The whitefly fauna of Europe and the Mediterranean Basin comprises 56 species that are considered to be native or naturalized, accommodated within 25 genera. Presented here are a check-list, an identification key to puparia, and a brief account of each species including its distribution and host-plant range. The puparium of each species is illustrated. One new nomenclatural combination (Aleuroclava similis, from Aleurotuberculatus) and two new synonymies (Parudamoselis kesselyaki with Ceraleurodicus varus, Asterobemisia nigrini with A. paveli) are proposed. Three nominal species (Aleurodes capreae, A. fraxini, and Aleyrodes campanulae) are here treated as nomina dubia. Species which, in the study area, have only been recorded from glasshouses are discussed. Four additional species, not yet recorded from the region, are included in the discussion, two of them because a particular quarantine risk is perceived and two because they are notifiable pests in European Union quarantine legislation.

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An updated check list of the world’s extant whitefly species is presented, comprising 1556 accepted species names in 161 genera, together with a further 210 species-group names and 40 genus-group names in synonymy. 13 nomina nuda, seven nomina dubia and six species now formally excluded from the Aleyrodidae are listed. Nomenclatural changes introduced here are 10 new generic and 10 new specific synonymies, together with 23 new combinations, seven new replacement names for junior homonyms and one revived original combination. Three subfamilial names are available in the Aleyrodidae, most species being placed in the Aleyrodinae or Aleurodicinae. The controversial third subfamily, Udamoselinae, is briefly discussed. For species currently regarded as valid, only the original and current combinations are given, with authorities. Original countries of description are given, here updated to reflect current geopolitical boundaries, but distributions and biological data are not given. An index to all names is provided.

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The genus Aleurodicus is discussed in the context of the whole subfamily Aleurodicinae, and is fully revised with 35 species now included, 10 of them newly described here. The genus Lecanoideus Quaintance & Baker is here regarded as a junior synonym of Aleurodicus syn. nov., and Aleurodicus fucatus Bondar is proposed as a junior synonym of A. capiangae Bondar syn. nov.. Palaealeurodicus gen. nov. is described to accommodate six native Asian species hitherto included in Aleurodicus, along with one new species here described. Aleuroctarthrus gen. nov. is proposed to accommodate Aleurodicus destructor Mackie. Two species are here transferred from Aleurodicus to other genera. Puparial keys are provided to the worldwide genera of Aleurodicinae, and to the described species of Aleurodicus and Palaealeurodicus. Lectotypes are here designated for 11 species of Aleurodicinae, and a neotype for one species. A check list is provided to all the species treated in this paper. The paper is illustrated with 144 figures including 7 plates of habitus photographs.

A field survey of Sternorrhyncha (Hemiptera) in Belize, principally conducted within the Chiquibul Forest Reserve (CFR), has revealed almost 200 species of whiteflies, all but 40 of them belonging to the subfamily Aleyrodinae. Provided here is an illustrated account of described Belize species of Aleyrodidae-Aleyrodinae. This account proposes three new generic synonymies, three new specific synonymies, nine ten combinations, one revalidated species and provides descriptions of three new genera and 12 new species. Two appendices are provided: a check list, which includes species remaining undescribed, and the associated host-plant genera or families (when known) of all putative species; and a summary of taxonomic changes proposed here. Line drawings and/or photographs of slide-mounted puparia are provided for all described species, and photographs alone are provided for a few of the more distinctive species that remain undescribed.

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A severe 5-day lake-effect storm resulted in eight deaths, hundreds of injuries, and over $3 million in damage to a small area of northeastern Ohio and northwestern Pennsylvania in November 1996. In 1999, a blizzard associated with an intense cyclone disabled Chicago and much of the U.S. Midwest with 30-90 cm of snow. Such winter weather conditions have many impacts on the lives and property of people throughout much of North America. Each of these events is the culmination of a complex interaction between synoptic-scale, mesoscale, and microscale processes. An understanding of how the multiple size scales and timescales interact is critical to improving forecasting of these severe winter weather events. The Lake-Induced Convection Experiment (Lake-ICE) and the Snowband Dynamics Project (SNOWBAND) collected comprehensive datasets on processes involved in lake-effect snowstorms and snowbands associated with cyclones during the winter of 1997/98. This paper outlines the goals and operations of these collaborative projects. Preliminary findings are given with illustrative examples of new state-of-the-art research observations collected. Analyses associated with Lake-ICE and SNOWBAND hold the promise of greatly improving our scientific understanding of processes involved in these important wintertime phenomena.