30 Annals of the Carnegie Museum. 



gheny County. They are particularly common on Aristolochia ifiacro- 

 phylla, The Dutchman' s-Pipe -Vine. 



Family PIERID/E. 



37. Pontia protodice Boisduval & Leconte. 



July 28-August 27. Common. 

 37a. Pontia vernalis Edwards. 



Pittsburgh, April 18-28 (Engel & Marloff). 

 38g. Pontia napi var. virginiensis Edwards. 



New Brighton, April 4-26 (Merrick) ; Pittsburgh, April 9-30 

 (Engel & Marloff). 



40. Pontia rapae Linn^us. 



April 23-October 6. This common species may be observed 

 throughout the season from early spring until the occurrence of heavy 

 frosts. (The editor has observed it on the wing on several occasions 

 in January and February, when there had been a succession of mild 

 days. ) 

 40b. P. rapae var. immaculata Skinner & Aaron. 



New Brighton, April 23, 1899 (Merrick). 

 52. Callidryas eubule Linnaeus. 



(The editor has twice observed this species on the wing in Pitts- 

 burgh, but failed to take the specimens. The late Dr. John Hamilton 

 took it on one occasion near Tarentum, and a worn specimen was cap- 

 tured in the early summer of 1908 by Mr. Hugo Kahl.) 

 61. Zerene caesonia Stoll. 



Wilmerding (Foerster). A rather worn specim'en, the date of cap- 

 ture of which was unfortunately not preserved. 



65. Eurymus eurytheme Boisduval. 



New Brighton, September 25 (Merrick) ; Pittsburgh, October 22 

 (Marloff) ; Jeannette (Knechtel) ; Wilmerding (.Zahrobsky). 



66. Eurymus philodice Godart. 



April 22-May 20; June 27-July 3; August lo-November 9. 

 There are apparently three broods in the season. The white female 

 occurs frequently, especially in the summer brood. 



Var. nigridice Scudder. 



One male in fine condition is contained in the Merrick Museum, 

 collected by Mr. Glasser, August 20, at Millvale, Pa. 

 83. Eurema nicippe Cramer. 



New Brighton, September 23 (Merrick) ; Pittsburgh, May 6 



