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  1. Adventive Hylaeus (Spatulariella Popov) in the new world (Hymenoptera: Apoidea: Colletidae)
    By: Ascher, John S - Gambino, Parker - Droege, Sam
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 108
    Date: 2006
    Page Range: 237--239
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  2. A Survey of the Bees of the Black Rock Forest Preserve, New York (Hymenoptera: Apoidea)
    By: Giles, Valerie - Ascher, John S
    Type: Article
    In: Journal of Hymenoptera Research
    Volume: 15
    Date: 2006
    Page Range: 208--231
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