334 
STUDIES IN AMERICAN EPHYDRIDAE (dIPTERa) 
sliiiiing l)lack, with Ijasal joints ol fore tarsi yellow; no trac^e of loinoral 
spines. Lenfi;th. — 1.4 to 2.4 nun. 
Type. — 9; Orsova, Hungary, [Becker CVillection]. 
Material Examined . — 13 specimens. 
New Hamp.siuke: Cornish, July 13 (C. W. Johnson), [B. 8. N. 14.]. 
Vermont: Lyden, June 13, [^^'ash.]. 
New York: Beaverkill, Sullivan County, August fi, (Cresson). 
New Jersey: Trenton, July 4, (H. S. Harbeck). 
M.xrylanu: Bhunmer’s Island, Aj)!'!! 12, (W. L. IVb'Atee), [Biol. Surv.]. 
Illinois: Aljiiomiuin, June 1, (W. A. Nason); I rhana, Novemlau' 21, (on 
window), [all Illinois]. 
Idaho: Moscow, (J. M. Aldrich], [Aldrich]. Potlatch; Priest Lake, 
Aufiust 1, (A. L. Alelander); [all Wash.]. 
Washington: Cllenwood, Klickitat River, June 27; Prosser, May 4; (all 
A. L. Melaiider). [all Wash.]. 
C.\lifornia: Lagunitas Canyon, Marin Co., March 20, (Cresson). Palo 
Alto, September 4-5, (J. C. Bradley). [Cornell]. 
OCHTHEROIDEA Williston 
ISOt). Oehlheroidea Williston, Trans. Ent. Soc., London, bSOG, 401. 
It is very douhtful if this genus is distinct from Aihyroglosm. 
It was ])roposed for the receittion of a species which does not 
sliow as much differentiation from the type of AtliyroyJos.sa as 
do some of tlie others, which if not included here will have to 
go umhu' a new' genus. This latter treatment is not advisable 
:tt ]H'esent. Wei-e there not an apiiarent intergradation between 
the serial and the non-serial ai'rangement of the mesonotal 
setulae, one might consider this characteristic of some generic 
im])ortance. So it may ])rove to be, especially where in one tyjie 
the setulae are arranged in well sejiarated series, in contradis- 
tinction to the other in which the setulae are more numerous, 
and at most indistinctly arranged in very close series. However, 
there seems to be no other characteristics correlated with these 
two types, and such treatment would throw our ordiniita out 
of Aihyroylonsd, jirobably make Oehlheroidea a synynym ot 
A thyroylo.sna, and also make it necessaiy to erect a new genus 
for the recejition of the tii'st mentioned type of sjK'cies. 
How('ve)-, aft('i- much study of th(‘ material Ix'fori' me, con- 
taining ri'lative good siu-ies fi-om many localities, including tlu' 
JOast- Indii'S and Australia, I havi' concludi'd to ti'i'at Oehlheroidea 
as giMHM'ica.Ily distinct Irom Athyroylonna upon tlu' lollowing 
characti'is. 
