The genus Ormyrus has a worldwide distribution and
comprises about sixty recognized species. The higher
taxonomic relationships of the genus are uncertain, as
evidenced by its placement in the families Ormyridae,
Pteromalidae, or Torymidae. Here, the genus is described
in detail and a preliminary catalog of the world species
is...
Members of the deltocephaline leafhopper genus Giprus Oman
live on grasses, primarily in the desert-scrub, chaparral, and
marine sand dune communities of western North America. Of 16
known species, 10 are undescribed. Recharacterization of the genus
results in exclusion of Laevicephalus incongruus Oman. Differentiation
of species is primarily dependent on...
Reinterpretation of the leafhopper tribe Scaphytopiini reveals it
to be primarily a New World taxon with only limited representation in
the Palearctic, Oriental and possibly Ethiopian regions. Approximately
75 species assigned to three genera are known from the United
States and Canada with at least another 75 species representing an...
The subfamily Aphrodinae is represented in the Nearctic Region by eight species contained in a single tribe, Aphrodini, and genus Aphrodes. The external and internal morphology, biology and ecology of the Nearctic members of the genus Aphrodes were investigated. Distributional evidence indicates that six of the eight species, belonging to...
The genus Tiaja Oman consists of eight known species of flightless
leafhoppers of the subfamily Megophthalminae found along the
western coast of North America between British Columbia and
northern Mexico. Species occurring from the San Francisco Bay
area northward are restricted to a narrow coastal zone within 1 km of...
Four key aspects of the relationship between predatory hoverflies and the aphid pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley, Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli...
The genus Deraeocoris Kirschbaum of western America north of
Mexico was revised. Approximately 10,000 specimens from the Nearctic
Region were examined. Taxonomic characters used by previous authors
were reevaluated. In addition to the male parameres, the male vesica
and the female posterior wall of the bursa copulatrix and sclerotized
rings...
The male genitalia of 69 species, representing eight genera of
sphecid wasps, were examined in order to ascertain their taxonomic
value. In all, the male genitalia of approximately 1000 specimens
were critically studied.
Emphasis was placed on the genitalia and associated sclerites
of the known males in the genus Eucerceris....
The genus Coenonycha contains 30 described species of small to
medium sized scarabs. They are found in the arid and semi-arid
regions of western United States and northern Baja California. The
adults feed at night on several genera of xerophylous plants.
An examination of the male genitalia of the 19...