Volume 45 [17 articles]

• Thomas Say's Free-Living Mites Rediscovered, Arthur Paul Jacot
  Volume 45 (1938), Issue 2-3, Pages 121-132
• A Review of the American Bees of the Genus Macropis (Hymen., Apoidea), Charles D. Michener
  Volume 45 (1938), Issue 2-3, Pages 133-135
• A New Genus of Perlidae, Nathan Banks
  Volume 45 (1938), Issue 2-3, Pages 136-137
• Are Ant Larvæ Apodous?, George C. Wheeler
  Volume 45 (1938), Issue 4, Pages 139-145
• The Genus Lithurgus (Hymenoptera: Megachilidæ), Theodore B. Mitchell
  Volume 45 (1938), Issue 4, Pages 146-155
• Notes on North American Nitidulidae, III: Phenolia, Soronia, Lobiopa, Amphotis, C. T. Parsons
  Volume 45 (1938), Issue 4, Pages 156-164
• The Interrelationships and Lines of Descent of Living Insects, G. C. Crampton
  Volume 45 (1938), Issue 4, Pages 165-181