28 DIPTERA OP NORTH AMERICA. [PART II. 



B. Cilia of the tegulse 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. ruficornis Lw. 



30. fulvipes Lw. 



B. Humeral callosity yellowish. 

 33. scapularis Lw. 34. funditor Lw. 



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



35. chrysostomus Lw. 39. discifer Stann.' 



36. preeustus Lw. 40. lobatus Lw. 



37. comatus Lw. 41. setosus Lw. 



38. scoparius Lw. 42. inclsuralis Lw. 



