200 Journal New York Entomological Society. [Voi. iv. 



Size, form and elytral markings resembling C. scalaris, Leconte 

 but lateral margin unspotted. (Mex.) (Ariz., fide 



Crotch.) C. Sylvia Sial* 



Genus Chrysomela Linne. 

 Marginal groove of thorax not reaching to apex. 



Ovate, green or blue, apterous. Elytra sulcate, finely punctate in regular striae. 



(Alaska) C. subsulcata Mannerheim. 



Oblong, black, winged ; elytra margined with fulvous, intervals irregularly 



punctate. (Colo., Kans., Neb., Dak.) C. flavomarginata Say. 



Like preceding but without yellow elytral margin. (Col. to Ore.) 



C. basilaris Say. 

 Marginal groove of thorax entire. 



Oval, convex, winged, violaceous ; elytra golden green or purple, more or less 



irregularly striato-punctate. (Tex. to Neb.) C. auripennis Say. 



Like preceding but entirely bluish black. (Tex., Idaho, Cal.) 



C. inornata Rogers. 

 Oval, bluish black, apterous. Lateral margin of thorax more incrassate and 



strongly rounded. (Rocky Mts.) C. montevagans Leconte. 



Globosely oval, iTeneous black, subopaque, winged. Elytra finely alutaceous be- 

 tween the punctures. (N. Y. to Fla., Tex. and Mo.) 



C. subopaca Rogers. 



THE DOG'S HEAD BUTTERFLY ON STATEN 



ISLAND. 



By W. T. Davis. 



In the "Canadian Entomologist" for last July and August the 

 fact is recorded that Colias ccesonia, the Dog's Head butterfly, had been 

 taken last June near Toronto and in Southern Manitoba. This southern 

 butterfly has never been recorded from the vicinity of Nevi^ York City 

 and its name does not occur in any of the local lists. Its appearance 

 during the past summer on parts of Staten Island is, therefore, of con- 

 siderable intercbt. A single specimen was taken in June at Eltingville 

 by Capt. Robert D. Wainwright, and on July nth the writer saw quite 

 a number flying across a sandy, over-grown field near Rossville. There 

 was a strong wind blowing and very few of the butterflies tarried on the 

 Asclepias flowers. The- next day there was less wind and several were 

 captured, though they were not so common as on the nth. By the 

 25th of July they had ceased flying. It may be of interest to add that 

 Thecla titus was common this year on the flowers of Asclepias tiibefosa 

 in certain sandy portions of the island. 



*From Crotch's remarks ( Proc. Ac. Nat. Sci. Phila., XXV, ji. 50). I suspect 

 that he has wrongly identified this species and that tlie C. sylvia of Sti\I does not be- 

 long to our fauna. 



