E. T. CKES.S(JN, JU. 
STUDIES IN AMERICAN EPHYDRIDAE 
(DIPTERA) 
BY E. T. CBESSOxX, JK. 
III. A HE\TSI()N OF THE SPEC'IES OF OVAINolEV 
AND ALLIED CENERA ('OXSTITUTIXO Till-: 
S U B F A M I L Y O Y :V I X ( ) r I X AIT 
'TIh' .s|)('ci(‘,s ill tliis paper Ix-loii"; (o a subiaiiiily wliicli 
I i)ro})o.se for the reeeption of Pldcopsidelid, (hpnnopa, Mhip-o- 
(jlusHd, Ochthcruklcd, and Cerodietopon. In iny elassifieal ion of 
the Eiihydridae, this f>roup of <>;enera eonu's first in tlu' liiu-ar 
a.rranfi;enient . It*is (pu'stionahle, iiowi'vi'r, whether these ycaiera 
are iiK'nilxas of (Ik* I-iphydrida.e. ddiey stion^iy sujijii-st in 
many ri-speets relal ionshi]) to ineinln-rs of tiu' ( tseinidan oi' 
the Agroinyzidae, and this uneonformity is largely n-spon- 
silile for placinji; the gi'oup far from Ephijdra and its allies. 
In eriticism of the Haliday-Lot'w elassifieation followi-d liy 
Beeker et ah, I have to say that Athip'oylo.sxd and Oi'ldheroidcd 
are eertainly related to (Ti/mnojxi, not with Hijdrind or Ocldhcrd. 
Superficially the sjiecies of Ochtheroiden I'e.semhh' those of 
Ilydrina, lint there is no logical similarity to those' of Ochthera, 
except in the slightly thickened, spino.se foiv femora. This 
thickening is also pre.sent in some species of Discdccritid, which 
genus belongs to a distinct group. The gi'iius Iddcopxididld is 
v(>ry closely related to (rijdijiopd , and (xmtains, ti’om present 
knowledge, a single oriental specie's, cydnoccplddd Ke-i'te'sz. 
In this subfamily I would also ])lac(' the' ge'iius l/ccdiiicdc. 
Its iiosition, however, is diffie'ult to de'te'rmine'. But one', a 
l-iuroiiean, species is known. 
As stated in the introeluctory re'inarks to the'se' studie's gi\'en 
in the first pajier, 1 inteiul tei jmblish a i‘e'vise;d classifie-at ion ot 
the family at the' e'lid of the' se'iT's. ddu'se' studie's ol an aji- 
parently large, little known family ol Dipte-ra, bi'ing ne'ce'ssarily 
preliminary in nature', I will abridge' the' diagnose's to what se-em 
to be essential characte'i'istie-s, le'aving the more' exhaust i\e de-- 
scriptions to the me)ne)gra])h('r. 
TRANS. AM. ENT. SOC., XLVII. 
