Forum 

Identification of African-Derived Bees in the Americas: A Survey of Methods. 
Walter S. Sheppard and Deborah R. Smith . . . 159 

Systematics 

Revision of the Genus Lobogonius (Hemiptera: Coreidae: Coreinae: Colpurini). 
Harry Brailovsky . . . 177 

Synopsis of the New World Nemapalpus (Diptera, Psychodidae, Bruchomyiinae) with Description of Four New Species. 
L. W. Quate and J. B. Alexander . . . 185 

Redescription of the Male of Coenaletes caribaeus (Collembola: Coenaletidae) Associated with Hermit Crabs (Decapoda: Coenobitidae). 
Jose G. Palacios-Vargas, Leopoldo Q. Cutz, and Carmen Maldonado . . . 194

Genera and Allometry in the Stag Beetle Family Lucanidae, Coleoptera
Kazuo Kawano . . . 198

Toxoneuron (Hymenoptera: Braconidae): Designation of a Neotype for Its Type Species, T. viator, and Discovery of a Possible Senior Synonym of its Best Known Species, T. nigriceps
I. Mercado and R. A. Wharton . . . 208 

Ecology and Population Biology 

Interaction Between the Larval Endoparasitoid Campoletis sonorensis (Hymenoptera: Ichneumonidae) and Its Host the Tobacco Budworm (Lepidoptera: Noctuidae). 
Jing Sheng Hu and S. Bradleigh Vinson . . . 220 

Biology and Larval Feeding Habits of Coexisting Hydroptilidae (Trichoptera) from a Small Woodland Stream in Northeastern Ohio. 
J. B. Keiper and B. A. Foote . . . 225 

Dung Beetle Geographic Diversity Variation Along a Western Iberian Latitudinal Transect (Coleoptera: Scarabaeidae). 
J. Hortal-Munoz, Fermin Martin-Piera, and Jorge M. Lobo . . . 235 

Biology and Energetics of Tropisternus lateralis nimbatus (Coleoptera: Hydrophilidae) in a Playa on the Southern High Plains of Texas. 
R. E. Cook and J. H. Kennedy . . . 244 

Arthropod Biology 

Imaginal Feeding of Twelve Nemouroidean Stonefly Species (Insecta, Plecoptera). 
Jose Manuel Tierno de Figueroa and Antonino Sanchez-Ortega . . . 251 

Nest Selection, Usurpation, and a Function for the Nest Entrance Plug of Centris bicornuta (Hymenoptera: Apidae). 
S. Bradleigh Vinson and Gordon W. Frankie . . . 254

Development and Reproduction of the Psocid Liposcelis bostrychophila (Psocoptera: Liposcelididae) as a Function of Temperature
Jin-Jun Wang, James H. Tsai, Zhi-Mo Zhao, and Lung-Shu Li . . . 261 

Arthropods in Relation to Plant Diseases 

Influence of Aster Yellows Phytoplasma on the Fitness of Aster Leafhopper (Homoptera: Cicadellidae). 
L. Beanland, C. W. Hoy, S. A. Miller, and L. R. Nault . . . 271 

Conservation Biology and Biodiversity 

Biodiversity and Rarity Of Phyllophaga (Coleoptera: Scarabaeidae) in a Temperate Hardwood Forest. 
Marlin E. Rice and Edward G. Riley . . . 277 

Physiology, Biochemistry, and Toxicology 

Nuclear and Cytoplasmic Changes in the Culex pipiens (Diptera: Culicidae) Alimentary Canal During Metamorphosis and Their Relationship to Programmed Cell Death. 
J. T. Nishiura and D. Smouse . . . 282 

Vitellogenin in Pupal Hemolymph of Diatraea grandiosella (Lepidoptera: Pyralidae). 
F. Zeng, S. Shu, S. B. Ramaswamy, and A. Srinivasan . . . 291 

Effects of Queen Attractiveness to Workers on the Queen Nutritional Status and Egg Production in the Polygynous Solenopsis invicta (Hymenoptera: Formicidae). 
Y. P. Chen and S. B. Vinson . . . 295 

Morphology, Histology, and Fine Structure 

Comparative Anatomical and Histological Study of the Alimentary Canal of the Dendroctonus frontalis (Coleoptera: Scolytidae) Complex. 
Elba Diaz, Ramon Cisneros, and Gerardo Zuniga . . . 303 

Discovery of Mycangia and Mucus in Adult Female Xiphydriid Woodwasps (Hymenoptera: Xiphydriidae) in Japan. 
Hisashi Kajimura . . . 312 

Association of Mandible Shape and Nesting Material in Osmia Panzer (Hymenoptera: Megachilidae): A Morphometric Analysis. 
Neal M. Williams and Karen Goodell . . . 318 

Behavior 

Nesting Behavior of Oxybelus lamellatus Olivier (Hymenoptera: Sphecidae). 
J. Tormos, J. D. Asis, S. F. Gayubo, M. Portillo, and F. Torres . . . 326 

Proximate Constraints on Intruder Detection in the Dragonfly Perithemis tenera (Odonata: Libellulidae): Effects of Angle of Approach and Background. 
Paul V. Switzer and Perri K. Eason . . . 333 

Temperature-Dependent Parental Investment in the Giant Waterbug Belostoma flumineum (Heteroptera: Belostomatidae). 
S. L. Kight, M. Batino, and Z. Zhang . . . 340 

Possible Fisherian Changes in Female Mate-Choice Criteria in a Mass-Reared Strain of Ceratitis capitata (Diptera: Tephritidae). 
R. D. Briceno and William G. Eberhard . . . 343 

Book Review 

The Isometopinae (Heteroptera: Miridae) of Africa, Europe and the Middle East By A. E. Akingbohungbe
Reviewed by Carl W. Schaefer . . . 346