1>4 THE CANADIAN ENTOMOLOGIST. 



described in some degree above, the greatest change occurring at the 

 fourth moult. 



Boisduval, in Lep. de l'Amer., gives a Plate of Caesonia, with larva 

 and pupa, copied from one of Abbot's unpublished sheets. This larva is 

 roughly done, but shows the phase which has a yellow and a black stripe 

 on each segment. The text says the larva feeds on many kinds of Tri- 

 fulium and Glycine, and also Tagetes papposa. 



[n the latter part of the summer and in the fall the females of this 

 soecies are apt to be more or less suffused with rose-pink on under side 

 of hind wing, and about apex of fore wing, and occasionally the male 

 shows something of this at base of hind wing, and around the margins of 

 both wings. Mr. Rowley writes: "The females with red under the wings do 

 not occur at all in the early summer broods. I took scores of butterflies this 

 season in late April, all through May, June and July, and discovered not 

 a streak on one of them. The first examples with red were taken in 

 August. In September they were more numerous, while nearly every 

 female of late October and November were either heavily streaked or 

 solidly red below. I have yet to see a red under-wing of earlier date than 

 August. The feature is surely a seasonal one." 



NOTES ON THE GENUS COLIAS. 



BY H. H. LYMAN, M. A., MONTREAL. 



The discovery by Mr. W. H. Edwards that Colias Hagenii is only a 

 form of C. Eurytheme, as detailed in the Canadian Entomologist for 

 September, while very interesting in itself, serves also to show that this 

 genus is still in a very unsatisfactory state. That a form which so closely 

 resembles PJiilodicc that nine entomologists out of ten would take it for 

 that species, should turn out to be a variety of Eurytheme, emphasizes 

 Dr. Hagen's statement " that reliable differences between these two well 

 known forms are still a want." Mr. Edwards has also come to the con- 

 clusion that Hagenii is the same as the form previously named C. 

 Eriphyle by him, as detailed in the November number of the Canadian 

 Entomologist. A glance at the history of this form will be found 

 interesting. 



