1915] Banks — Notes and Descriptions of Pipunculidce 167 



Pipunculus sororius Cr. 

 This is common here in June, July and August. I think this 

 should be nitidiventris Lw. 



Pipunculus subvirescens Lw. 



From Falls Church, Va., in June and August agree with descrip- 

 tion; the hind trochanter is rather angularly produced but there 

 is no spine. 



Pipunculus constrictus Bks. 



Cresson has recorded a specimen that did not have a constricted 

 abdomen, and I have taken a male. Falls Church, Va., 14 May, 

 which also has the abdomen normal; the appendiculate vein (as in 

 type) is very short, and in one wing practically obsolete, but the 

 vein angularly bent at that place. 



Pipunculus brevis Cr. 



Specimens from Great Falls, 5 June, 13 August. All show the 

 appendiculate vein as figured. The males (agreeing in venation 

 with the females) have the abdomen rather narrow, the segments 

 narrowly velvety black on base; on fifth segment interrupted in 

 middle; the apical part of fifth rather silvery, and depressed in the 

 middle; the hypopygium not bent under, hardly one-half as long 

 and not nearly as wide as fifth segment, with an oblique cleft to 

 the right, and of a dark brown color. In Cresson's table the male 

 runs to appendiculatus, from which it is separated by normal occi- 

 put, velvety bands on abdomen, paler legs, etc. 



Pipunculus fuscus Lw. 



Various specimens from Falls Church, and Glencarlyn, Va., 

 in June, July, August and September, are larger than cingulatus, 

 the abdomen being longer and more slender; the tibise generally 

 paler. The fourth section of the fourth vein is much more sinuate 

 than in my specimens labelled cingidatus, but Cresson has figured 

 it the opposite way. 



Pipiuiculus caudatus Cr. 



From Falls Church and Glencarlyn, Va., in May, June and 

 September, specimens which agree with the type and have the 

 quadrate hypopygium. 



