NO. mw. sYXorsrs or xeotropical UM-^OBiyjE—ALEXASDim. 503 



trot hunters jiule; abdomen and remainder of the feet, greyish-brown; 

 wings little infuscatcd; stigma dusky. 



^Jale. — Length, body, 2^ Imes; wing expanse, 01 lines. 



IlaUtat.—Y&idWvA, Chile. 



Genvis GONOMYIA Meigen. 



GoJiomyta Meigen, Syst. 15oschr., vul. I, 1818, p. 14G. — Ostem Sackex, SIikUos, 



pt. 2, 1SS7, p. 200. 

 Taphrosin Rondani, Prodr, vol. 1, 185G, p. 1820. 

 Gcniomyia Osten Sacken, Monographs, vol. 4, 1869, p. 177. 



Gonomyise appear to be numerous in the Neotropical regions and 

 many sj)eeies are herein recorded. Some of the aberrant species 

 that I have referred to the subgenus Liiponeura Skuse, have i)een 

 placed in various genera of the Antochini, simply because of the lack 

 of one branch of tjie radial sector. Thus AUirha jnieJln Williston, 

 A. pleuralis Williston, ElUptera, sji. (Williston); EUiptera alexanderi 

 Johnson, and the two Australian species of Leiponeura are, apparently, 

 all Gonomyise. I have had for examination all of the American 

 Gonomjaae excepting G. galactoptera Bcrgroth, of Alaska. (Aklrich 

 gives also 6. caudata Lundberg, but Kertesz calls this an Empeda.) 



The i\jnerican species referable to the subgenus C'onomym Meigen, 

 (tji^e ienelld !Meigen) are ilanda Osten Sacken; cognatella Osten 

 Sacken; suhcinerea Osten Sacken; sxilpTiurella Osten Sacken; virgata 

 Doane; galactoptera Bergroth; delicata, new species; and unicolor, 

 new species. 



Those species referable to Leiponeura Skuse (type gracilis Skuse) 

 are manca Osten Sacken; pleuralis Williston; puella Williston; 

 alexanderi Joluison; and puer, new species. 



In the genus Gonomyia the {)romhient fovese on tlie sides of the 

 mesotlioracic prsescutum that I have called the "pseudosuture" are 

 11'irmal in position, but the tuberculate pits are far ccphalad and 

 .11, locateil on tiie anterior margin of the sclcrite. 



' KEY TO THE .SUBGENERA OF GONOMYIA. 



1 . Radial sector with 3 branches reaching the \ring margin Gonomyia Meigen. 



Radial sector with but 2 branche.s reaching the wing maigin. . .Leiponeura Skuse. 



KEY TO THE SPECIES OF LEIPONEURA SKUSE. 



1. Femora with a distinct brown band before the tip 2. 



Femora unicolorous, not banded at the tip 3. 



2. Hind legs with the tibia china- white; tibiae tipped with dark brown, 



alexanderi idhnmn' (Eastern U. S.). 

 Lcj^3 uniform, browni.sh-yellow manca Osten Sacken " (Eastern U. S.). 



