AMERICAN DIPTERA. 403 



same species as type, namely aterrima. Seeing, therefore, that Tri- 

 neura was a synonym of Phora, some years later (Syst. Beschr., vi. 

 212), Meigen distinctly says that his Trineura is a synonym of 

 Phora, which has precedence; it is on this account that lie puts all 

 the species under Phora, dropping Trinevra entirely. 



From these facts it can lie seen that a strict application of the 

 rule of priority would necessitate the removal of Trineura. As ii 

 would cause needless confusion, however, to restore Phora to i t> 

 proper position at this late date, I have thought it best to follow 

 Becker's recent work and retain Trineura. 



EXPLANATION OF PLATES. 



PLATE V. 



Figure 1. Phora pachyneura Lw. Wing. 

 " 2. Phora pachyneura Lw. Hypopygium of male. 

 " 3. Phora fratercula sp. nov. Wing. 

 " 4. Phora thoraeia Meig. Wing. 

 " 5. Phora spinipes Coq. Wing. 

 " 6. Phora spinipes Coq. Hind tibia. 



7. Phora olympise sp. nov. 



8. Phora scutellata sp. nov. 



" 9. Phora multiseriata sp. nov. Wing. 



" 10. Phora multiseriata. Hind leg. 



" 11. Phora scutellata sp. nov. Hind leg. 



*' 12. Phora comstocki sp. nov. Wing. 



" 13. Phora luggeri Aid. Wing. 



PLATE VI. 



" 14. Phora niiiilifrons sp. nov. 



" 15. Phora cimbicis Aid. Wing. 



'■' 16. Phora incisuralis Lw. Wing. 



" 17. Phora gramlandica Lund. Wing. (After Lundbeck.) 



" 18. Hypocera johnsoni sp. nov. Wing. 



" 19. Hypocera johnsoni. Head seen from the front. 



" 20. Hypocera ehrmanni sp. nov. Wing. 



" 21. Hypocera femoral a Meig. Wing. 



" 22. Hypocera clavata Lw. Hind leg. 



" 23. Hypocera clavata. Wing. 



" 24. Hypocera grenadensis sp. nov. Wing. 



25. Aphiochseta epirse Brues. Wing. 



'' 26. Aphiochseta pygmsea Zett. Wing. 



" 27. Aphiochseta obscusra p. nov. Wing. 



TRANS. AM. ENT. SOC. XXIX. DECEMBER. 1903 



