408 Forty-sixth Report on the State Museum [68] 



** Apple-root Blight, *^. pyri. Black, more or less pruinose, 

 with a tuft of cotton-like down on the tergum and commonly 

 a smaller one on the head; fore wings hyaline, with a black 

 stigma and nerves, the externo-medial nerve hyaline towards 

 its base; inner edge black from the base to the apex of the 

 first nerve, hyaline beyond. Length, 0-20. Common on the 

 wing in groves, in autumn. On the roots of a young apple 

 tree brought me from a nursery, excrescences were observed, 

 the crevices in which were found to be covered with small 

 lice-like larvae, among which some winged individuals occurred 

 which proved on examination to be this species, from which 

 circumstance its habits are inferred and ts name bestowed. 

 No. 862, male. 



*^ Alder Blight, ^JE. tessellata. Dull bluish-black; tergum with 

 the segments marked by strongly impressed lines and covered 

 by white down in square checker-like spots. Length, 0-16. On 

 the under side of branches of the alder, [Alnus rubra, Marsh.) 

 crowded together and concealed beneath a dense covering of 

 snow-like down. I have searched in vain for winged 

 individuals of this species. ISJ^o. 863. 



®^ Beech-tree Blight, E. ijnhrlcator. Black; three last segments 

 of the abdomen blue-pruinose; stigma brown; longitudinal 

 nerve and a line on the middle of the inner margin black. 

 Female (?) winged; abdomen fulvous, with a black spot on 

 the disk; legs pallid. Larva pallid, with 2 fuscous dorsal 

 stripes; posterior half of the abdomen covered with a tuft of 

 cotton-like down, from which proceeds two longer and coarser 

 filaments. Length, 0-22. On the under sides of the branches 

 of the beech tree, covered with snow-white down. On the 

 slightest jar of the branch, a shower of tiny drops of a water- 

 like fluid falls from these insects. Having met with no 

 description of the E, fagi, (Linn.,) or its habits, I am unable 

 to ascertain whether that insect is dissimilar to ours. No. 864, 

 male; 865, female (?); 866, larva. 



