E. T. CRESSOK, JR. 
327 
(loveloped, uproii-like, projecting and occupying tlu‘ narrow, 
eniarginated epistonia. Proboscis retractih'. Antcnnai^ sliorl; 
second joint with short ai)ical spine. Thorax quadi-ate, witli 
fore coxae not attaining base of middle ones. Mesonotum 
rather convex; setulae numerous and irregular, or sparse; and 
serially arranged; one post-dor.so-central mair ba.se' of scutellum, 
one post-alar, two notopleurals, one or more mai'ginal nu'so- 
pleurals, one sternopleural. Scutellum broad, with four bristles. 
.Vbdomen ovatex Legs rather slender, but forc'temoi'a thickemed, 
generally with a post-Hexor series of short sjeines, .seve'ral of 
which are sometimes stronger than the others. Wings ('longate'; 
costa broad at humeral cro.ss-vein; no cleft at first vein; auxiliary 
vein ending in first near mitldle of latter; second vein long and 
sti-aight; third and fourth veins gemu-ally ]iarall('l. All bristles 
proportionately short. 
ddiere are six genera known to me, four of which, (unbracc'd 
in the scope of this i)aper, may lx* sejxii'ated as follows: 
Table of (lenero 
t)roa(l, auriculatc (Gynniopiiii). 
Face witli a median .shining tubercle; frontal l)ristles v(>ry weak Gymnopa 
Face medianly wrinkled without tubercle; fr()nto-orl)ital l)ristlcs well di'- 
veloped Cerometopon 
Alula narrow, linear . Athyroglossa, Ochtheroidea 
GYMNOPA Fallen 
LS20 Gijmnopa Fallen, Dipt. Suec., Oscin., 10. 
bSot). (Habrinm Rondani, Prod. Ital., i, 132. 
This genus I have considered typical of tlu; pri'sent subianiily. 
Its species are similar to those of Doscocen no suiH'rticially. 
Both genera are proliably old, branching early in their ])hyl<)g(Miy. 
The present genus has lieen itlaced in various families by jna;- 
vious authors, showing that they suspeett'd its lack of allinity 
with recognized Ephydrid groups. By most authors, howevc'r, it 
was considered a CUiloroitid rather than an J’.phydrid. It is 
probably neither, but is included with its allies in tin* jin'scmt 
]ttiper on account of its ajtpariMit relationship with tin' otln'i 
members of the Eiihydridae. 
TR.\NS. AM. RNT. SOC., XIA'II. 
