1874.1 219 



midsummer or a little later ; it frequents flowers of Silciie, &c., in 

 gardens, and also the wild Asclepias cormda. The ^ vai-ies in expanse 

 from 3 J to 3i inches ; the ? is sometimes fully 4^ inches. 



Pieris oleracea. — Hitherto rare ; in three years I have only taken 

 two specimens, June ISth and 29th. I have, indeed, noticed two 

 others about the same time of the year. 



[P. rapce. — Not yet observed, but it will probably be here shortly, 

 as it is said to have reached Ohio.] 



P. Protodice.—Xbuwdi'Mii during August and September in locali- 

 ties where its food-plants (naturalized species of Sinapis, &c.) are 

 common. It frequents the flowers of native Asters, also those of the 

 nauseous Mayweed {Maruta cofuJa). I have taken specimens from 

 the first week in June to the third week in October, (J much more 

 common than $ . 



Towards night these butterflies may be easily captured without 

 using a net. As evening approached I have often observed them 

 when at rest for the night sitting on the liffht coloured flowers of 

 native Asters, or on the light coloured radical leaves of the mullein 

 {Verhascum fliapisus), or on the tohite flowers of the Mayweed; but 

 60 correct is their instinct in avoiding contrast of colours when choos- 

 ing their nightly abodes, that, to casual observation, they would be 

 by no means conspicuous. 



Colias CcEsonia. —ToleTiihlj common in its localities in August 

 and September, the ^ much more common than the ? ; the latter sex 

 varies much, differing greatly from the ,^ in late specimens. There is 

 probably but one brood in the year. It is a southern species. 



C. Chrysofheme. — Much less common here lately than any other 

 species of the genus, and scarcer than usual last summer. Specimens 

 have been taken from the third week in June to the second week in 

 October. The ^ more abundant than the ? , at least as two to one. 

 The ? vai'ics especially in depth of colour, and the (^ varies in size and 

 in breadth of border. 



C. Philodice. — The commonest butterfly we have, and far more 

 variable both in size and mai'kings than any other species. I have ^ 

 specimens which expand from ly to 2f inches, and ° specimens If to 

 2^ inches. It is most abundant during August and September. A 

 variety of the ? , nearly white, is very scarce. 



Terins Delia. — Scarce. Specimens in good condition, taken in 

 August and September. 



