Volume 19 [59 articles]

• The Stanford Expedition to Brazil: New Bees Fr0m Brazil, T. D. A. Cockerell
  Volume 19 (1912), Issue 2, Pages 41-61
• The Stanford Expedition to Brazil: A New Sawfly From Brazil, S. A. Rohwer
  Volume 19 (1912), Issue 2, Pages 62-63
• A Peculiar New Crane-Fly From Porto Rico (Tipulidæ; Diptera), Charles P. Alexander
  Volume 19 (1912), Issue 2, Pages 63-66
• Observations on Micoutalis Calva Say, Ignaz Matausch
  Volume 19 (1912), Issue 2, Pages 66-69
• The Period of Incubation of the Eggs Samia Cecropia, Phil Rau
  Volume 19 (1912), Issue 2, Pages 69-70
• The Cleridæ of the Stanford Expedition to Brazil, A. B. Wolcott
  Volume 19 (1912), Issue 3, Pages 71-77
• The Development of the Mouthparts in the Homoptera, With Observations on the Embryo of Siphanta, F. Muir and J. C. Kershaw
  Volume 19 (1912), Issue 3, Pages 77-89
• New Names for Some Ants of the Genus Formica, William Morton Wheeler
  Volume 19 (1912), Issue 3, Pages 90-90
• The Red-Margined Luna, a New Variety, William T. Davis
  Volume 19 (1912), Issue 3, Pages 91-92
• On a Supernumerary Median Ocellus in Melanoplus Femur-Rubrum, M. W. Blackman
  Volume 19 (1912), Issue 3, Pages 92-96