THE CANADIAN ENTOMOLOGIST. 117 



Argyrogramma omega, 29, fig. 373-374- 



" Savannah." Guenee' refers this as a synonym to verruca, and pro- 

 bably correctly. Hiibner's figure represents a species with a single silvery 

 ringlet and no exterior mark. 



Aletia argillacea, 32, fig. 399-400. 



" Bahia." I have identified this with the Noctua xylina of Say, Proc. 

 Am. Ass. Adv. Sci., 13, 1874. This species seems to have spread from 

 Brazil .and Central America to the West Indian Islands, from whence dur- 

 ing the last half of the last century it made its appearance in the cotton 

 fields of the United States. Here the cotton plant is an annual, and the 

 insect is brought face to face with a longer winter and a perishable food- 

 plant. From my experiments I believe that in the central (and of course 

 the northern) portions of the cotton belt the fall escaping and hybernating 

 moths perish before the new cotton plant is large enough in the spring to 

 receive their eggs. No experiments have yet substantiated the successful 

 hybernation in any portion of our increasing cotton territory. It seems 

 probable in default of this evidence that the Eastern worms come from 

 the flights of the moths from the West Indies, the Western from south- 

 west continental sources, always supposing that from the advance of 

 cotton growing towards the Mexican frontier a locality has not been 

 reached in that direction where the insect can sustain itself, owing to the 

 relative shortness of interval between the crops or by having an alternative 

 food-plant on which the earliest worms are nursed. It is evident that the 

 cotton plant and the Aletia must be studied together to arrive at a true 

 conclusion. 



Septis mucens, 9, fig. 415-416. 



" Pennsylvania." I have identified this species in Belfrage's Texan 

 collections, Can. Ent., xi., 206. Guenee' gives Florida as locality after 

 Doubleday, and Pennsylvania probably after Hiibner. Has it been taken 

 in the Middle States ? Belfrage sends a suffused variety, as I regard it, 

 together with the typical form as figured by Hiibner and described by 

 Guenee. Guenee refers the insect to Xylophasia. It has hairy eyes and 

 I have placed it in Mamestra. 



Agnomonia sequistriaris, 10, fig. 419-420. 



" Georgia." Guenee' refers this species as identical with anilis Drury, 

 I think without doubt correctly. 



