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Kiskeya new genus and two new species (K. baorucae and K. neibae), from the Dominican Republic are described and illustrated. Kiskeya is compared to Monotalla Bechyne, Normaltica Konstantinov, and Clavicornaltica Scherer. Geographic ranges in which Greater Antillean endemics have closest relatives in the Old World are discussed.
The behavior and mating duration of virgin Lasioderma serricorne adults was studied under two sets (temperatures 27.5 ± 0.5°C and 24 ± 0.5°C, Rh 65 ± 3% and 75 ± 3% correspondingly) of controlled climatic conditions. It was found that copulation, estimated from the moment the adults were found in “end to end” position up to the moment that the male and female separated from each other, fluctuated from 48 to 130 min for the two above mentioned conditions. No statistically significant differences were observed between the two sets of controlled climatic conditions used (dt = 78, t = 1.3, P = 0.197). Although damage in stored tobacco is mainly caused by the insect's larvae, it was found that 4% of male and 9.4% of female adults also fed on dried tobacco leaves.
New records establish the presence of the Ripiphoridae in the Maritime Provinces of Canada. Ripiphorus fasciatus (Say) is newly recorded from both New Brunswick and Nova Scotia. The bionomics of the genus, species of host bees, developmental history, and the status of the group in the region are all briefly discussed.
Resource partitioning strategies can help us understand the origin and maintenance of highly diverse communities. We collected 205 dung beetle species (Coleoptera: Scarabaeidae: Scarabaeinae) associated with many different kinds of resources in southeastern Peru. We focus only on extreme cases of resource specialization of species occupying unusually narrow ecological niches, rather than the broad range of specialists which exists. The natural history of most of these species is previously unknown, and several have been considered very rare. Although dung beetles were captured with all types of dung, including avian, reptile and invertebrate dung, species did not specialize exclusively on certain dung types. Ten species appeared to specialize exclusively on a single non-dung food resource, including fruit, fungus, carrion, dead invertebrates, and live millipedes. The diets of 15 species captured only by hand or with passive flight intercept traps are unknown, and these included species in unusual genera such as Anomiopus, Bdelyrus, Canthonella, Dendropaemon, and Sinapisoma. Eleven species appeared to specialize exclusively on a restricted habitat or microhabitat such as riverine beach, Guadua bamboo patches, river alder forest (Tessaria), attine ant nests, or abandoned termite nests. Four species of Canthon were forest canopy specialists. The apparent rarity of some of these species, such as Canthonidia rubromaculata Blanchard, Deltochilum valgum Burmeister, Ontherus laminifer Balthasar, and Ontherus raptor Génier, may only be due to their unusual habits, while other species, such as Megatharsis buckleyi Waterhouse, appear to be genuinely rare. We also discuss the implications of these findings for sampling methodology and assessment of species abundance distributions.
Field observations on the natural history and development of Eubulus parochus (Herbst) in north central Vermont, U.S.A. are described. The weevil's associations with its host tree, butternut (Juglans cinerea L.), and the fungus causing mortality of the tree throughout its range in North America are discussed. Decline of butternut may threaten the future existence of E. parochus. Alternative host tree species are unconfirmed, but suspected, since the weevil's reported geographic range extends beyond the range of J. cinerea.
The first known fossil species of Trypanaeus Eschscholtz (Histeridae: Trypanaeinae), Trypanaeus hispaniolus, new species, is described and figured from the remains of two females preserved in Early Miocene (Burdigalian) Dominican amber. The fossil history of Histeridae along with the higher-level classification of the subfamily Trypanaeinae is briefly discussed. An addition to the existing key to species of the genus is provided in order to accommodate the new fossil species described herein.