248 



in (n in is straighter, hut each vein is slightly curved. Legs as in Thamnonoma, 

 being long and slender; hind tibia- scarcely swollen; the tarsi three-fourths 

 as long as the tibiae. The male abdomen is rather stout, less slender than in 

 Thamnonoma. 



The only species known is ochreous-yellow, with an outer row of sub- 

 hyaline patches common to both wings. 



Ii closely resembles Thamnonoma brunnearia in the form of the head, 

 antenna 1 , and palpi, and shape and venation of the wings, differing in the 

 longer pectinations and stouter abdomen and mode of coloration. 



This may be regarded as a mimetic form, as it imitates Abraxas of Europe 

 (of which we have no species) in the mode of coloration and in the stout 

 abdomen, and the colors of the larva, which probably caused it to be referred 

 with doubt to Abraxas by Dr. Fitch, who says that it cannot lie referred to 

 Abraxas, this also being the opinion of Dr. Harris. I regard Abraxas as a 

 synthetic genus, anticipating Thamnonoma. As Dr. Fitch was the first to 

 make known this moth, and describe its transformations, I respectfully dedi- 

 cate tht 1 genus to him. 



EuFiTCHiA riuearia Packard. Plate 9, fig. (il. 

 Abraxas? ribearia Fitch, Trans. N. Y. Ag. Soc, vii, 1848. 



5 3 and 5 9 . — This common moth may be readily recognized by the 

 uniform yellow ochreous tint on body and wings, and by the submarginal 

 row of smoke-colored spots common to both wings, the spots in the middle 

 of each wing being large. On the fore wing is a discal dot. sometimes a row 

 of spots running over it, with two costal spots. 



Length of body, 3, 0.50. 9, 0.53; of fore wing, <?, 67, 9, 0.61; ex- 

 panse of wings, 1.25-1.30 inches. 



This moth is everywhere abundant in the. Northern State^ Hying in 

 gardens and resting on the leaves of the currant and other plants 



Larva. — Body smooth, cylindrical, of uniform width throughout; head 

 as wide as the body, with four black snots; on each wing above four black 

 spots, and live on each side; ground-color yellowish-white. It appears on the 

 leaves of the currant as soon as they unfold in May, and attains its (nil size 

 in July, transforming into brown pupa' of the usual form just beneath the 

 surface of the soil under the bush, the moth appearing early in July. It is 

 represented on Plate 13, tig. 2. 



