170 THE CANADIAN ENTOMOLOGIST. 



ridge which separates the tergum from the venter on these segments ; the 

 thoracic segments extend farther ventrad on the sides. Legs apparently 

 4-jointed, corneous, first two joints moie or less amalgamated, fourth 

 shorter than third, terminated by a hooked claw. 



Described from many alcoholic specimens. Belen, N. Mex. August 7. 



A LIST OF SPECIES OF DIPTERA FROM SAN DOMINGO. 



BY S. W. WILLISTON, LAWRENCF., KANSAS. 



Some years ago I received a small collection of diptera from San 

 Domingo, made by Mr. F. Frazar, a list of the species of which it is 

 composed I herewith give. Hitherto scarcely two score species have 

 been recorded from the island. The habitats followed by an exclama- 

 tion point are given from specimens which I have examined : — 



1. Odontomyia, sp. 



2. Cyphomyia, sp. 



3. Lepidoselaga crassipes, Fabr. South America ! Mexico ! Cuba. 



4. Chrysops costatus, Fabr. South America ! Cuba. 



5. Chrysops Frazari, Will. 



6. Tabanus parvulus, Will. 



7. Tabanus fenestra, Will. 



S. Plesiomma lineata, Fabr. St. Thomas. 



9. Laphria ruftcauda, Williston. Cuba ! 



10. Andrenosoma clialybea, Will. Cuba ! 



it. Atonia Mikii, Will. 



12. Proctacanthus rufirentris, Maco. Honduras. Porto Rico. 



13. Erax, sp. 



14. Ommatius vitreus, Bigot. 



15. Psilopus chrysoprasiuc, Walker. Cuba! Brazil! Porto Rico. 



16. Plagioneurus univitatius, Loew. South America ! Cuba. 



17. Microdon pulcher, Will. 



18. Mesogramma aurulentum, Will. 



19. Syrphus simplex, Loew. Cuba. 



20. Ocyptamus dimidiata, Fabr. Brazil ! Mexico ! 



21. Ocyptamus /atiuscu/us, Loew. Cuba. 



22. Ocyptamus fasciatus, Roeder. Porto Rico. 



23. Eristalis atrimauus, Loew. Cuba. 



24. Eristalis albifrons, Wied. Brazil! Mexico! United States! Port Rico, 



25. Eristalis hortorum, Fabr. 



