AET. 10. PUPAKIA OF 100 MUSCOID FLIES GREENE. 29 



touching and located on the longitudinal axis. Button large, round, 

 close to inside edge- Anal opening small, remote from spiracles. 

 Length, 3.75 mm. ; diameter, 1.5 mm. 



77. DICHAETONEURA LEUCOPTERA Johni»n. 



Medium size; subshining, yellowish red. Spiracles black, sub- 

 shining, separated by a space equal to about one-third the width of 

 one plate. Each plate has three short slits toward the outer edge, 

 each on a very narrow, poorly defined ridge. Button large, round, 

 somewhat indistinct. Spiracles located below the longitudinal axis, 

 but just about touching it. Anal opening very small, far below the 

 spiracles. 



Length, 6 mm. ; diameter, 2 mm. 



78. TACHINA RUSTICA Meicen (Exorista simnlans Meigen). 



Small to medium; dull, yellowish red. Spiracles shining black, 

 red in the center, widely separated, space nearly equal to width of 

 one plate. Each plate has three yellowish slits, each on top of a 

 well-defined ridge. Button large, round, and blackish. Spiracles 

 very slightly above the longitudinal axis. Between the spiracles, at 

 the pole, is a diamond-shaped elevation with a depression in the 

 center. Anal opening small, far below the spiracles. 



Length, 5 to 6.5 mm. ; diameter, 2 to 2.5 mm. 



79. TACHINA ROBUSTA Townsend (Tachinomyia robujita Towngend). 



Medium to large size; dull, reddish to nearly black, finely rugose. 

 Spiracles shining black, widely separated, space nearly equal to 

 width of one plate. Each plate has three reddish-yellow slits, each 

 slit on top of a well-defined ridge, which is striated ; inner slit notice- 

 ably larger than the other two. Spiracles far above the longitudinal 

 axis. Area around the spiracles with larger rugosities. Anal open- 

 ing small, far below the spiracles. 



Length, 6.5 to 12 mm. ; diameter 3 to 5.5 mm. 



80. MASICERA MYOIDEA Desvoidy. 



Medium-sized; dull, dark red, with a grayish tinge, nearly smooth. 

 Spiracles shining black, slightly raised above the surface, separated 

 by a distance equal to about one-half of one plate. Each plate has 

 three slits. Button small, round, well defined. Spiracles located 

 on longitudinal axis. Anal opening small, far below the spiracles. 



Length, 7.5 mm. ; diameter, 3 mm. 



81. STURMIA NIGRITA Townsend. 



Medium size, elongate; dull, dark red. Spiracles black, sub- 

 shining, slightly raised above surface, separated by a distance equal 

 to one-half the width of one stigmal plate. Each plate has three 

 3136— 22— Froc.N.M.Vol.60 26 



