Biodiversity, systematics, morphology, and evolution
Lin Q-B, Huang D-Y - Description of Caenoephemera shangyuanensis, gen. nov., sp. nov. (Ephemeroptera), from the Yixian Formation … 747
Behan-Pelletier VM, Earner B, Clayton M - Mycobatidae (Acari: Olibatida) of Pacific Northwest canopy habitats … 755
Smith ABT, Génier F - Revision of the genus Holocephalus (Coleoptera: Scarabaeidae: Scarabaeinae: Coprini) … 777
Physiology, biochemistry, development, and genetics
van Engelsdorp D, Otis GW - Field evaluation of nine families of honey bees for resistance to tracheal mites … 793
Hansen EM, Bentz BJ, Turner DL - Physiological basis for flexible voltinism in the spruce beetle (Coleoptera: Scolytidae) … 805
Pogoda MK, Pree DJ, Marshall DB - Effects of encapsulation on the toxicity of insecticides to the Oriental fruit moth (Lepidoptera: Tortricidae) and the predator Typhlodromus pyri (Acari: Phytoseiidae) … 819
Behaviour and ecology
Hansen EM, Bentz BJ, Turner DL - Temperature-based model for predicting univoltine brood proportions in spruce beetle (Coleoptera: Scolytidae) … 827
Fielding DJ, Brusven MA, Shafii B, Price WJ - Spatial heterogeneity of low-density populations of Melanoplus sanguinipes (Orthoptera: Acrididae) associated with grazing and vegetation treatments … 843
Strong WB, Bates SL, Stoehr MU - Feeding by Leptoglossus occidentalis (Hemiptera: Coreidae) reduces seed set in lodgepole pine (Pinaceae) … 857
EI-Sayed AM, Fraser HM, Trimble RM - Modification of the sex-pheromone communication system associated with organophosphorus-insecticide resistance in the obliquebanded leafroller (Lepidoptera: Tortricidae) … 867
Morandin LA, Laverty TM, Kevan PG, Khosla S, Shipp L - Bumble bee (Hymenoptera: Apidae) activity and loss in commercial tomato greenhouses . . . 883
Erratum … 895
Index to volume 133 … 897
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