ART. 29 IMMATUEE STAGES OF SABCOPHAGID FLIES GREENE 17 



tubercles. Anterior spiracles located close to the apex of the pu- 

 pariiim; each spiracle is wider than high and with 12 yellow lobes; 

 basal j)ortion is dark reddish. 



Length. 5-6 mm. ; diameter, 1.5-2 mm. 



Chain Bridge. District of Colmnbia. Reared August 17, 1912, 

 from AJJorrhina nitida; C. T. Greene, collector. 



27. SARCOPHAGA ULIGINOSA Kramer 



Medium sized, dull, dark red. Posterior cavity medium sized, 

 elliptical, located centrally on the horizontal axis; three indistinct 

 tubercles on each side of the cavity above the center line. Each 

 spiracular plate is shining dark red with three yellow, narrow slits; 

 middle slit straight ; the first or inner slit parallel with the second 

 for the first half of its length and then the first slit bends diagonally 

 toward the second and reaches a little beyond it; outer slit almost 

 as long as the middle one; spiracular plates separated by a space 

 equal to about one-third the width of one plate. Anal opening lo- 

 cated in a transverse depression a short distance below the cavity. 

 Anterior spiracles close to the apex; each spiracle has 30 small, yel- 

 low lobes, with the central portion of the spiracle deep reddish. 



Length, 8 mm.; diameter, 3 mm. 



Gipsy Moth Laboratory, 548B; May 14, 1907. In collection of 

 R. R. Parker. 



28. SABCOPHAGA DAVIDSONI CoquUlett 



Medium sized, dull, yellowish red. Posterior cavity nearly round 

 beloAv, but touching the horizontal axis ; tubercles on edge not visible ; 

 there are a few, short, visible wrinkles on the lower edge of the 

 cavity. Each spiracular plate shining, dark red, with three yellow 

 slits and the lobes distinct; middle slits nearly parallel; spiracular 

 plates separated by a space slightly greater than the width of one 

 plate. Anal opening small, depressed, with a darkened area around 

 the edge, located some distance below posterior cavity; no anal tu- 

 bercles. Anterior spiracle located below the anterior end of the 

 puparium; each spiracle has six small, yellow lobes; basal portion 

 of spiracle is deep reddish. 



Length, 6 mm.; diameter, 2.5 mm. 



Los Angeles, California. Reared from eggs of Epeira argentata^ 

 September, 1893; Anstruther Davidson, collector. 



29. SARCOPHAGA PROHIBITA Aldrich 



Medium sized, dull, reddish brown. Posterior cavity small, deep, 

 somewhat hexagonal, located on but mostly below the horizontal 

 axis; tubercles on the edge indistinct. Each spiracular plate shin- 

 ing, deep red with three yellow slits; middle slits about parallel; 



