STATE HORTICULTURAL SOCIETY. 187 



(1871), as heretofore stated, we find him expressing the opinion that the 

 two species are identical, or, at least, but varieties of one species, and that 

 the former {E. lanigera) was imported into Europe from this country, 

 which opinion, I believe, he still entertains. 



One or two more facts and suggestions, and for the present I will 

 leave the matter with the reader, that he may form his own conclusion. 



I have repeatedly seen, in the southern part of this State, winged 

 individuals among the colonies of Woolly Plant-lice on the trunks of apple 

 trees; these I always regarded as belonging to these colonies. They cor- 

 respond with the description given by the editors of The Entomologist, in 

 regard to color, size and wings, but were found upon the trunks and limbs 

 of the trees and around the collar at the surface of the ground, and may, 

 for aught I know, have been also on the roots, as I did not extend my 

 examination to these. But it is certain they are quite common on the 

 trunks and branches, in the little fissures, breaks and abraded spots in the 

 bark. Goureau also states that the European species is found on the 

 branches, trunks and roots of the trees. Verrill's description of the speci- 

 mens he found in New England agrees exactly with that of the x\pple-root 

 lice found by the editors of The Entomologist. It appears, therefore, to 

 be pretty well settled that Dr. Fitch was mistaken in reference to where 

 his winged specimens belonged, or that his species differ from the Apple- 

 root louse in the west. It has also been pretty clearly demonstrated that 

 the Woolly Aphis of the trunk and branches is the same as that found on 

 the roots. On the other hand, the preponderance of evidence appears to 

 be against the idea of importation from America to Europe. 



Dr. Fitch's species may be briefly described as follows : The young 

 larvae are scarcely 0.04 of an inch long ; of an oval form, and a pale, dull 

 yellow color. Legs short, robust, and nearly equal in length. The 

 antennae appear much like a fourth pair of legs, and apparently five- 

 jointed. From the tip of the abdomen is usually seen protruding a white 

 filament of flocculent, cotton-like matter. It is proper to state that in 

 some respects this description differs slightly from the appearance of the 

 larvee I have examined from the trunk. 



Winged individuals . — These are nearly a quarter of an inch long to 

 the tips of the closed wings ; body, legs and antennae, coal black ; the 

 head and abdomen covered, on the back with cottony down. Front 

 wings, transparent and slightly smoky, as though sprinkled with fine dust ; 

 veins, black ; the third vein is rather more slender than the first, nearly 

 straight, not forked, its basal third abortive; stigma dark, smoky brown, 

 oblong; its opposite sides nearly parallel, abruptly converging to an acute 

 point at each end. Hind wings, clearer ; the two discoidal veins, black. 



The winged individuals found in Illinois may be briefly described 

 thus : General color, black ; antennae not quite half as long as the body, 

 third joint half as long as the entire antennae ; abdomen, more or less 

 sprinkled with white downy matter. Wings, transparent ; third discoidal 

 vein forked near the middle, its basal portion obsolete ; stigma nearly 

 three times as long as it is wide, pointed at each end, and pale brown. 

 Length, to the tips of the closed wings, about one-seventh of an inch. 



