334 NORTH AMERICAN DIPTERA 



Family Phyllomyzidae 



Small flies, usually black, sometimes silvery pollinose. 



Costa broken at the humeral crossvein and at the apex of the 

 auxiliary vein; postoeellar bristles convergent or parallel; anterior 

 frontals convergent, the others divergent, proclinate or reclinate; inter- 

 frontals present or there are rows of hairs; oral vibrissee present though 

 sometimes but poorly differentiated from the other bristles; proboscis 

 long and geniculate, or short; antennse not elongate, often small. Meso- 

 notum with one to four pairs of dorsocentrals; mesopleura Avith or 

 without bristles; pteropleura sometimes with distinct bristles. Legs 

 moderately short. First vein ending near the basal third of \\\e wing; 

 second basal and anal cells small; posterior crossvein absent in Para- 

 myia; costa usually bristly basally. Abdomen short and rather broad, 

 the bristles weak or absent. 



These flies were included by Williston in the Agromyzidse while 

 other authors have recognized the Milichiida^ and Carnidae. Phyllo- 

 mijza is an older generic name than Milicliia and I do not consider the 

 differences between the genera placed in the Carnida? and Phyllo- 

 myzida? as of more than generic value. 



The adults are rather common and may frequently be found on 

 fence posts, fences, logs, tree-trunks, etc. in the hot sun, or they may 

 be taken by sweeping, on foliage or in grass. I have collected them only 

 during dry weather and always in the bright sunlight. Keys to the 

 species will be found in Melander's revision of the family,* and in a 

 paper by Mallochf. 



KEY TO GENERA 



1. Posterior crossvein present 2 



Posterior crossvein absent (4, 26) Paramyia Williston 



2. Costa extending to the fourth vein 5 



Costa stopping at the third vein 3 



3. Proboscis very elongate and geniculate (3, 20) Aldrichiella Hendel 



Proboscis short 4 



4. Mesopleura bare (2, 9, 13) Euchlorops Malloch 



Mesopleura with two or three bristles (6, 21) Meoneura Rondani 



* 1913. Journ. N. Y. Ent. Soc, xxi, pp. 234-246. 

 t 1913, Pioc. U. S. N. M., xlvi, pp. 127-152. 



