282 LIST OF DIPTERA. 



B. Corpus canescens. - quadrivittatus, Say. 



C. Corpus fuscum. - - - - - obsoletus, Wied. 



D. Corpus flavum. 



A. Thorax fusco trivittatus. - flavidus, Wied. 



B. Thorax fusco bivittatus. - - - vittatus, Wied. 



24. ClIRYSOPS PLANGENS. 



Niger, cano hirtus ; alee costa, fascia apiceque dilutissime fuscce. 

 Chrysops plangeus, Wied. 



25. Chrysops fuliginosus. 



Niger, fuliginoso hirtus ; aloe fuscce, fascia abbreviata lunulaque 

 apicali limpidis. 



Chrysops fuliginosus, Wied. 



26. Chrysops trinotatus. 



Fcem. Niger ; antennce basi pedesque fulva ; abdomen maculis 

 tribus fiavis ; alcefuscce, margine postico fasciaque transversa 

 arcuata hyalinis. 



Chrysops trinotata, Macq. Dipt. Exot. i. 1, 161, 9. 

 Philadelphia. 



27. Chrysops lugens. 



Niger ; thorax fiavo bivittatus ; ala, lunula et macula parva lim- 

 pidis. 



Chrysops lugens, Wied. Dipt. Exot. i. 109, 12; Auss. Zweifi. i. 

 212, 26. 



United States. 



28. Chrysops niger. 



Foem. Niger ; antennce nonnunquam basi fulvce ; alee hyalina, 

 costa fasciaque trigona fuscis. 



Chrysops nigra, Macq. Dipt. Exot. i. 1, 161, 10. 

 North America. 



