The Canadian Entomologist

SOROKA, J.J., and D.T. SPURR - Geographic incidence and damage levels of alfalfa seed chalcid, Bruchophagus roddi (Hymenoptera: Eurytomidae), in Saskatchewan, and its relationship to weather and agronomic variables and production practices …1-11

RÉGNIÈRE, J., and P. DUVAL - Overwintering mortality of spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae), populations under field conditions …13-26

LARSON, D.J., and R.W. WOLFE - Revision of North American Agabus (Coleoptera: Dytiscidae): the semivittatus-group …27-54

PECK, S.B. - Revision of the Colenis of America north of Mexico (Coleoptera: Leiodidae: Leiodinae: Pseudoliodini) …55-65

BOEVE, P.J., and M. WEISS - Spatial distribution and sampling plans with fixed levels of precision for cereal aphids (Homoptera: Aphididae) infesting spring wheat …67-77

de GROOT, P. - Life history and habits of the white pine cone borer, Eucosma tocullionana (Lepidoptera: Tortricidae) …79-90

GRAY, D.R., F.W. RAVLIN, and J.A. LOGAN - Microprocessor-controlled mini-environmental chambers capable of subfreezing temperatures in constant or time-varying temperature regimes …91-104

SCIENTIFIC NOTES

MASON, P.C., J.D. PINTO, Z.L. LONG, and J.L. HARRIS - First record of Trichogramma inyoense (Hymenoptera: Trichogrammatidae) attacking the bertha armyworm, Mamestra configurata (Lepidoptera: Noctuidae) …105-106

EBLING, P.M., J.W. BARRETT, and B.M. ARIF - Pathogenicity of the Ireland strain of nuclear polyhedrosis virus to spruce budworm, Choristoneura fumiferana, larvae …107-108

HEATH, J.J., S.O. GAUL, D.M. NASH, R.F. SMITH and O. KUKAL - Evidence for a female-produced sex pheromone in the apple leaf midge, Dasineura mali (Kieffer) (Diptera: Cecidomyiidae) …109-110

REPLIES TO FORUM

(Replies to Gilbert, N., and D.A. Raworth. 1996. Insects and temperature - a general theory 128: 1-13)

LAMB, R.J. - Insects and temperature - some comments on a general theory …111-114

GILBERT, N., and D.A. RAWORTH - Insects and temperature - further evidence …115-117

EDITOR’S ACKNOWLEDGMENTS …118

INSTRUCTION TO AUTHORS …i-ii

DIRECTIVES AUX AUTEURS …iii-iv