THE CANADIAN ENTOMOLOGIST 401 



THE LIFE-HISTORY AND EARLY STAGES OF CORY- 

 THUCHA PARSHLEYI GIBSON. 



BY HARRY B. WEISS AND EDGAR L. DICKERSON, NEW BRUNSWICK, N.J. 



This species was described by E. H. Gibson in the Trans. 

 Amer. Ent. Soc. XLIV, 69-104, April 4, 1918, from specimens 

 collected by us on walnut at Hammonton, N.J. In the above 

 publication, Gibson states that the food plants are walnut and 

 juneberry {Amelanchier intermedia) . When we first collected this 

 species on walnut, specimens were submitted to Mr. Parshley to- 

 gether with specimens of C. cydonice from juneberry. When Mr. 

 Parshley sent the specimens to Mr. Gibson for description, it is 

 quite possible that the host labels might have been accidentally 

 changed. However, repeated visits to the type locality, Ham- 

 monton, N.J., and numerous examinations of both walnut and 

 juneberry have resulted in finding the species only on the former 

 plant. 



In New Jersey we have found parshleyi at Hammonton on 

 butternut {Juglans cincerea), walnut {Juglans nigra) and Japanese 

 walnut {Juglans sibboldiana) , and at Cedarville and Bridgeton on 

 walnut. An additional locality in New Jersey is Ramsey, by Dr. 

 F. E. Lutz. Records of its occurrence outside of New Jersey are: 

 Lake Waccamaw, N.C., April 20, (on pecan) tR- W. Leiby) and 

 Great Falls, Va., Sept. 5, (on walnut) (Coll. of H. G. Barber). 

 It undoubtedly occurs in many other localities and is possibly 

 wrongly labeled in collections as Corythucha juglandis Fitch. 



The following observations relative to C. parshleyi were made 

 at Hammonton, which is in the southern part of New Jersey. 

 Overwintering adults appeared about the middle of May, and 

 during the third and fourth weeks of this month egg laying was 

 well under way. From one to four eggs were laid in the angles 

 formed by the mid-rib and the side ribs on the under leaf surfaces. 

 Some eggs were found upright in the leaf close to the mid-rib and 

 removed from the vein angles, while others were inserted in the 

 base of the mid-rib, projecting parallel to the leaf surface. Most 

 of them, however, were found in the vein angles in groups of two 

 or three, each egg being more or less perpendicular to the leaf 

 surfaces. Here they were partly hidden by pubescence, only the 



December, 1918 



