342 DIPTERA OF NORTII AMERICA. [PART II. 



11. Hypopliyllus discipes Ahr. % . 



a. head 9 > °- antenna 9 , c. antenna % , and d. wing £ of the 

 same. 



12. Haltericerus eucerus Lw. % . 



a. head % , b. antenna 9 > c - antenna £ , and d. wing £ of the 

 same. 



13. Diostracus prasinus Lw. % . 



a. antenna % , b. head % , c. head 9 > an( i d. wing % of the same. 



14. Anepsius flaviventris Meig. % . 



a. head % , b. antenna % , and c. wing £ of the same. 



15. Argyra albicans Lw. % . 



a. head % , b. head 9 > c - antenna £ > d. antenna 9 > and e. wing 

 £ of the same. 1 



16. Syntormon metathesis Lw. % . 



a. head % , b. head 9 > c - antenna £ from the outside, d. antenna 

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

 same. 2 



IT. Synartlii-us palmaris Lw. % . 



a. head 9 > an d b. head % of & pallipes Fabr. — c. antenna % , and 

 J. wing £ of 5. palmaris. 



IS. Systenus Scholtzii Zw. $ . 



o. head % of *S. bipartitus Lw. — 6. antenna £ of S. Scholtzii. — d. 

 wing £ of *S. adpropinquans Lw. 



PLATE V. 



19. Rliaphilim longicorne Meig. % . 



a. head 9 » &• head £ , c. head 9 > d. antenna % , and e. antenna 

 9 of the same.—/, antenna 9 of R- lugubre. — g. wing 9 of 

 R. longicorne. 



20. Xiphandrium quadrifilatdm Liv. % . 



a. head-J,, and 6. head 9 of X. caliginosum Meig. — c. antenna £ 

 of X. quadrifilatum. — d. antenna % , e. antenna 9 > aQ d f. wing 

 9 of X. caliginosum. 



21. Porpliyrops melampds Lv\ % . 



a. head % , 6. head 9 > c - antenna £ , d. antenna 9 » an d 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. 



