INSECTS INJURING OAK-LEAVES. 135 
187. Orgyia definita Packard. 
Mr. R. Thaxter informs me that this species feeds on the oak. Mr. 
Otto Seifert has also bred the insect in all its stages, but as far as I am 
aware has not published his description. 
Moth. — Female. Umber-brown. Head, thorax, base, and inner margin of prima- 
ries more testaceous. A faint, basal, dark, straight, transverse line. Beyond and 
near the linear lunate discal spot, which is surrounded by the testaceous brown, is an 
indistinct nearly straight line. An outer very distinct curved line, being straight 
from the costa to where it is angulated on the fifth subcostal nervule, and again half 
way between the discal spot and internal margin. Beyond this line on the costa is 
an oblong, dark, well-defined spot, succeeded by a submarginal row of dots, ending 
in a white spot near the internal margin. Beneath, lighter. Lines faintly seen be- 
neath, the outer one extending faintly onto the secondaries, which have a discal dot. 
The markings are much more distinct in this species than in 0. leucosligma, while 
the outer line is angulated nearer the middle. Length of body, 9 > 0.60 ; exp. wings, 
1.20 inches. 
188. Parorgyia achatina (Abbot and Smith). 
In their great work on the Lepidoptera of Georgia, Abbot and Smith 
state that this caterpillar feeds on various species of oak as well as on 
the hickory. " It spun on the 3d of May and the moth came out on the 
20th." The moths of both this and the next species are very rare in our 
collections, though the caterpillars may be more commonly met with. 
18). Parorgyia parallela Grote and Rob. 
(Larva in hibernation stage. Plate xxxv, Fig. 3.) 
Although I am strongly inclined to consider this species as a syno- 
nym of P. achatina Abbot and Smith, yet until we have more specimens 
in all stages from the Southern States, the present specific name may 
be retained. I have a single small female from Florida, which differs 
somewhat from Abbot's figure of P. achatina, aud yet seems to belong 
to that species and to agree in many respects with a series of females 
of P. parallela in my collection. 
Our northern specimens have been bred by Mr. Otto Seifert,* of New 
York, and I have received some from Rev. G. D. Hulst, the latter of 
which have been pronounced to be P. parallela by him, by Mr. Graef, 
and also by Mr. Eoland Thaxter. I have also raised the larva from 
eggs received both from Miss Morton, of Newburgh, K Y., and from 
a lot of eggs received from Mr. Thaxter and kindly sent by him from 
Aiken, S. C. 
The males of what I take to be P. parallela (%=P. achatina) and P. 
clintonii (=P. leucophcea), are difficult to separate, while the females 
are readily separable. 
In the male of P. parallela the outer or extradiscal line curves out- 
ward before reaching the costa, and then bends inward on the costa; 
* See Entomologica Americana, iii, 93. 
