342 DIPTERA OF NORTH AMERICA. [PART II. 



11. Hypoplayllus DISCIPES Ahr. . 



a. head 9 , b. antenna 9 , c. antenna , and d. wing of the 

 same. 



12. Haltericerus EUCERUS Lw. . 



a. head , 6. antenna 9 , c. antenna > , and d. wing of the 

 same. 



13. Diostracus PKASINUS Lw. $ . 



a. antenna , 6. head , c. head 9 ) and d. wing of the same. 



14. Anepsius FLAVIVENTKIS Meig. . 



a. head $ , 6. antenna $ , and c. wing $ of the same. 



15. Argyra ALBICANS Lw. $ . 



a. head $ , 6. head 9 > c - antenna , d. antenna 9 , and e. wing 

 of the same. 1 



16. Syntoriuou METATHESIS Lw. . 



a. head % , ft. head 9 > c - antenna from the outside, e?. antenna 

 9 from the inside, e. antenna $ inside, and /. wing $ of the 

 same. 2 



17. Synartlirus PAOIARIS Lz. $ . 



a. head 9 > and b. head $ of . pallipes Fabr. c. antenna $ , and 

 f/. wing of 5. palmar is. 



IS. SysteilMS SCHOLTZII i?<;. ^ . 



a. head of 5. bipartitus Lw. &. antenna ^ of 5. Scholtzii. d. 

 wing $ of <S. adpropinquans Lw. 



PLATE V. 



19. Rliapliilim LONGICORNE Meig. ^ . 



a. head 9 > 6. head , c. head 9 ) d- antenna 'J, , and e. antenna 

 9 of the same./, antenna 9 of & lugubre. g. wing 9 of 

 R. longicorne. 



20. Xipiianclriiim QUADRIFILATUM Lw. -J, . 



a. head'J,, and b. head 9 of X. caliginosum Meig. c. antenna ^ 

 of X. quadrifilatum, d. antenna , e. antenna 9 , and f, wing 

 9 of X. caliginosum. 



21. Porpliyrops MELAMPUS Lw. ^. 



a. head ^ , 6. head 9 > c - antenna ^ , d. antenna 9 > and e. wing 

 $ of the same. 



1 The antennal arista of the was made by the engraver a little too 

 long, that of the 9 a little too short. 



2 Owing to a mistake, which was discovered too late, the posterior trans- 

 verse vein is wanting in fig. /in some of the impressions of this plate. 



