1916.] \\ll RAL SCIENCES OF PHILADELPHIA. 539 



Holotype, d", McLean, Tompkins County, New York, May 13, 

 1916 (Alexander). 



Allotype, ? , with the type. 



Paratopotypes, 24 tf's, 1 9 ; 1 d 1 , 1 9 , on May 20, 1916 (P. A. 

 Claassen). 



The type is in the collection of the author; Mr. Claassen has 

 deposited his paratypes 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 2 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, 15 he had only 

 a male and a female specimen from Washington, D. C, taken in 

 April, these showing the pale antenna! 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 antennae yellowish or brownish yellow, the flagelluin 

 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. 

 36 



