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 tlie 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. 



IB'J. 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 oi P. achatina Ahhot 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, and 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. Roland Thaxter. I have also raised the larva from 

 eggs received both from Miss Mortoji, of Newburgh, N. 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. 



