54 
STUDIES IN AMERICAN EPHYDRIDAE (dIPTERA) 
Note. — In working over this species preparatory to submitting 
this paper for publication, it was discovered that I had labeled 
the two specimens from Texas as olivacea whereas they may be 
macrochaeta. These have been returned to the University of 
Kansas and anyone working over that collection in this group 
should see if my labels are intact and correct the determination 
if wrong. 
Var. aenigma new variety 
Very similar to olivacea and doubtfully distinct, but probably 
deserving varietal recognition. The salient characters are the 
maculation of the mesopleura and the more or less distinct vitta- 
tion of the mesonotum. 
Description . — Similar to olivacea with fore tarsi tawny; wing veins more or 
less faintly clouded. Face pale yellow; mesonotum with three or five more 
or less distinct dorsal, and a broad distinct lateral, vittae, brown; mesopleura 
with distinct brown spot or band. Abdominal brown bands dilated medianly 
and attaining lateral margins. 
Holotype. — cf ; Seattle, Washington, VII, 15, 1901, [A. N. 
S. P. No. 6113]. 
Variations. — The following specimens I have included here 
with more or less doubt, and it is not improbable than some may 
represent other varieties. These being females may account for 
the variations from the type. 
Three females: Mt. Constitution, Orcas Island, Washington, 
July 7, 1905, [Aldrich]. These are stouter in build, the color 
design more distinct, face broader and the arista with fourteen 
hairs. The scutellum is smaller, the brown abdominal bands 
rather shining, the third costal section shorter and the veins 
more noticeably clouded. 
A female; Elina, New York, August 24, 1913, (M. C. Van- 
Duzee), [VanDuzee]; has narrower frons and face, the former 
quadrate. The brown abdominal bands are broad and shining, 
hardly dilated or attenuated; veins not clouded. 
Synonytny .—This may be decorus Williston, but I have not 
seen representatives of that species and therefore will not con- 
sider the possibility. 
Xotiphila macrochaeta Loew PI. I, fig. 4. 
1878. Notiphila macrochaeta Loew, Zeit. f. Ges. Natur., 1878, 192. 
In general appearance this species differs little, if at all, from 
olivacea. However, it may be distinguished by the black bristle 
