156 PKOCEEDJNGS OF THE ACADEMY OF [1892. 



GREENLAND LEPIDOPTERA. 

 BY HENRY SKINNER, M. D. AND LEVI W. MENGEL. 



Four hundred and forty-four insects were taken by the expedition 

 sent to Greenhmd by the Academy in the summer of 1891. 

 They were divided among the different orders as follows : Hymen- 

 optera 25 specimens, Coleoptera 4 specimens, Lepidoptera Rho- 

 palocera 143 specimens and Heterocera 143. They were captured 

 by Levi W. Mengel, entomologist to the expedition and Dr. W. E. 

 Hughes, ornithologist. The specimens are all from the West Coast 

 and were taken at three principal localities: McCormick Bay, 

 Herbert Island and Disco. 



RHOPALOCERA. 



PIERIDJE. 



Colias hecla Lef. 



Fairly common, although few of the specimens were quite perfect. 

 Both sexes were represented. There was one beautiful specimen of 

 the white form of the female, Avhich seems to occur in most if not 

 all the species in the genus. Mr. T. D. A. Cockerell has suggested 

 that all these forms of the female in the different species be called 

 'pallida, and we think the suggestion a good one. Heda, when at rest 

 on the herbage with its wings over its back and its green undersides 

 showing, is said to mimic its surroundings in a remarkable 

 n)anner. This Greenland heda is what jNIr. M'Lachlan called var. 

 gladalls, to distinguish it from the Lapland form and those found 

 further south.^ 



Colias hecla pallida n. var. 9 Ent. News, Vol. 0, No. 3, j)!. 2, fig. 4. 



Expands 40 mm. Upper side: Superiors are the same in macu- 

 lation as in the yellow or normal female, with the exception that there 

 are but two very minute cream-colored dashes on the wide, black 

 marginal border. The inner two-thirds of the wing is cream color 

 with a pinkish tint, obscured by gray near the base. Inferiors 

 with same niaculation as normal female but in color totally different. 

 The spot at the outer end of cell is cream color, and the base of the 

 wing is a steel gray; from this outward to the black marginal 

 border is dark olive-green obscured with gray. Inside of the mar- 



' Proc. Linn. Soc. Lond. Vol. 14, p. 108. 



