Ontogeny and Systematics of the Genus \u3ci\u3eCerophagus\u3c/i\u3e (Acari: Gaudiellidae), Mites Associated With Bumblebees

Nymphs and adults of Cerophagus nearcticus n. sp. are described from the nest of Bombus terricola occidentalis in California and phoretic associations with B. impatiens in Michigan and New York. On the basis of adult morphology, the genus Cerophagopsis is removed from synonymy with Cerophagus and retained in the family Acaridae, while Cerophagus is transferred to the family Gaudiellidae. The genus Rhypoglyphus is considered a junior subjec­tive synonym of Cerophagopsis. The genera of Gaudiellidae are noted and the genus Trigonacoptes is considered a junior subjective synonym of Gaudiella

Ecology and Host Associations of \u3ci\u3eHistiogaster Arborsignis\u3c/i\u3e (Acari: Acaridae) in the Great Lakes Region, Particularly in the Huron Mountains of Northern Michigan

Histiogaster arborsignis is recorded from subcortical habitats and fungal fruiting bodies in the Huron Mountains of northern Michigan. Deutonymphs were collected from 15 species of Coleoptera, Hymenoptera and Diptera. Additional host and locality records for this species are provided from other areas in the Great Lakes region

A Decade of Urban History: The Historical Urban Studies Series

The first half of the 1990s was a pivotal period in the development and growth of urban history in Europe. In Britain the Urban History Group began to convene again after a decade in abeyance, work commenced on the three-volume Cambridge Urban History of Britain, the Urban History Yearbook became Urban History whilst the European Association of Urban Historians organized their first conference. It was in this climate that Ashgate Publishing commissioned a new monograph series, Historical Urban Studies, under the editorship of Richard Rodger, editor of Urban History, and Jean-Luc Pinol, the leading French urban historian and a key figure in the European Association of Urban Historians (EAUH). The aim of the series was and is to be comparative over both time and space, drawing on multiple locations to explore what is common and what distinctive about the urban experience of diverse towns and nations. The broad agenda for the series was shaped by an overarching concern with the administration and governance of the city which underpinned attempts to manage the social, economic and political challenges wrought by 300 years of urban change. In particular, the editors stress the importance of the comparative element which should allow historians to distinguish ‘which were systematic factors and which were of a purely local nature’. The editors set themselves an ambitious agenda and this essay aims to explore how the series has developed over the ten or so years since it commenced publication; the degree to which it has provided a platform for advancing the sub-discipline of urban history; and to consider some future directions which urban history might take

Systematics, Ecology and Host Associations of \u3ci\u3eNaiadacarus\u3c/i\u3e (Acari: Acaridae) in the Great Lakes Region

Naiadacarus arboricola Fashing, is reported from adults collected from water-filled treeholes and deutonymphs phoretic on Mallota species, Eristalis bardus and Somula decora (Diptera: Syrphidae) from Michigan, Illinois, and New York. Naiadacarus fashingi, new species, is described from deutonymphs phoretic on Brachypalpus oarus and seven other species of Syrphidae from Michigan, New York and New Jersey. Naiadacarus mydophilus, new species, is described from deutonymphs phoretic on Brachypalpus oarus from Michigan. Based upon known biologies of host insects and other mite species which utilize these hosts, it is hypothesized that N. lashingi and N. mydophilus may inhabit wet decaying wood andior moist treeholes rather than water-filled treeholes. Naiadacarus is hypothesized to be closely related to the genera Schwiebea, Histiogaster and Thyreophagus. The subfamily name Naiadacarinae is placed in synonymy with Rhizoglyphinae