STATE AGRICULTURAL SOCIETY. 443 



HICKORY. BARK. 



160. Hickory bark-louse, Lecanium Carya, new species. (Ilomoptera* 

 Coccidae.) 



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 Caryce, new species. (Homoptera. Aphidae.) 



The under sides of the limbs particularly of bushes and young 

 trees in shaded situations coated over with a white flocculent 

 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 co\^ered 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 tlieir outer margin, their veins all 

 very faintly traced or abortive. Length to the tip of the wings 

 0.12. 



I 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 Caryce, Harris. (Homoptera. Aphidae.) 



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 measiu'ing 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 l)eing 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 f ^rks and the short 

 fourth vein very slendfT. See Harris's Treatise, p. 208. 



Tliis species clearly pertains to the genus Lachnus as now restricted 

 and admirably elucidated in the invaluable volume of Koch. 



