Liparidse 



of the preparations which are made by reputable firms for the pur- 

 pose of destroying the larvse of this and other destructive insects 

 which attack our shade-trees. The spraying should take place at 

 intervals when the young larvse are observed to be moving 

 upward upon the trunks of the trees. 



(3) Hemerocampa definita Packard, Plate XXXVIII, Fig. 



17. ^• 



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. leticostigma applies also to this insect. 



Genus OLENE Hiibner 



(1) Olene achatina Abbot & Smith, Plate XXXVIII, Fig. 9, ^ . 



Syn. parallfla Grote & Robinson; tephra Hiibner; cinuamoniea 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 leucophasa Abbot & Smith, Plate XXXVIII, Fig. 

 7, 5 , Fig. 8, ? . 



Syn. basiflava Packard ; atrivenosa Pahn ; vianto Strecker. 



This is likewise a variable insect, the range of which is prac- 

 tically coincident with that of the last-mentioned species. 



Genus PORTHETRIA Hiibner 



(i) Porthetria' dispar Linnaeus, Plate XXXVIII, Fig. 12, <?, 

 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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