354 
LEPIDOPTERA. 
in color. In the males (Plate VI. Fig. 0), the thorax and 
upper side of the fore wings are generally white, the latter 
spotted with black ; the hind wings and abdomen, except the 
tail, deep ochre-yellow, the former with a few black spots 
near the hind margin, and the abdomen with a row of six 
black spots on the top of the back, two rows on the sides, 
and one on the bellv: the under side of all tlie winces and the 
thighs are deep yellow. It expands from one inch and seven 
eighths to two inches and a quarter. The female (Plate VI. 
Fig. 10) differs from the male either in having the hind Avings 
Avhite, instead of ochre-yelloAv, or in having all the Avings 
ashen-gray Avith the usual black spots. It expands tAvo in¬ 
ches and three eighths or more. Sometimes, though rarely, 
male motlis occur Avith the fore Avings ash-colored or dusky. 
Professor Peck called this moth pseuderminea^ that is, false 
ermine, and this name Avas adopted by me in my communi¬ 
cation to the Agricultural Society. Professor Peck’s name, 
hoAvever, cannot be retained, inasmuch as the insect had been 
preAuously named and described. Drury, the first describer 
of the moth, called the male Caprotina^ and the female Aerea* 
supposing them to be different species ; but the latter name 
alone has been retained for this species by most naturalists. 
In order to lessen the raA-ages of the salt-marsh caterpil¬ 
lars, and to secure a fair crop of hay Avhen these insects 
abound, the marshes should be moAved early in July, at 
Avhich time the caterpillars are small and feeble, and, being 
unable to Avander far, Avill die before the crop is gathered in. 
In defence of early moAving, it may be said that it is the only 
Avay by AA'hich the grass may be saved in those meadoAvs 
Avhere the caterpillars haA^e multiplied to any exent; and if 
the practice is folloAved generally, and continued during seA"- 
eral years in succession, it Avill do much toAvards extermi¬ 
nating these destructive insects. 
By the practice of late moAving, Avdiere the caterpillars 
abound, a great loss in the crop Avlll be sustained, immense 
* The proper orthography is Acraa. 
