90 Journal of the Mitchell Society {^August 



what trees we may reasonably expect to suffer from the attacks 

 of this insect, although it is probable that not all of the trees 

 given will be seriously troubled. 



Apple, (Pyrus mains L.) Several young trees growing under 

 the overhanging branches of badly infested red maples found 

 slightly infested. 



Bed Maple. (Acer rubrum L.) Generally infested. 



Silver Maple. (Acer saccharinum L.) Uniformly and badly 

 infested. 



Sugar Maple. (Acer saccharum Marsh.) A few scattering 

 individuals found infested, mostly very slightly. 



Box Elder. (Acer negundo L.) A few infested. 



Buckeye.. (iEsculus glabra Willd.) Slightly infested. 



Japanese Chestnut. (Castanea sativa.) Badly infested . 



Sycamore. (Platanus occidentalis L.) Slightly infested. 



Water Oak. (Quercus nigra L.) A single tree slightly in- 

 fested. 



White Oak. (Quercus alba L.) A few trees slightly infested. 



Iron-wood. (Carpinus caroliniana Walt.) A single badly 

 infested tree. 



Willow. (Salix sp.) A small badly infested tree found 

 along a stream in Lincoln County. 



Cottonwood. (Populus deltoidea Marsh.) Slightly infested 

 tree. 



American Elm. (TJlmus americana L.) Slightly infested. 



Mulberry. . (Morus rubra L.) Badly infested. 



The complete life history of this insect is yet to be worked 

 out, and it is our intention to work this out this summer. We 

 have determined, however, that the females give birth to living 

 young, the first young from overwintering adults being born 

 about the 10th of May. These young molt twice and reach ma- 

 turity in summer and then give birth to living young. The 

 exact number of generations each year is not known. Neither 

 is the male insect known save for a brief description of two 

 "male" dorsal scales given by Comstock in the original descrip- 

 tion of this insect. Comstock states that the insects beneath 

 these scales were dead and much shrivelled. Strange to say, 



