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40
Journal of the Lepidopterists' Society
and size of larvae, which leads to age-linked changes in the tendency to aggregate.
Acknowledgments
I thank Dr. J. Alcock for reviewing this manuscript and his encouragement to pursue this project. Also, I appreciate the suggestions and help in identification of specimens from Dr. F. Hasbrouck.
Literature Cited
Bush, G. L. 1969. Trail laying by larvae of Chlosyne lacinia. Ann. Ent. Soc. Amer.
62: 674-675. Drummond, B. A., Ill, G. L. Bush, & T. C. Emmel. 1970. The biology and
laboratory culture of Chlosyne lacinia Geyer (Nymphalidae). J. Lepid. Soc.
24: 135-142. Edwards, W. H. 1893. Notes on a polymorphic butterfly, Synchloe lacinia, Geyer
(in Hub. Zutr.), with description of its preparatory stages. Can. Ent. 25: 286-291. Emmel, T. C. & J. F. Emmel. 1973. The butterflies of southern California.
Natural History Museum of Los Angeles County, Los Angeles. 148 p. Ghent, A. W. 1960. A study of the group-feeding behaviour of larvae of the
jack pine sawfly, Neodiprion pratti banksianae Roh. Behaviour 16: 110-148. Gorodenski, S. A. 1970. The genetics of three larval color forms in Chlosyne
lacinia and the phenotypic frequencies of this polymorphism in natural populations. M.S. Thesis. Ariz. State Univ. 43 p. Neck, R. W. 1973. Foodplant ecology of the butterfly Chlosyne lacinia (Geyer)
(Nymphalidae). I. Larval foodplants. J. Lepid. Soc. 27: 22-33.
A MELANIC FORM OF PHIGALIA STRIGATARIA (GEOMETRIDAE)
A dark geometrid moth was caught by the author at black light at Lebanon, New Jersey on 5 April 1972. A genitalic slide proved it to be a melanic form of Phigalia strigataria Minot. On p. 128 of "A revision of the New World Bistonini," Frederick H. Rindge states that he never saw a melanic specimen of P. strigataria. This apparently is the first verified one. I gave the specimen with genitalia slide to the American Museum of Natural History, New York.
Compared with Phigalia titea form "deplorans" no difference can be detected. Forewing length of this strigataria from apex to base is 16 mm. Small sizes of "deplorans" are also found, but most are larger. Colors of both are the same.
Joseph Muller, R.D. 1, Lebanon, New Jersey 08833.