324 DIPTERA OF NORTH AMERICA. [PART II. 



14 

 24 



, o f Antennae black, at the utmost the first joint almost yellowish-red. 



*■ Antennae, altogether or at least their larger portion, yellowish-red. 



..( Fore coxae dark at the base, beyond the middle. 11 longimanus Lw. 



I Fore coxae pale. 15 



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



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



1 „ f Fore tarsi only ferruginous-brownish. 12 brevimanus Lw. 



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



17 f Hind tarsi entirely black. 18 



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



1 s f Hind femora of the male not ciliated. 14 nudus Liu. 



\ 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 paleestricus Lw. 



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



without a white reflection. 20 



Hind femora of the male very densely ciliated. 16 splendidus Liu. 

 Hind 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 Liu. 

 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 



2 o ( Hind femora of the male ciliated. 18 eudactylus Lw. 



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



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

 I Fore tarsi of the male plain. 25 



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

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



2^ ( Fourth longitudinal vein broken. 27 



( Fourth longitudinal vein not broken. 31 



27 ( Antennae black. 23 ramifer Lw. 



( Antennae yellowish red. 28 



' Fourth longitudinal vein broken twice at right angles. 



24 bifractus Lw. 

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

 rounded. 29 



29 ( Tarsi of the male plain. 25 vittatus Lw. 



\ Fore tarsi of the male enlarged at the tip. 30 



19 



20 



2U 



28-1 



