342 DIPTERA OF NORTH AMERICA. [PART II. 



11. HypopliylllfiS DISCIPES Ahr. $ . 



a. head 9 > * antenna 9 > c - antenna $ , and d. wing of the 

 same. 



12. Haltericerus EUCERPS Lw. % . 



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

 same. 



13. Diostracus PRASINUS Lw. $ . 



a. antenna $ , 6. head $ , c. head 9 and ^- wing of the same. 



14. Anepsilis FLAVIVENTEIS 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. 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 





 1?. Synartliriis PALMARIS Lw. % . 



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

 d. wing of *S. palmaris. 



18. Systenus SCHOLTZII Zw. . 



a. head of S. bipartitus Lw. 6. antenna $ of . Scholtzii. d. 

 wing of S. adpropinquans Lw. 



PLATE Y. 



19. Rliaphium LOSGICORNE Meig. . 



a. head 9 > & head > c. head 9 > ^ antenna , and e. antenna 

 9 of the same. -f. antenna 9 f R- lugubre. g. wing 9 f 

 R. longicorne. 



20. Xipbandrium QUADRIFILATUM Lw. $ . 



a. head'J,, and 6. head 9 of X. caliginosum Meig. c. antenna 

 of JT. quadrijilatum. d. antenna , e. antenna 9 , and f. wing 

 9 of JT. caliginosum. 



21. Porphyrops MELAMPCS ZH\ $ . 



a. head , b. head 9 > c - antenna ^ , c?. antenna 9 > an< i 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. 



