18 



DIPTERA OF NORTH AMERICA. [PART II. 



r Hind femora of the male with, sparse and rather short cilia. 



15 subciliatus, n. sp. 

 Hind femora of the male with very long and dense cilia. 



16 splendidus Lw. 



{Only the last joint of the fore tarsi of the male is enlarged. 

 17 batillifer Lw. 

 The two last joints of the fore tarsi of the male are enlarged. 20 



o/j f Hind femora of the male ciliated. 18 eudactylus Lw. 



I Hind femora of the male not ciliated. 19 tonsus Lw. 



a, J Last joint of the fore tarsi of the male enlarged. 20 tener Lw. 



I Fore tarsi of the male plain. 22 



22 / Wings hyaline with a grayish tinge. 21 variabilis Lw. 



I Wings hyaline with a yellowish tinge. 22 luteipennis Lw. 



o, f Fourth longitudinal vein broken. 24 



I Fourth longitudinal vein not broken. 28 



o^ f Antennae black. 23 ramifer Lw. 



I Antennas yellowish-red. 25 



{Fourth longitudinal vein broken twice at right angles. 24 bifractusZw. 

 The inferior angle of the fourth longitudinal vein sharp, the superior 

 one rounded. 26 



2fi f Tarsi of the male plain. 25 vittatus Lw. 



\ Tarsi of the male enlarged at the tip. 27 



ow f Hind femora of the male ciliated. 26 cuprinus Wied. 



I Hind femora of the male not ciliated. 27 longipennis Lw. 



{Antennas red, at the utmost the third joint somewhat or altogether 

 blackened at the tip. 29 



Antennas black, at the utmost the first joint partly red. 36 



{Humeral callosity of the same color with the upper side of the thorax. 

 30 

 Humeral callosity yellowish. 35 



o f Arista much enlarged towards the tip in the male. 28 hastatus, n. sp. 

 I Arista of the male not enlarged. 31 



o-j J Last joint of the fore tarsi not enlarged in the male. 32 



I Last joint of the fore tarsi enlarged in the male. 33 



oof First joint of the male middle tarsi feathered. 29 plumipes Scop, 

 i First joint of the male middle tarsi not feathered. 30 fulvipes Lw. 



{Last joint of the male fore tarsi with a lamelliform appendage. 

 31 sexarticulatus, n. sp. 

 Last joint of the male fore tarsi without lamelliform appendage. 34 

 04 f Last joint of the male fore tarsi small. 32 ruficornis Lw. 



\ Last joint of the male fore tarsi large. (40 lobatus Lw.) 



or ( Fore tarsi of the male plain. 33 scapularis Lw. 



\ Fore tarsi of the male enlarged at the tip. 34 funditor Lw. 



og f Face dark golden-yellow. 35 chrysostomus Lw. 



Face not golden -yellow. 37 



