NEW RECORDS OF NATIVE AND INTRODUCED ACULEATE HYMENOPTERA FROM ONTARIO, WITH KEYS TO EASTERN CANADIAN SPECIES OF CERCERIS (CRABRONIDAE) AND EASTERN NEARCTIC SPECIES OF CHELOSTOMA (MEGACHILIDAE)

摘要

The Palaearctic Ancistrocerus gazella (Vespidae) and Spilomena troglodytes (Crabronidae) are recorded for the first time from the Nearctic region based on material from Ontario (both species) and the northeastern United States (A. gazella). Seven species are recorded for the first time from Canada (C), one from eastern Canada (eC) and two from the eastern Nearctic (eN). Sierolomorphidae: Sierolomorpha nigrescens (eN); Sphecidae: Isodontia elegans (eN), I. philadelphica (C); Crabronidae: Tachysphex punctifrons (eC), Ectemnius paucimaculatus (C), Cerceris bicornuta (C); Colletidae: Hylaeus hyalinatus (C); Megachilidae: Chelostoma campanularum (C), Ch. rapunculi (C), Hoplitis anthocopoides (C). The recently recorded Stictia Carolina (Crabronidae) is confirmed as established in southern Ontario. A key to the twenty eastern Canadian species of the genus Cerceris (Crabronidae) is provided, separating for the first time males of several species in the echo, clypeata, and nigrescens species groups. The three eastern Nearctic species of Chelostoma (Megachilidae) are also keyed.