OF SMITHSONIAN PUBLICATIONS. 269 



OSTEN SaCKEN, R. — 



Bibliography of diptera 270 



Catalogue of described diptera of North America 102, 270 



Diptera of Kerguelen Island 294 



Directions for collecting and preserving diptera 102 



Monograph of Tlpulidce 219 



Monographs of diptera of North America. Part iv 219 



OsTEN Sacken, R. ; Loew, H. Instructions for collecting diptera. (R. 1858.) 109 

 OsTEN Sacken, R. ; Loew, H. Monographs of diptera of North America. 



Parts I, II 141, 171 



Osteology and mounds of the mound-builders of Wisconsin — J. N. De Hart. 



(R. 1877) 323 



Osteology of Oph(osaurus ventralls — R. W. Shxtfeldt. (P. 1881) 467 



Ostraciontidse (trunk fishes), a study of, with notes on American species — G. B. 



Goode. (P. 1879) 333 



Othonops eos, a new gobioid fish from San Diego, Cal. — R. Smith. (P. 1881.) 467 

 Outline of scheme of classification of collections in U. S. National Museum — 



G. B. GoouE. (P. 1881) 467, 457 



Outline of systematic review of the class of birds — W. Lilljeborq 364 



Owen, D. D. Catalogue of geological specimens. (R. 1854) 75 



Owen, D. D. Report on building stones. (R. 1847) H, 329 



Owen, R. D. Hints on public architecture P 



Owl, description of a new, from Porto Rico — R. Ridgway. (P. 1881) 467 



Ox, American, extinct species of — J. Leidy 41 



Oxygen and its combinations, lecture on — G. I. Chace. (R. 1855) 77 



Ozone and antozone—C. M. Wethebill. (R. 1864) 188,355 



Ozone, notice of C. F. Schoenbein, the discoverer of. (R. 1868) 224 



