Liparidae 
of the preparations which are made by reputable firms for the pur¬ 
pose of destroying the larvae of this and other destructive insects 
which attack our shade-trees. The spraying should take place at 
intervals when the young larvae are observed to be moving 
upward upon the trunks of the trees. 
(3) Hemerocampa definita Packard, Plate XXXVIII, Fig. 
17, a. 
This species, which is closely allied to the last, is found in the 
northern Atlantic States. What has been said as to the habits of 
H. leucostigma applies also to this insect. 
Genus OLENE Hiibner 
(1) Olene achatina Abbot & Smith, Plate XXXVIII, Fig. 9, $ . 
Syn. parallela Grote & Robinson; tephra Hiibner ; cinnamom'ea Grote & 
Robinson. 
The moth, which is somewhat variable in the style and 
intensity of the dark markings upon the wings, is found in the 
Appalachian subregion, but is somewhat more frequent in the 
south than in the north. 
(2) Olene leucophaea Abbot & Smith, Plate XXXVIII, Fig. 
7, $ , Fig. 8, $ . 
Syn. basifiava Packard; atrivenosa Palm; manto Strecker. 
This is likewise a variable insect, the range of which is. prac¬ 
tically coincident with that of the last-mentioned species. 
Genus PORTHETRIA Hubner 
(1) Porthetria'dispar Linnaeus, Plate XXXVIII, Fig. 1 2,$, 
Fig. 13, $. (The Gypsy Moth.) 
This well-known insect is a native of the Old World. A 
number of years ago, a gentleman interested in entomology, and 
residing at the time in Cambridge, Massachusetts, received from 
a friend in Europe a number of cocoons of the moth, from which 
the insects in due season emerged. A few of the number were 
prepared and mounted in his cabinet, and the remainder were 
allowed to escape through the window of the room in which 
they were. Unchecked by the presence of parasites, which in 
their native habitat keep their numbers down, they rapidly mul¬ 
tiplied and became a scourge. Fully a million of dollars has thus 
far been expended in the effort to exterminate them. In spite of 
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