STATE AGRICULTURAL SOCIETY. 
443 
niCKORY. BARK. 
160 . Hickory bark-louse, Lecanium Caryos, new species. (Ilomoptera. 
Coccid*.) 
Fixed to the bark of the small limbs, a large, very convex oval 
scale of a black color fading to chestnut-brown, in May dusted 
over with a white powder. Length often 0.40 by 0.25 in width. 
161. Hickory blight, Eriosoma Carya, new species. (Homoptcra. Aphid®.) 
The under sides of the limbs particularly of bushes and young 
trees in shaded situations coated over with a white llocculent 
down, covering and concealing multitudes of woolly plant-lice 
which are crowded together upon the bark, sucking its juices; 
the winged individuals of a black color, with the head, scutel and 
abdomen covered with a white cotton-like substance, their wings 
somewhat hyaline, the forward pair with an oval salt-white spot 
or stigma towards the tip of their outer margin, their veins all 
very faintly traced or abortive. Length to the tip of the wings 
0 . 12 . 
1 have never noticed this blight in the state of New-York, 
though it no doubt occurs here. It was found common upon 
walnut bushes growing along Henderson river in Illinois, a few 
years since. 
162. Hickory Aphis, Lachnus Cary a, Harris. (Ilomoptera. Aphid*.) 
In clusters on the under sides of the limbs in July and August 
and probably to the close of the season, puncturing the bark and 
extracting its juices, an unusually large plant-louse, 0.25 long 
and to the tips of its wings 0.40, its spread wings measuring 0.72, 
its body of a black color coated over with a bluish white powder 
like the bloom upon a plum, its antennae reaching to the base of 
the abdomen, black and evenly bearded with shortish hairs, as are 
the legs also, the thighs being clear tawny red; wings hyaline, 
smoky at base and along the outer margin, their veins black, the 
rib vein and two first oblique veins very thick and margined with 
smoky, the third oblique vein and its two forks and the short 
fourth vein very slender. See Harris’s Treatise, p. 208. 
I his species clearly pertains to the genus Lachnus as now restricted 
and admirably elucidated in the invaluable volume of Koch. 
