ART. 12 KEYS TO SAPROMYZIDAE MALLOCH AND McATEE. 3 



Yalle3\ These facts of occurrence when not expressed in the detailed 

 records are indicated by the abbreviations P. I. and V. P. I. 

 respectively. 



Previously described species, not yet collected, that should be ob- 

 tainable in our region are: Steganolauxania l<Ltipennis Coquillett, 

 New Jersey to Florida; Lauxaniella opaca Loew, New Jersey to 

 Florida ; and Sapromyza resinosa Wiedemann, New York to Florida. 



Family LONCHAEIDAE. 



Only one genus of this family has hitherto been recognized in 

 North America, but there is every reason to believe that the group 

 EaroTnyia Zetterstedt is entitled to at least subgeneric rank. Three 

 of the species {abei'i^ans^ aten'ina^ and nigrociliata) included in this 

 paper belong to Earomyia^ having the frontal lunule bare, but they 

 are included in the key to species of Lonclxdea to facilitate identifi- 

 cation and establish relationships. 



The genotype of Lonchaea is vaginalis Fabricius, which has been 

 stated bv some European authors to be synonymous with chorea 

 Fallen. ^ 



The genotype of Earomyia is loncliaeoides Zetterstedt, which for 

 some obscure reason was renamed frontata by Becker in 1895. 



The following key includes all species known to the authors to 

 occur in North America. Some other species which have been 

 recorded, w^e have not seen and do not attempt to include. 



Genus LONCHAEA Fallen. 



KEY TO SPECIES. 



1. Frons iu both sexes with large irregular pits or depressions; a strong bristle 



near anterior margin of cheek vibrissata Mulloch. 



Frons impunctate or almost so, not pitted 2 



2. Several bristly hairs surrounding the stigmatal bristle 3 



No hairs surrounding stigmatal bristle 11 



3. Fringes of calyptrae black or fuscous 4 



Fringes of calyptrae white or yellow 9 



-i. Third antennal segment much less than twice as long as its greatest width; 



frontal lunule bare ; ovipositor abnormally wide aterrima Malloch. 



Third antennal segment over twice as long as wide ; frontal lunule with 



some hairs 5 



5. Eyes in both sexes distinctly hairy, in the male conspicuously so ; second 



costal division very long; disk of scutellum hairy 6 



Byes bare or almost so 7 



G. Pteropleura hairy in center; cheeks with dense short erect fine hairs. 



pleurlseta Malloch. 



Pteropleura bare; cheeks with longer setulose hairs ursina Malloch. 



7. Tarsi entirely black atritarsis Malloch. 



Tarsi largely yellowish 8 



45554— 25— Proc.N.M.\ ol.65 25 



