March, igii.] FeLT : GENERIC SYNOPSIS OF IxONID.^. 37 



Genus HAPLUSIA Karsch 1877, type H. phuuipcs Karsch. 

 Tarsi quinquearticulate, the metatarsus shorter than the second 

 segment; wing membrane finely haired, the fifth vein forked, the 

 third extending to the apex of the wing; palpi quadriarticulate. 

 South America. 



Genus TETRADIPLOSIS Kieff. & Jorg. 1910, type T. sexdcntaius 

 Kieff. & Jorg. 

 Apparently allied to the preceding and easily separated therefrom 

 by the plainly bidentate claws. South America. 



Genus JOHNSONOMYIA Felt 1908, type /. rubra Felt. 

 Separated from the preceding form by the simple fifth vein, the 

 sixth wanting. The palpi are quadriarticulate. North America. 



Genus CHASTOMERA Skuse 1888, type C. bella Skuse. 

 This genus appears to be closely related to J ohnsonomyia Felt, 

 though easily separated therefrom by the pyriform flagellate antennal 

 segments. It is remarkable because of the third vein being widely 

 distant from subcosta, which latter is connected therewith at its 

 distal fourth, the fifth vein simple. Australia. 



Genus NECROPHLEBIA Skuse 1888, type N. volitans Skuse. 

 Appears to be closely related to the preceding, though the third 

 vein is much nearer subcosta, the latter being united therewith near 

 its basal third; antennal segments 14, the flagellate cylindric, with a 

 stem one half the length of the basal enlargement. Australia. 



Genus MEINERTOMYIA, new name, type Pero fasciata Mein. 

 A small form distinguished from the preceding by the triarticulate 

 palpi and the third vein not extending to the apex of the acuminate 

 wings. Synonym: Pero Mein. 1870, preoccupied by Pero H. Schf. 

 Europe. 



Genus LEPTOSYNA Kieff. 1894, type L. acutipennis Kieff. 

 Separated from the two preceding genera by the uniarticulate 

 palpi. Wings acute apically. Europe, North America. 



Genus FRIRENIA Kieff. 1894, type F. tenella Kieff. 

 Three long simple veins, the third disappearing before the tip of 

 the wing; wing membrane finely haired; palpi biarticulate. Europe. 



