spots; ventrally mostly 
yellowish. | 
Genital segments black, shining, with seattered black hair. In- 
ternal anatomical features (pl. 14, D, E, and F) as illustrated. 
Female. Head height 10.0; width 12.0; length at antenna 
5.0, and at vibrissa 6.0; eye height 6.4; bucea 0.53 of eye height; 
width of front at vertex 0.380 of head width, 0.40 at lunule; 
parafaciale 1.6 in width opposite lunule; third segment of anten- 
na slightly more than twice as long as second. Otherwise similar 
to male except for normal sexual differences. 
Length. 6-7 mm. 
Distribution. Holaretic: Southern Europe, northern Africa, 
southern Asia, North America. 
The species evidently occurs in North America only on the 
island of Bermuda. Although I collected on many of the islands 
in the Caribbean over different seasons, especially in the Bahama 
eroup, No specimens were ever seen. One specimen which was 
collected in September 1922 is in the American Museum of Na- 
tural History. Dr. Curran informs me that the species is not 
rare in Bermuda. 
Biology, habits and immature stages. Portschinsky (1894, pp. 
120-121) reared lunata as a parasite of egg pods of certain species 
of Palearctic Acrididae. Senior-White (1923) confirmed this 
observation in India. Williams (1933, p. 473) reported that 
lunata was the chief natural enemy of locusts in Kenya, Africa, 
and Cuthbertson (1933) found up to 95 percent of the locust egg 
pods in Rhodesia, South Africa, were preyed upon by this species. 
It thus appears quite certain that lunata departs from the gen- 
eral saprophagous habit of the Calliphoridae in being predaceous 
in the egg capsules of certain locusts. As many as 50 eggs of 
lunata have been found in a single egg capsule of the host. Ac- 
cording to Potgieter (1929), the flies are very active at the time 
of oviposition by the host and as soon as one of the latter with- 
draws its abdomen from the ground, the female flies rush to the 
spot and deposit eggs in the still fluid covering of the egg mass. 
