AKT. 15. REVISION OF ICHNEUMON-FLIES — MUESEBECK. 53 



Smith). Doctor Brues's collection has one specimen from Trenton, 

 New Jersey ; that of Cornell University, one from Dryden, New York, 

 and one from Caroline-Hartford, New York. At the Gipsy Moth 

 Laboratory, Melrose Highlands, Massachusetts, there are four speci- 

 mens reared by R. T. Webber, from Mamestra picta, under Gipsy 

 Moth Laboratory No. 12123 ; the host larvae were taken at Melrose 

 Highlands, Lynnfield, and Acton, Massachusetts. 



9, MICROPLITIS QUADRmENTATUS (Provancher). 



Microgaster qmdridentatus rROVANCHEB, Addit. Faun. Canad. Hymen., 



188G, p. 140. 

 MicropUtis terminatvs Weed, Trans. Amer. Eat. Soc, vol. 15, 1888, p. 295. 



Type. — In the Museum of Public Instruction, at Quebec; that of 

 terwinatus is in the Philadelphia Academy of Natural Sciences. 



Canada; Illinois; Massachusetts; New Hampshire; Maine, New 

 York. 



Host. — Arsilonche alboveriosa Goeze. 



Cocoons.— ^.b mm. long; broad; not fluted; pale grayish-brown in 

 color ; and provided with some loose silk at the sides. 



This species is a very well-marked one, not easily confused with 

 any other known species. It is sufficiently well characterized in the 

 table to species. 



Besides the four specimens constituting the type series of termi- 

 natus, which are in the Philadelphia Academy of Sciences, I have 

 seen the following material : in the United States National Museum, 

 specimens from Franconia, New Hampshire (Mrs. A. T. Slosson) ; 

 "Maine"; Canada (C. F. Baker), and two specimens without lo- 

 cality data ; in the Cornell University Collection, one specimen from 

 Ithaca, New York; one from Laval County, Quebec, and one from 

 Montreal, Canada ; in Doctor Brues's collection, two specimens from 

 Essex County, Massachusetts. 



10. MICROPLITIS ALASKENSIS Ashmead. 



MicropUtis alaskcnsis Ashmead, Proe. V.'ash. Acad. Sci., vol. 4, 1902, p. 249. 



Type. — In the United States National Museum. 



Alaska; Washington; Oregon; Colorado; California; Montana; 

 Kansas; Illinois; Massachusetts; New York; British Columbia, On- 

 tario, and Nova Scotia, Canada. 



Host. — Hadena procincta Grote; Plusia, species. 



Cocoons.— 4:.5 mm. in length; ribbed; tapering strongly toward one 

 end, less so toward the other ; greenish in color ; apparently solitary. 



The characters noted in the table to species will suffice for dis- 

 tinguishing this widely distributed form from related species. 



Besides the type, from Juneau, Alaska, the National Collection 

 contains many specimens from diverse localities: from Pullman, 



