ART. 29 IMMATURE STAGES OF SARCOPHAGID FLIES GREENE 13 



their base toward the third slit, which is straight; middle slits 

 parallel; spiracular plates are separated by a space about half the 

 widtli of one plate. Below the posterior cavity is a rounded area 

 in the middle of which is the anal opening; each side of the anal 

 opening is a distinct rounded tubercle, the space between these tu- 

 bercles is about the width of one tubercle at its base. Anterior 

 spiracles near the apex of the puparium; each spiracle has nine 

 lobes in a slightly curved line. 



Length, 9 mm. ; diameter, 3.5 mm. 



Ithaca, New York; emerged July 15, 1922; R. C. Shannon. Reared 

 from rabbit caught by R. Harwood. 



17. SARCOPHAGA ACULEATA Aldrich 



Large sized, dull, yellowish red to dark red. Posterior cavity not 

 very deep, small, elliptical, located just above the horizontal axis; 

 tubercles on the edge of the cavity indistinct; on the dorsum above 

 the cavity is a faint depression (seen from lateral view). Each 

 spiracular plate is shining, deep red with three large, yellow slits 

 pointed at the posterior end ; middle slits are almost parallel ; spirac- 

 ular plates are separated by a space equal to about one-third the 

 width of one plate. Anal opening small, darkened, and faintly 

 depressed; no anal tubercles; between the anus and the cavity is a 

 large depression, sometimes this depression appears more like two 

 depressions with a faint elevation between them; below the anus is 

 a depression or fold reaching up on each side nearly to the horizontal 

 axis. Anterior spiracles located near to the apex of the puparium: 

 each spiracle has five yellow lobes; basal portion of spiracle is dull 

 reddish. 



Length 8-8.5 mm.; diameter, 2.75-3 mm. 



Reared from an Acridid species at Alpine, California; C. M. 

 Packard, collector. Pasadena No. 16163, July 21, 1916. Ashland, 

 Nebraska, August 14, 1914, from grasshopper; W. E. Pennington, 

 collector; exp.. No. A 787. Ellis, Kansas, no date; from E. opaca; 

 J. S. Wade, collector; Webster, No. 14258. 



18. SPIROBOLOMYIA SINGULARIS Aldrich 



Medium to large sized; dull yellowish to red. Posterior cavity 

 deep, broadly elliptical, located about centrally on the horizontal 

 axis; tubercles around the edge of the cavity indistinct; on the dorsal 

 part of the puparium, close to the cavity is a faint depression. Each 

 spiracular plate dull, reddish to black, with three narrow yellow 

 slits, the two middle slits very slightly converging toward the apex; 

 on the inner edge of the spiracular plate, near the base, is a slight 

 projection: spiracular plates separated by a space about equal to 

 9121—25 3 



