Dunn, 



Cxjrran, C. Howard. New species of Syrphidae 79 



Two new North American Diptera 59 



Two undescribed syrphid flies from New England 65 



Emmett Reid. Additional frogs from Cuba 209 



The amphibians of Barro Colorado Island. 403 



New amphibians from Panama 93 



New frogs from Cuba 163 



New frogs from Panama and Costa Rica 385 



New snakes from Costa Rica and Panama 329 



A new Tree-toad from Jamaica 161 



Felt, E. P. New gall midges from New England 207 



Friedmann, Herbert. The forms of the Orange-breasted Bush-shrike, 



Chlorophoneus sulfureopectus (Lesson) 251 



— : . The forms of the White-browed Robin-chat, Cossypha heuglini 



Hartlaub 327 



. The geographic forms of the Somali Sparrow Passer castan- 



opterus Blyth 427 



. A lark new to science from southern Ethiopia 257 



. Notes on geographic variations in the genus Macronyx with 



description of two new races 263 



. Notes on Sheppardia cyornithopsis with description of a new race 323 



. A Rock Thrush new to science from northern Kenya Colony . . 325 



. The Tanganyikan form of Anthreptes orientalis 383 



. Three new African birds 217 



Grave, Caswell. The ascidian Amaroucium constellatum a valid species. 



PI. 3 27 



Griscom, Ludlow. Revisions of two Central American birds 287 



Harper, Francis. A new Marsh Wren from Alberta 221 



Howe, R. Heber, Jr. A new dragon fly from New England 19 



Jacot, Arthur Paul. A common arboreal moss mite Humerobates hum- 



eralis. P.. 19 369 



Johnson, Charles W. Egg-capsules of the Ten-ribbed Whelk. PI. 1.. ■ 1 



New and interesting species of Diptera 69 



New genera and species of Diptera 21 



New species of Diptera 11 



A review of the New England species of Chrysotoxium 97 



A review of the Platypezidae of eastern North America. PI. 5. 51 



Loveridge, Arthur. A new snake of the genus Lampropeltis 137 



Lucas, Alfred M. The validity of Molgula robusta (Van Name) as a 



species distinct from Molgula manhattensis (De Kay) 243 



McDunnough, James. New Ephemeridae from New England. PL 6. . 73 



Malloch, John R. Notes on Clusiodidae (Diptera) 47 



Melander, A. L. New species of Platypalpus occurring in New Eng- 

 land 83 



Noble, G. Kingsley. New lizards from northwestern Peru 107 



Norman, J. R. A new siluroid fish of the genus Clarias from south- 

 western Uganda. PI. 11 189 



Parker, George H. The time of submergence necessary to drown 



alligators and turtles 157 



