342 DIPTERA OF NORTH AMERICA. [PART II. 



11. Hypophyllus discipes Ahr. %. 



a. head 9 > b. antenna 9 » c « antenna % , and d. wing % of the 

 same. 



12. fSaltericerus eucekus Lw. % . 

 1. head £ , b. antenna J , c. antenna £ , and d. wing £ of the 



same. 



13. Diostracus peasinus Lw. % . 



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



,, 14. Aiiepsilis flaviventris Meig. % . 



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



15. Argyra albicans Lw. % . 



a. head £ , 6, head 9> c « antenna %,dT antenna 9» and e. wing 

 £ of the same. 1 



16. Syntormon metathesis Lw. % . 



a. head £ , 6. head 9 > c. antenna £ from the outside, d. antenna 

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

 same. 2 



17. Synartliriis palmaeis Lw. % . 



a. head 9 ? and b. head ^ of £. pallipes Fabr. — c. antenna £ , and 

 c?. wing % of aS. pahnaris. 



IS. Systeraus Scholtzii Zw. $. 



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

 wing % of aS. adpropinquans Lw. 



PLATE Y. 



19. Rliaptlium longicoene Meig. % . 



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

 9 of the same.—/, antenna 9 °f R- lugubre. — #. wing 9 of 

 R. longicorne. 



20. Xipliandrium qctadrifilatum Lw. % . 



a. head^,, and b. head 9 °f X. caliginosnm Meig. — c. antenna % 

 of X. quadrifilatum. — d. antenna % , e. antenna 9 , and /, -wing 

 9 of X. caliginosnm. 



21. Porpliyrops melampus Lie. % . 



a. head % , b. head 9 5 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. 



