131 
siiephesses Testlinatus in America. 
€ By O. W. Ogsttunp, University, Minn. 
he December number of the News there appeared an in- 
g article on the of Chaitophorus negundinis 
» as observed in by Mr. Bragg. The follow- 
é and corrections may therefore be timely as attention 
ow been called to this peculiar form in America. I found 
he quite abundant on the maples in Minneapolis in 1897, 
ve since observed it at various places in Minnesota. 
Brag it appar, unaware of Keer paper onthe 
the most complete on the subject. The dimorph 
i aphid. Balbiani and Signorett later proved its 
UNE the Clatebhaiks c0 the maple. since consid- 
is Chellophorus eceris (L.) Koch, 1854. They also came 
RUNNING fast the Gieolegh, after covtioning in an ux. 
SUM Gcadiicn Sir sont, gt last periches ant comes to 
‘nought. Kessler, in the above mentioned article, showed that 
thre distinct species had been included under Chaitophorus 
‘aceris by authors, quite similar in general appearance but very 
- 5 variety Kessler assigns to the original Chaitophorus 
Koch., 1854; a brown variety he ascribes to Chai- 
_ fophorus testudinatus (Thorn.) Kessl., 1886; the third variety 
iis described as new under the name Chaitophorus lyropictus 
_ Kessl., 1886. The first two have a summer generation that re- 
as larva in an unchanged condition for three months or 
after which they resume active life and pasg through the 
i itsecy cocks As adults they proved to be the sexupara 
_ Producing the true sexes: the apterous females and winged 
males. The dimorph of the first differs from the second in 
EU cad ta dat tnty act being Satsened. 
Kessler, Nova Acta Leop-Carol. Akad., Vol. st, pp. 151-178. 1886. 
_ Thornton, Trans. Micr. Soc. London, Vol. 3. 1852. 
2 Balbianj et Signoret, Comptes rendus Acad. Sci., Vol. 14. 
