190 BIOLOGICAL SURVEY OF 



C. rowena Knal). (15673). Bar Harbor, .June 12. Hart'. 

 C. philadelphica (Linn.) (15674). Common. It feeds on 



{Spireae) and alder. Stations F122 and F199. 

 C. philadelphica var. spireae (Say) (15074a). As the name 



indicates, it prefers (Spireae). Mt. Desert, July (McAtee). 

 C. bigsbyana (Kby.) (15677). Eden, July 16; Corfield, Aug.; 



Station P242; Eden on alder Sept. 17; Also feeds on willow. 

 C. alni Schaeffer (21358). Mt. Desert, May 2; Penikese on 



alder, Sept. 20. 



Plagiodera Redtenbacher 



P. vebsicoloba (Laich.) (15693). Reared from larch trunks 



Oct. 



Gastrophysa Chrevrolat 



Gr. polygoni (Linn.) (15701). Sweeping grass and Poly- 

 gonum. The latter is its food plant. Bar Harbor, June 17. 



Chrysomela Linnaeus 



C. INTEERUPTA Fao. (15708). Bar Harbor, June; Mt. Desert 

 (Br.), June 15. The variety with all legs red was also 

 taken. 



C. tremulae Fab. (15709). An introduced European species. 

 Bar Harbor, July 10. 



Phyllodecta Kill iy 



L. vulgatissima (Linn.) (15717). Eagle Lake; Seal Harbor 

 (Stowell), July 18-Aug. 15. Tt feeds on willow and poplar. 



P. Americana Schaeffer. (21365). (vulgatissima Auct. non 

 Linn?). One specimen taken Station F278. 



Tkirhabda Leconte 



T. yirgata Lec. (15726). Very common especially in Sept. 

 and can be swept any place. Feeds on goldenrod. 



Galerucella Crotch 



G. conferta (Lec.) (15744). All of this genus has its par- 

 ticular plant on which it is found. Sweeping individual 

 plants should be followed and a careful record kept. Sta- 

 tion F288; F343. 



