ART. 21 ACALYPTRATE FLIES MALLOCH 23 



Genus SAPROMYZA Fallen 



SAPROMYZA ORNATA Schincr 



This is a rather aberrant species, of a general testaceous yellow 

 €olor, the frons entirely shining, face with a pair of submedian ver- 

 tical dark lines, the abdomen with a series of dorsocentral spots and 

 larger transverse lateral marks black, the latter least distinct on 

 tergite 3 and most distinct on tergite 4; fore femora darkened at 

 apices on anterior surface. Wings yellowish, outer cross vein and 

 apex faintly darker. 



Anterior orbital bristle rather small, far from eye; ©cellars prac- 

 tically absent ; arista short haired. Thorax with two pairs of dorso- 

 central bristles and one pair of prescutellar acrostichals ; anterior 

 sternopleural very small; scutellum convex. Fore femur without 

 anteroventi'al comb. Inner cross vein at middle of discal cell; pen- 

 ultimate section of fourth vein fully three-fifths as long as ulti- 

 mate one. 



Length, 5.5-6 mm. 

 . Two specimens, Higuito, San Mateo, Costa Rica (P. Schild). 



SAPROMYZA UMBROSA Loew 



Specimens of this North American species are before me from 

 Higuito, Costa Rica, and Panama Canal Zone, which differ little 

 from those obtained in the vicinity of Washington, D. C. 



SAPROMYZA NIGROAPICATA, new species 



Female. — Frons brown, yellow across anterior margin, ocellar spot 

 and orbits fuscous, face brownish testaceous, parafacials white 

 pruinescent, a dark spot between base of each antenna and eye; oc- 

 ciput black, upper central third yellowish brown, entire head shin- 

 ing; basal two antennal segments black, third missing in type; palpi 

 fuscous; cheeks yellow. Thorax and scutellum shining black 

 above, sides of mesonotum becoming yellowish, pleura testaceous 

 yellow, darkened above. Abdomen brownish testaceous, shining, 

 paler on venter. Legs yellow testaceous, apices of all femora con- 

 spicuously but narrowly blackened, extreme bases of tibiae slightly 

 dai'kened. Wings hyaline. Ilalteres yellow. 



Ocellar bristles short, postverticals long, widely separated; an- 

 terior orbital much shorter than posterior one; frons without sur- 

 face hairs; eye narrowed below; cheek linear. Thorax with tAvo 

 pairs of dorsocentrals and one strong pair of prescutellar acrosti- 

 chals; intradorsocentral hairs in about eight series; scutellum elon- 

 gate, flat above, sides rounded or bevelled off, bristles equal. Fore 



