1916.] NATURAL SCIENCES OF PH1LADP]LP1IIA. 539 
Holotype, cf, McLean, Tompkins County, New York, May 13, 
1916 (Alexander). 
Allotype, 9 , with the type. 
Paratopotypes, 24 cT's, 1 9 ; 1 cf , 1 9 , on May 20, 1916 (P. A. 
Claassen) . 
The type is in the collection of the author; Mr. Claassen has 
deposited his paratj'pes in the collection of the University of Kansas. 
As is very frequent in this genus of flies, abnormalities of the 
wing-venation often occur; one male specimen has cell 1st M-> open 
by the atrophy of the median cross-vein in both wings; four other 
males in the series show adventitious cross-veins or spurs in various 
cells of the wings. 
When Osten Sacken described Tricyphona vernalis,^'" he had only 
a male and a female specimen from Washington, D. C, taken in 
April, these showing the pale antennal bases, cingulated abdomen 
and heavily patterned wings that are characteristic of vernalis. The 
specimens from the White Mountains, New Hampshire, were added 
in the Monographs, p. 271. I am greatly indebted to Mr. C. W. 
Johnson for his kindness in examining the types of vernalis and 
making notes upon them. Abundant material that I have determined 
as vernalis agree in all details with Osten Sacken's descriptions, 
except that the capillary median ground vitta on the prsescutum is 
less distinct than the description implies. 
The gray or brownish gray species of this section of Tricyphona 
may be separated by the following key: 
1. Scape of the anteimse yellowish or brownish yellow, the flagellum 
much darker, dark brown; abdominal tergites brown, the 
margins of the segments pale producing a cingulated appear- 
ance; wings with large rounded clouds at the tips of the 
longitudinal veins and along the cross-veins 
vernalis Osten Sacken. 
Scape of the antennae dark brown, concolorous with the flagellum; 
abdominal tergites brown, unbanded; wings with the pattern 
almost obsolete, reduced to tiny dots and seams 
paludicola, sp. n. 
The following ecological notes on Tricyphona paludicola are taken 
from my field notes, dated May 13, 1916, 10-11 A.M., at the McLean 
bogs where we were engaged in making a biological survey of the 
region under the personal direction of Dr. James G. Needham. 
15 Proceedings of The Academy of Natural Sciences of Philadelphia, 
pp. 291, 292, 1861, as Amalopis. 
