PROC. ENTOMOL. SOC. WASH. 103(1), 2001, pp. 184-190 HYLAEUS HYALINATUS SMITH, A EUROPEAN BEE NEW TO NORTH AMERICA, WITH NOTES ON OTHER ADVENTIVE BEES (HYMENOPTERA: APOIDEA) John S. Ascher Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY, 14853-0901, U.S.A. (e-mail: [email protected]) Abstract. — The common and widespread European bee Hylaeus (Spatulariella) hyali-natus Smith (Hymenoptera: Colletidae) is reported for the first time from the New World. During 1997-2000, specimens were collected in Ithaca, Tompkins County, New York. Diagnostic features are described and photographed to facilitate separation of H. hyali-natus from Nearctic Hylaeus species and from the two other Palearctic Hylaeus species previously reported as adventive in North America. Its geographic distribution, host plants, and seasonal history are summarized from the literature and from collections made in New York. Notes are provided on the occurrence of other adventive bee species including the first records of Hylaeus {Spatulariella) punctatus (Brulle) from northern California and of Megachile (Callomegachile) sculpturalis Smith (Hymenoptera: Megachilidae) from New York state. Key Words: Hymenoptera, Colletidae, Megachilidae, adventive insect, distribution. North America Hylaeus hynlinatus is the seventeenth species of bee to be reported as adventive in North America (excluding Apis mellifera L., four other deliberately introduced spe-cies, and Ceratina (Calloceratina) aff. laeta Spinola, which may be adventive in south Texas from the neotropics; Cane, in press). Each of these species is native to the Old World and is thought to have reached North America as a result of accidental anthro-pogenic movement of nests containing dia-pausing bees. Although adventive bees comprise less than 0.5% of North American bee species (Cane, in press), they may com-prise a larger percentage of local faunas, es-pecially in northeastern North America. In Ithaca, Tompkins County, New York, no less than ten species are established and abundant, and these species comprise 3.2% of the total bee fauna of 310 species, and 4.3% of the 231 pollen-collecting bee spe-cies (John Ascher, unpublished data). More adventive bee species occur in Ithaca, New York than have been reported from any oth-er continental locality in the world. The most diverse fauna of exotic bees is likely that of the Hawaiian Islands. The rate of establishment of exotic bee species appears to have increased in recent decades, espe-cially in the northeastern United States. An-thidium manicatum (L.), Chelostoma fulu-ginosum (Panzer), and Chelostoma cam-panularum (Kirby), were discovered in cen-tral New York in 1963 (Jaycox 1967), 1973 (Eickwort 1980), and 1962 (Eickwort 1980) respectively, while the first North American record of Hoplitis anthocopoides came from Albany County, New York, in 1969 (Eickwort 1970). Two additional Palearctic megachilids have recently become estab-



Hylaeus hyalinatus Smith, a European bee new to North America, with notes on other adventive bees (Hymenoptera: Apoidea)

J S Ascher
Proceedings of the Entomological Society of Washington 103: 184-190 (2001)

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