The tenebrionid genus Epipedonota (Pimeliinae: Nycteliini) consists of 23 species from southern South America. A cladistic analysis of the species of Epipedonota is conducted suggesting that this genus forms a monophyletic group defined by synapomorphies from external morphology and male genitalia. A cladistic biogeographic analysis of 14 areas of endemism in southern South America is performed using seven taxa inhabiting this area. Subtree analysis to these taxon-area cladograms leads to 84 general area cladograms. A consensus tree is presented to show the common vicariant events from all cladograms. The proposed vicariant events which split the ancestral biota are the uplift of the Andean mountain range and resulting ecological and climatic change as well as marine transgressions. The status of area conservation for Epipedonota is examined using the phylogenetic information. Illustrations of external morphology, internal skeletal anatomy and genitalic features, cladograms, and a map with the areas of endemism are included.

The results of a computerized cladistic analysis of the Nearctic checkered beetle genus Aulicus Spinola (Coleoptera: Cleridae: Clerinae) are presented. Seventeen adult morphological characters (7 multistate, 10 binary) were used to investigate the cladistic relationships of the fifteen valid species of Aulicus. Two Nearctic species of the genus Trichodes Herbst were used as outgroup taxa. Cladistic analysis with the parsimony computer program NONA yielded three equally parsimonious trees, each with thirteen nodes supported by unambiguous character optimizations, and having length 64, consistency index 50, and retention index 52. The strict consensus of these three trees has eleven resolved nodes.

One new species of Copris Geoffroy with two subspecies is described from the mountains of Mexico, Guatemala and El Salvador. Copris boucardi Harold is redescribed. Drawings of the dorsal habitus, pronotum and a distribution map are provided.

Xanthonia dentata from Colorado, Kansas, New Mexico and Texas and X. pilosa from Arizona and Utah are described as new, illustrated, and compared to known species.

A new genus and a new species of ceratophyllid flea is described from Chihuahua, Mexico, taken in the nests of the thick-billed parrot, Rhynchopsitta pachyrhyncha (Swainson, 1827). Diagnostic features of the taxon are illustrated. Observations on the nesting habits, and the endangered status of the host are discussed and the status of our knowledge of the ceratophyllid bird fleas is summarized.

New provincial distribution records are provided for 40 Ephemeroptera species in Canada based on the examination of specimens held in the Canadian National Collection of Insects. Nine species are newly reported for Alberta, four for British Columbia, five for Manitoba, 12 for New Brunswick, 10 for Nova Scotia, two for Ontario, four for Quebec, and one for Prince Edward Island. Of these, Ameletus amador Mayo, Cinygmula reticulata McDunnough, and Procloeon vicinum (Hagen) are reported from Canada for the first time.

The distributions of the 6 genera and 23 species of Helotrephidae now known from Thailand are summarized and additional records given. Fischerotrephes is recorded from Thailand for the first time. Distributions of the individual genera within Thailand are discussed and a maps depicting collection records of all species known from Thailand are presented.

A new species of Amnestus Dallas, A. ficus is described. Its life cycle, and immature stages are also included and illustrated. The association of Cydnidae with the fruits of various species of Ficus is reported for first time. The study is based mainly on two-year sampling in a small patch of medium rain forest on the coast of Veracruz, combined with records from Chiapas, Guerrero, and San Luis Potosi, Mexico.

For the first time, data on the habitat, feeding habits, and immature stages of Spalacocoris sulcifer are reported. This insect is unusual in living in tunnels of ginger plant stems.

A nest of Vespula squamosa (Drury) is described including colony size, biomass, and ecological impact. This is the largest vespid nest described from North America to date.