324 DIPTERA OF NORTH AMERICA. [PART II. 



,,| Antennae black, at the utmost the first joint almost yellowish-red. 14 



1 Antennae, altogether or at least their larger portion^ yellowish-red. 24 



, . f Fore coxae dark at the base, beyond the middle. 11 longimarms Lw. 



I Fore coxae pale. 15 



,.| Tip of the hind tibiae distinctly black. 16 



I Tip of the hind tibiae not, or very slightly infuscated. 17 



, fi f Fore tarsi only ferruginous-brownish. 12 brevimaims Lw. 



I Fore tarsi blackened from the tip of the first joint. 13 socius Lw. 



,- f Hind tarsi entirely black. 18 



I Basis of the hind tarsi to a considerable extent pale. 22 



Hind femora of the male not ciliated. 14 nudus Lw. 



Hind femora of the male ciliated. 19 



The enlarged last joint of the fore tarsi of the male on the outside 



with a white reflection. 45 palaestricus Lw. 



The enlarged last joint of the fore tarsi of the male on the outside 



without a white reflection. 20 



2Q 5 Hind femora of the male very densely ciliated. 16 splendidus Lw. 



18 



19 



*Hi 



21 ^ 



ind femora of the male sparsely ciliated. 21 



Hind tibiae not infuscated at the tip ; the fourth joint of the fore tarsi 

 of the male somewhat broader than the preceding. 



44 splendidulus Lw. 

 Hind tibiae somewhat infuscated at the tip ; the 4th joint of the fore 

 tarsi of the male not broader than the preceding. 



15 subciliatus Lw. 



r Only the last joint of the fore tarsi of the male enlarged. 



22-J 17 batillifer Lw. 



I. The two last joints of the fore tarsi of the male enlarged. 23 



no ( Hind femora of the male ciliated. 18 eudactylus Lw. 



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



24 ( Last joint of the fore tarsi of the male enlarged. 20 tener Lw. 

 X Fore tarsi of the male plain. 25 



25 ( Wings hyaline with a grayish tinge. 21 variabilis Lw. 

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



2g ( Fourth longitudinal vein broken. 27 



( Fourth longitudinal vein not broken. 31 



w. 



28 



2^ ( Antennae black. 23 ramifer L 



X Antennae yellowish red. 



f Fourth longitudinal vein broken twice at right angles. 

 2ft J 24 bifractus Liu. 



| The lower angle of the fourth longitudinal vein sharp, the upper one 

 rounded. 29 



29 ( Tarsi of the male plain. 25 vittatus L 



X Fore tarsi of the male enlarged at the tin. 



>c. 



Fore tarsi of the male enlarged at the tip. 30 



