PALAEARCTIC HEMIPTERA OCCURRING IN THE CRAN= BERRY LAKE REGION Horvath* very carefully studied and collated the genera and species of Hemiptera, known to occur in both Europe and America, especially those of the Palaearctic and Nearctic regions. He pre sents evidences to show that many of the species common to both faunas are of Palaearctic origin and that migration took place largely in an eastward direction by the way of Alaska. Many of the species known to occur in both regions have only been taken in eastern and northeastern localities of the United States and Eastern Canada. Although this is not in perfect accord with some of Horvath's theories and evidences, more collecting in the western regions of the United States and Canada will undoubtedly extend the range westward for many of the Palaearctic Hemiptera that have become permanently established in North America. Parshleyt has discussed the Palaearctic Hemiptera known to be established in New England and added a number of species of Heteroptera, which have been recently taken in New England, to Horvath's list, and Knights has treated quite carefully the species of Miridae common to Nearctic and Palaearctic regions. Several species are
apparently of rather recent introduction by human agencies and hence must be considered in a different class from those having naturally holaretic range.
Homoptera Philaenus leucophthalmus Evacanthus acuminates Acucephalus nervosus Acucephalus albifrons Dettocephalus abdominalis Deltoceptalus pascuellus fEuscelis striatulus Euscelis obsoleta Empoasca flavescens Empoasca smaragdula EusCelis striolus Cicadula variata Cicadula 6-notata Balclutha punctata Entpoa Empoa lethierryi Empoa rosae Dikraneura fiebcrt, Alebra albostriella Heteroptera Sciocoris microphthalmus Corizus hyalinas Corizus crassicornis Aradus lugubris Gerris rufoscutellatus Nysius ericae Galeatus peckhami Reduvius personatus Nabis limbatus Nabis ferns Cimex lectularius Miris dolobratus Plagiognathus chrysanthemi Stenodema trispinosum, Teratocoris paludunt, Trigonitylus ruficornis Stenotus binotatus Poeciloscytus unifasciatus Capsus ater Lygus pabulinus Lygus apicalis Lygus pratensis Monalocoris filicis Mecomma ambulans Saldula pallipes Callicorixa praeusta