Many decades ago I was taught that the North American entomologists followed the ESA common name protocol - adjective noun separation of words. So if there is an adjective modifying a recognized group, it is separated: honey bee, alkali bee, sweat bee, bee fly, chicken louse, cat flea. Since a butterfly is not a fly, it is a butterfly so you have swallowtail butterfly. *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html