POPLAR CATERPILLARS. 457 



verse anterior line below the median vein, and a similar streak at internal margin. 

 Transverse anterior line dark brown, grayish at costa, undulate, bordered anteriorly 

 by a pale buff shade from below subcostal vein to internal margin. Median space 

 widest at costa, narrow at internal margin, grayish, with an elongate pale discal 

 spot with dark brown center. Transverse posterior line cinereous, indistinct, sub- 

 dentate, continued. Terminal space with a series of rich chestnut-brown streaks 

 between the veins , two more, linear, near the apex. Posterior wings pale cinereous 

 with two indistinct median bands; anal angle touched with brownish. Thorax 

 and collar brownish; tegulae grayish ; abdomen cinereous, slightly brownish above. 

 Under surface of thorax and inside of legs brownish, outside of legs and sides of tho- 

 rax clothed with cinereous hairs. Expanse of wings 1.60 inches. (Grote.) 



28. CEdemasia concinna Abbot and Smith. 



The moth has been bred by. Mr. Elliott from the willow, and I have 

 found it in different stages of growth on the willow at Brunswick, Me.^ 

 in August and September. It also feeds on the aspen and blackberry 

 in Maine. I have also found the caterpillar feeding on the huckleberry 

 ( Vaccinium). 



"This curious and well-known caterpillar was received in August 

 from Oregon. Mr. F. S. Matteson, of Aumsville, states that he found 

 it in large numbers on a young apple tree, entirely denuding the 

 branches of leaves. This mention is made as bearing upon the geo- 

 graphical distribution of the species. The gregarious habits of these 

 larvae when first hatched admit of an easy remedy in hand-picking." 

 (Kiley, Rep., 1884.) 



Mrs. Anna K. Dimmock gives a summary of its history (Psyche, iv, 

 p. 282) as follows : 



Notodonta concinna Abb. and Smith (Nat. Hist. Lepid. Ins. Ga., 1797, v. 2, p. 169, 

 pi. 85). Harris (Repc. Ins. Injur. Veg., 1841, pp. 307-309) describes larva and imago 

 of this species, and gives as food-plants apple, cherry, plum, Bosa and Cratwgus; this 

 description is quoted by Morris (Synop. Lepid. N. A., 1862, p. 242), and is repeated 

 with figures of larva and imago (Treatise on Ins. Injur. Veg., 1862, pp. 425, 426, pi. 6, 

 fig. 11) and with a colored figure of the larva by Harris (Eutom. Corresp., 1869, p. 

 303, pi. 1, fig. 3). Riley (Amer. Entom., September and October, 1869, v. 2, p. 27) 

 figures larva, pupa, and imago, and adds pear to the food-plants; Riley's figures ar© 

 repeated by Saunders (Can. Entom., July 1881, v. 13, pp. 138-140). The larva alsa 

 eats Behila alba. 



Larva after first moZ<.— Length 7™'", body rather slender; head reddish black, 

 with two long vertical tubercles; body reddish amber, with indistinct broken yellow 

 lines; two long dorsal tubercles on first and fourth segments, much longer than 

 those on the outer segments, the tubercles not so conspicuous as in the next stage. 

 August 14. 



Larva after second molt. — Body bright yellow ; head jet black with two tubercles 

 on the vertex ; second segment with a jet-black transverse mark. Each of the other 

 segments has a transverse row of eight or ten small black short tubercles, those of 

 the dorsal region being the longest Between these are a few whitish hairs. Anal 

 segment, thoracic and abdominal feet pitchy dark. Length 12""". 



After the second molt some of the larvte are ichneuraoned. September 2 an ichneu- 

 mon larva had issued from the ventral side of the caterpillar and spun a white thin 

 cocoon; the nearly dead caterpillar was fastened by its back to the cocoon. After 



