48 NOPvTII AMERICAN DIPTEEA. 



"l-c/— / ''■ Yiivv j)r()(luc'C(l coniciilly dowiiwivrds; antC'iiiKL' elongate. 

 tAxjCi^yX^y. T^tV Myxosargus Brauer. 



. " Face not jtroduced eoiiieally : third anteiinal joint oval with a terminal 

 ■-i.^^,iX^-~v. arista Nothomyia Loew. 



CLITELLARIN.'I<:. 



1. Sciitelluni without sj)ines. ........ 7 



Seutelluiii with spines. ......... 2 



2. Antennai short, witli a suhterniinal arista. . . Oxvckua Meigen. 

 Antennae more or less elongate. ....... 3 



o. Antennae situated near tlie oral margin ; third joint composed of six 

 annuli (Central and South America). . P^uhynkuka Schiner. 

 Antennai situated near or a little below tlie middle of the head in pro- 

 file 4 



4. Antennte much elongated ; style not ditfereiitiated ; eyes bare ; smaller 



species. ...... Eui-akhyphis Gersta^cker. 



Antennie moderately elongated. ....... 5 



5. Style of antennje not differentiated. . . Scoliopelta Williston. 

 Style of antemue distinctly differentiated. ..... (i 



0. p]yes pilose; antennitt with a slender style. Clitellaima Meigen. 



Eyes bare; style not slender (Central America). 



Aociii.ETis Osten Sacken. 



7. Face conically produced downward. . . Nemotelus Geoffro^-. 

 Face not conically ]>roduced. ....... H 



8. Third antennai joint with a long slender arista, longer than the antenna' ; 



eyes bare (Central anil South America and the West Indies). 



Chkysochloka Macquart. 

 Eyes j)ilose; antenme witli a sliort, thickened, divaricate, hairy style, ter- 

 minating in a sliort slender bristle; second joint of antenna? not 

 with a finger-like jirojection over the third joint (West Indies). 



1'elagomvi.v Willi 

 PACHYGA.STRIN.1;. 



^ y 1. Antt-nna- situated near the oral margin 2 



Antenme situated near the middle of the head in profile. . . •"! 



■f'*'"*-''^^*^ ^ 2. Third joint of the antenna? forked, complicated in structure {C/kiidih 



L.>Jhi^^^*<^ • Jireoc. West Indies). .... Neochauna, nom. nov. 



, __ Tiiird joint of the antenna^ elongate, with a distinct style, not forki'd 



(Central and South America). . . Acan'thina Wiedemann. 



3. Scutellum ending in a stout spine (Central and South America). 



t'vNiPi.MOiiiMiA Brauer. 



Scutellum without spine, sim])le. . . 1'aciiv<;asti;k .Meigen. 



' ^■^. 



^tfc^ 



