46 Psyche [April 



pennis, with longer costal setulse. All three occur in Europe, 

 the last two are here recorded also from America, where stigma- 

 ticalis has been previously known under the name of Platycnerna 

 imperfecta Loew. The two American species are separable on 

 the following characters : 



First section of the costa with evident setulse, second section 

 with more than ten setulse; hind femora pectinate above 

 with long bristles, hind metatarsi setose above; bristles 

 black; 2-2.25 mm. pectipennis Meigen. 



First section of the costa with very weak setulse, second section 

 with less than ten setulse; hind femora short-pectinate, 

 hind metatarsi not setose above; bristles at least of the 

 lower occiput and of the front coxse whitish; 1-2 mm. 



stigmaticalis Zetterstedt. 



I have specimens of pectipennis from the Pacific slope, its 

 range indicating a continuous distribution through to northern 

 Europe. The following localities are represented: Yellowstone 

 Park, Wyoming; Bovill, Coeur d'Alene, Collins, and Potlatch, 

 Idaho; Olga, Pullman, Spokane, Tacoma and Woodland, Wash- 

 ington; Douglas, Alaska; and Eureka, California. 



M. stigmaticalis, as P. imperfecta, was described from the 

 District of Columbia. There are no further records of its occur- 

 ence in America. I have specimens from the following widely 

 separated localities, which have been compared with Dr. Loew's 

 type of imperfecta, now located in the Agassiz Museum of Harvard 

 University, and with European specimens of stigmaticalis. 

 Boston, Massachussetts; Cold Spring Harbor and Ithaca, New 

 York; Philadelphia, Pennsylvania; Washington, D. C; St. 

 Augustine, Florida; Paris, Texas; Chicago, Ilhnois; Brookings, 

 South Dakota; Lawrence, Kansas; Thompson, Montana; 

 Coeur d'Alene and Potlatch, Idaho; Colfax, Friday Harbor, 

 Index, Mount Rainier, Pullman and Quilcene, Washington; 

 Nelson, British Columbia; and Panama. 



Males of both species have been taken in a light trap at 

 night. Most of the females were caught on windows in houses, 

 a habit originally noted by Zetterstedt. On several occasions 



