324 DIPTERA OF NORTH AMERICA. [PART II. 



, o / Antennre black, at the utmost the first joint almost yellowish-red. 14 

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



. f Fore coxfe dark at the base, beyond the middle. 11 longimanus Ln\ 

 14 < -.f 



(. Fore coxae pale. 



f Tip of the hind tibiae distinctly black. 



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



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



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



.. f Hind tarsi entirely black. 



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



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



I Hind femora of the male ciliated. 



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

 with a white reflection. 45 palsestricus Lw. 



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

 without a white reflection. 20 



9n C'Hind femora of the male very densely ciliated. 16 splendidus Lw. 

 (. 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 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. 



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

 22 -^ 17 batillifer Lw. 



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



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



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



9 , f Last joint of the fore tarsi of the male enlarged. 20 tener Lw. 



I Fore tarsi of the male plain. 25 



nr- f Wings hyaline with a grayish tinge. 21 variabilis Lw. 



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



Fourth longitudinal vein broken. 27 



Fourth longitudinal vein not broken. 31 



9 _ ( Antennas black. 23 ramifer Lw. 



\ Antennae yellowish red. 28 



f Fourth longitudinal vein broken twice at right angles. 



24 bifractus Lw. 



28 ! 



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



rounded. 29 



9 q | Tarsi of the male plain. 25 vittatus Lw. 



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



21-! 



f 

 1 



