ART. 10. PUPARIA OF 100 MUSCOID FLIES GREENE. 23 



50. ACEMTIA DENTATA Coquillett (Acemyiopsis dentata Coquillett). 



Medium size; dull, blackish red, very finely rugose; posterior end 

 slightly tuberculate. Spiracles black, protuberant, touching at the 

 base; apex separated by a space nearly equal to the width of one 

 plate ; the sides roughly granular ; apex shining, divided into three 

 lobes. The slits are yellowish and located on these lobes. Button 

 large and round. Spiracles located above on the longitudinal axis. 

 Anal opening located below, about the length of one stigmal plate. 



Length, 6 mm. ; diameter, 2.75 mm. 



51. EUTRIXA EXILE CoquUlett. 



Medium size; shining, dark red; posterior end greatly enlarged; 

 anterior half of the dorsum with a deep depression. Spiracles black, 

 on small tubercles, which have a granular surface. Spiracles widely 

 separated, the distance nearly equal to twice the basal diameter of 

 the tubercles. Each stigmal plate has three slits, each one of which 

 is on top of a sharply defined ridge. Button small, round, located on 

 upper edge. Spiracles located far above longitudinal axis. Anal 

 opening large, located just below the longitudinal axis. 



Length, 7 mm. ; diameter, 2.75 mm. 



52. PHOROCERA ERECTA Coquillett. 



Medium-sized; subshining, yellowish red. Spiracles shining, 

 mostly dark, yellowish red, blackish around the edge, widely sepa- 

 rated, the space equal to about three-fourths the width of one plate. 

 Each plate has four slits. The three upper ones are concaved and the 

 lower slit convex. Each slit on top of a broad, yellow, flat ridge. 

 Button very large, round, reddish yellow. Spiracles are located 

 very slightly above the longitudinal axis. Anal opening large, far 

 below the spiracles. 



Length, 5.5 mm. ; diameter, 2 mm. 



53. CRYPTOMEIGENIA THEUTIS Walker. 



Medium to large size; dull, dark red; concave on the dorsum; 

 spiracles shining black, distinctly raised above the surface, well 

 separated, the space equal to the width of one plate. Each plate has 

 six (rarely five) nearly straight, deep-yellow slits. Button large, 

 round, well defined. Spiracles located above the longitudinal axis, 

 a little more than the length of one stigmal plate. Anal opening 

 large, far below the spiracles. 



Length, 6.5 to 9 mm. ; diameter, 2.75 to 4.5 mm. 



64. BIOMYIA LACHNOSTERNAE Townsend (Viviania lachnoatemae Townsend). 



Medium size; subshining, dark red; posterior end much larger 

 diameter than the anterior end. Spiracles shining black, slightly 



