I 



26 DIPTERA OF NORTH AMERICA. [PART II. 



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



15 subciliatus, n. sp. 

 J 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. 



19 } 17 batillifer Lw. 



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



9( . ( Hind femora of the male ciliated. 18 eudactylus Lw. 



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



21 / Last joint of the fore tarsi of the male enlarged. 2U tener Lw. 

 I Fore tarsi of the male plain. 22 



09 I Wings hyaline with a grayish tinge. 21 variabilis Lw. 



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



oo f Fourth longitudinal vein broken. 24 



I Fourth longitudinal vein not broken. 28 



04 f Antennae black. 23 ramifer Lw. 



I Antennae yellowish-red. 25 



(Fourth longitudinal vein broken twice at right angles. 24 bifr actus Lw. 

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

 one rounded. 26 



„n f Tarsi of the male plain. 25 vittatus Lie. 



I Tarsi of the male enlarged at the tip. 27 



2« f Hind femora of the male ciliated. 26 cuprinus Wied. 



<- Hind femora of the male not ciliated. 27 longipennis Lw. 



(Antennae red, at the utmost the third joint somewhat or altogether 

 blackened at the tip. 29 



Antennae 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 



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

 I Arista of the male not enlarged. 31 



o-, ( Last joint of the fore tarsi not enlarged in the male. 32 



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



22 / First joint of the male middle tarsi feathered. 29 plumipes Scop. 

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

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



31 sexarticulatus, n. sp. 



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

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



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



g^ ( Fore tarsi of the male plain. 33 scapularis Lw. 



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



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



*- Face not golden-yellow. 37 



33] 



