The genus chaitophorus koch in North america (homoptera, aphididae)
article
A number of samples of Chaitophorus which I collected in Quebec, New Brunswick, Maine and Colorado had to be identified and this lead to a more general study of the species from North America. Dr. F. C. HOTTES and Professor G. F. KNOWLTON at my request collected many samples from willows and poplars, and, with Professor E. O. ESSIG, Dr. L. G. STROM, Dr. H. H. Ross, Dr. G. H. SIMPSON, Professor M. A. PALMER, Professor A. N. TissoT, Dr. J. O. PEPPER, Miss L. M. RUSSELL and Mrs. M. E. MACGILLIVRAY, provided me with type material and other valuable specimens. As a result a complete collection of American Chaitophorus species is available for comparison with the European and Asiatic species. The sclerotisation and surface structure of the integumentum are very useful for the identification of species of this genus. Therefore specimens in balsam had to be cleared and remounted with the technique which I described in 1958. New born larvae or embryones were generally studied. Particular attention was given to the very conspicuous variation in the pigmentation of apterae yiviparae, a phenomenon which is known from some European species, but w^hich seems to be much more common in American members of the genus.
TNO Identifier
457978
Source
Tijdschrift voor entomologie, 103(1-2), pp. 1-30.
Pages
1-30
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