CORDYLURA. 149 



SUBFAMILY 1. HELOMYZIDES. 



Scatomyzides, Fal., et Helomyzides, Fal. 



Alee vix unquam maculates, areolis pobrachiali et anali sat longis. Abdo- 

 men sessile. Pedes mediocres. 

 Wings very generally without marks. Pobrachial and anal areolets 



ratJier long. Abdomen sessile. Legs of moderate length. 



a. Tip of the abdomen thickened in the male, compressed in the female. 



1. CORDYLURA. 



a a. Tip of the abdomen not thickened nor compressed. 

 b. Proboscis smooth, shining, pointed. 2. SCATOPHAGA. 

 b b. Proboscis not smooth, nor shining, nor pointed. 



c. Third joint of the antennae elongate-conical, shorter than the 

 second. 



d. Hind femora armed beneath with spines. 12. SEPEDON. 

 d d. Hind femora without spines or bristles. 13. DORYCERA. 

 c c. Third joint of the antennae nearly round, not longer than the 

 second. 



d. Body depressed, coriaceous. 3. CCELOPA. 

 d d. Body not depressed nor coriaceous. 5. ACTORA. 

 c c c. Third joint of the antennae longer than the second. 

 d. Second joint of the antennae short. 



e. Third joint of the antennae round, a little longer than the 

 second. 



/. Costal vein armed with spines. 8. LERIA. 

 //. Costal vein unarmed. 9. HETEROMYZA. 

 e e. Third joint of the antennae conical, much longer than the 

 second. 



/. Body depressed, coriaceous. 4. ORYGMA. 

 //. Body not depressed nor coriaceous. 6. SCIOMYZA. 

 e e e. Third joint of the antennae conical, twice the length of 

 the second. 



/. Wings of moderate length. 7. HELOMYZA. 

 //. Wings long. 10. DRYOMYZA. 



d d. Second joint of the antennae generally long ; third rarely 

 shorter than the second ; hind femora beset with bristles. 

 11. TETANOCERA. 



Genus I. CORDYLURA. 



CORDYLURA, Pal. Scat. 6 (1819) ; Meig. ; Mcq. ; Zett. Musca p., L. ; 

 F. ; Gmel. Ocyptera p., F. Mosina, Norellia, Phrosia, Nupharia, 

 et Delina, Desv. 



Corpus angustum, cylindricura, setosum. Caput subrotundum. Frons 

 lata. Proboscis brevis. Palpi filiformes, vel subfiliformes. Antennae 



