STUDIES ON THE TAXONOMY AND BIOLOGY OF THE TARSONEMID MITES, TOGETHER WITH A NOTE ON THE TRANSFORMATIONS OF ACARAPIS (TARSONEMUS) WOODI RENNIE. (ACARINA)

Abstract

CANADIAN ENTOMOLOGIST may be found in abundance on the branches of the sycamore, and on almost every.leaf.In addition to eating the pustules of sycamore blight (Gnomonia veneta), they attack the leaf tissue, especially the midrib, where they chew out holes and sections which disfigure the leaves, and leave scars by which diseases may enter.After feeding, the adults oviposit in the stems, which have been newly killed by the blight.Leiopus alpha Say! mentioned in connection with O. myrme.x is tound in the adult stage at the same time.It confines itself to the dead and : dying stems where it feeds exclusively on the blight pustules. Magdalispandura Say.Linglestown, Pa., June 14.Lemoyne, Pa.Reared May 3 from walnut-Kirk and Champlain.Cylindrocopturus binotatus (Lec.)'This species is very common at Harrisburg, Pa.It attacks weakened and possibly healthy staghorn sumac (Rhus hirta).It seems to prefer trees that have reached maturity.and breeds in the sapwood on the main stem and branches.Apteromechus ferratus (Say).Inglenook, Pa.Breeds in outer corky bark of sassafras, and does considerable damage; in fact, there was evidence enough to show that many trees had been killed.Adults emerge during July.Larvae in outer bark and sapwood.