LIST OF DIPTERA. 283 



29. Chrysops fascipennis. 



Niger; antenna fulvce ; thorax lateribus fulvis ; abdomen fulvurn, 

 nigro bivittaium ; pedes fulvi ; alee hyalines, costa fascia 

 apiceque fuscis. 



Chrysops fascipennis, Macq. Hist. Nat. Dipt. i. 21, 6, 7. 

 Philadelphia. 



30. Chrysops quadrivittatus. 



Canescens ; thorax nigro quadrivittatus ; abdomen e maculis fuscis 

 quadrivittatum ; pedes flavo-fusci ; alee limpidee, fusco punc- 

 tatee. 



Chrysops quadrivittatus, Say, Journ. Acad. Philad. iii. 1822, 33, 1. 

 Wied. Auss. Zweifl. i. 200, 9. 



Pennsylvania. 



31. Chrysops obsoletus. 



Fuscus ; antenna flavee, apice nigro-fuscce ; pedes flavi, tibiis an- 

 ticis et posticis fuscis; alee hyalinee costa fascia apiceque 

 fuscis; mas thorax et abdomen absque vittis ; foem. thorax 

 flavo quadrivittatus ; abdomen vitta abbreviata, utrinque 

 macula longitudinali Jlavis. 



Chrysops obsoletus, Wied. Dipt. Exot. i. 108, 10 ; Auss. Zweifl. 

 i. 211,25. 



North America. 



32. Chrysops flavidus. 



Flavidus ; antennee apice nigrce ; thorax vittis tribus, abdomen 

 maculis duabus antice conjunctis, fuscis ; ala limpidee, costa 

 ante apicali fasciaque lata fuscis. 



Chrysops flavidus, Wied. Dipt. Exot. i. 105, 5 ; Auss. Zweifl. i. 

 199, 7. 



United States. 



