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Testimonial to Dr. Holland on his Eightieth Birthday
Vol 19, Iss 1, Page 11
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The Argynnids of the nokomis group
Vol 19, Iss 1, Page 15
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Notes upon some North American species and varieties of the genus Brenthis
Vol 19, Iss 1, Page 35
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List of types of recent fishes in the collection of the Carnegie Museum on September 1, 1928
Vol 19, Iss 1, Page 51
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Some Cretaceous Mammals from the Lance formation
Vol 19, Iss 2, Page 107
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A collection of Paleocene Mammals from Bear Creek, Montana
Vol 19, Iss 2, Page 115
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Notes upon some Gyrinidæ in the Carnegie Museum with descriptions of new species
Vol 19, Iss 2, Page 123
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Celtis microëndocarpica Brooks not a Lithospermum
Vol 19, Iss 2, Page 135
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A list of Prionid beetles taken at Kartabo, Bartica district, British Guiana, with the description of a new species
Vol 19, Iss 2, Page 139
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New species and varieties of North American butterflies
Vol 19, Iss 3, Page 155
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Two new subspecies of Melitæa harrisi, with remarks upon related forms
Vol 19, Iss 3, Page 161
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A new toad of the genus Eupemphix
Vol 19, Iss 3, Page 167
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The Occurrence of lizards in Pennsylvania
Vol 19, Iss 3, Page 169
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The poisonous Snakes of Pennsylvania and the treatment of snake-bites
Vol 19, Iss 3, Page 175
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Notes on some American butterflies, mainly relating to their classification and nomenclature
Vol 19, Iss 3, Page 185
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Herbert DuPuy [Obituary]
Vol 19, Iss 4, Page 211
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Daniel Winters [Obituary]
Vol 19, Iss 4, Page 215
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James Dickey Hailman [Obituary]
Vol 19, Iss 4, Page 217
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Hon. Josiah Cohen [Obituary]
Vol 19, Iss 4, Page 221
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Dr. William Barnes [Obituary]
Vol 19, Iss 4, Page 223
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The Mammalian fauna of Pennsylvania
Vol 19, Iss 4, Page 225
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Notes on some South American Gerridae
Vol 19, Iss 4, Page 235
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Notes on some South American Nabidae, with descriptions of new species (Hemiptera)
Vol 19, Iss 4, Page 241
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The systematic status and breeding habits of Eupemphix trinitatis Boulenger
Vol 19, Iss 4, Page 249
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Errata and Corrigenda
Vol 19, Page xi