28 DirTERA OF NORTH AMERICA. [PART II. 



b. Cilia of the tegulae black. 



1. Fourth longitudinal vein broken. 



a. Antennae black. 



23. ramifer Lw. 



b. Antennae yellowish-red. 



24. bifractus Lw. 26. cuprinus Lw. 



25. vittatus Lw. 27. longipennis Lw. 



2. Fourth longitudinal vein not broken. 



a. Antennae red, at the utmost the third joint at the tip 



almost entirely red. 



a. Humeral callosity of the same color with the 

 thorax. 



28. hastatus, n. sp. 31. sexarticulatus, n. sp. 



29. plumipes Scop. 32. ryficornis Lw. 



30. fulvipes Lw. 



8. Humeral callosity yellowish. 

 33. scapularis Lw. 34. funditor L,w. 



b. Antennae black, at the utmost themrst joint partly red. 



35. chrysostomus Lw. 39. discifer Stann. 



36. praeustus Liu. 40. lobatus Lw. 



37. comatus Lw. 41. setosus L^w. 



38. scoparius Lw. 42. incisuralis Lw. 





