INDEX TO VOL. XII. 



Abnormal cocoons, 410. 

 Acaiithacara acuta, 336. 

 Acanfhasier Eliisii, .385. 

 Acanthoclerus immanis, 340. 

 Acanthodis antennafus, 332. 

 Accipiter Cooperi, 120. 



fuscus, 120. 

 Accommodation in the eyes of birds, 



400. 

 Aceratodes, 323. 

 Acridium labratum, 339. 



occidentale, 339. 

 Actitis incanus, 303. 

 Actitiirus Bartramiu.s, 123. 

 Actodromas Bonapartei, 122. 

 maculata, 122. 

 miuutilla, 122. 

 ^gialitis melodus, 122. 



semipalmatus, 122. 

 vociferus, 121. 

 Wilsoni, 121. 

 ^strelata hssitata, 126. 

 After pictures, 83, 318. 

 Agassizia subrotunda, 381. 

 Agelaeus piioeniceus, 117. 

 Ainos, 86. 

 Aix sponsa, 125. 



Alaska; natural history of, 143; glacial 

 action in, 145, 149, loO, 151 ; butterflies 

 of, 404. 

 Allen, J. A. On the birds of Iowa 

 and Illinois, 85; reptiles and batra- 

 chians from the vicinity of Springfield, 

 Mass., 171, 248. 

 Alsinklendron, 164. 

 Alterations of By-Laws, 137. 

 Amblystoma the parent of Siredon, 97. 

 Amblystoma Jeffersonianura, 202. 

 mavortium, 97. 

 opacum, 2(J0, 249. 

 punctatum, 199. 

 tigrinum, 201. 

 American bees, 165. 2a9 ; Crustacea, 274. 

 Ammodramus caudacutus, 115. 

 maritimus, 115. 

 Ammophila gryphus, 98. 

 Araorphopa caiman, 340. 

 Ampelis cedrorurn, 112. 

 Amphibians, vision in, 225. 

 Amphipleura pellucida, 152. 

 Anas boschas, 125. 

 clypeata, 305. 

 obscura, 125. 

 superciliosa, 305. 

 AnoiStrodon contortrix, 179, 249. 



Ancylocheilus subarquata, 122. 

 Anisomorpha buprestoides, 355. 

 Anorthura hyemalis, 108. 

 Anous stolidus, 307. 

 Anser Gambeli, 124. 



hyperboreus, 124. 

 Anthoearis lanceolata, 406. 

 Anthus ludovicianus, 108. 

 Antiquity of man, 398. 

 Anfiteuchusfratermis, 321. 

 Antrostomus carolinensis, 118.. 



vociferus, 118. 

 Apatite in Canada, 88. 

 Ardea exilis, 303. 



herodias, 123. 

 sacra, 303. 

 Ardetta exilis, 123. 

 Ashley River, diatoms from, 362. 

 Astrophyton panamense, 387. 

 Stimpsonii, 388. 

 Astropsammia Pedersenii, 392. 

 Atwood, N. E. On the sperm whale, 

 84; description of Carcharias tigris, 

 268; on the natural history of some 

 edible sea fish, 402. 

 Aulacodiscus oi'eganus, 381. 

 Aythya americana, 125. 

 vallisneria, 125. 



Babirusa alfurus, 217. 



Bacteria, 340. 



Bascanion constrictor, 180. 



Batrachians of Massachusetts, 171, 248. 



Beaver dams in Maine, 137. 



Bees, descriptions of, 165, 269. 



Belonomiis annulaticornis, 324. 



Belostoma annulipes, 326. 



Bernicla brenta, 124. 



canadensis, 124. 

 sandvicensis, 305. 



BiCKMORE. A. S. On birds from Turn, 

 156; on Nautilus pompilius, 157, 216; 

 on mammals from Buru, 217. 



Birds, list of desired species, 15; accom- 

 modation in eyes of, 400. 



Birds of Iowa and Illinois, 85; of S. 

 Carolina, 104; of Buru, 156; of Vera 

 Cruz, 222; of Hawaiian Islands, 294. 



Blabera annigera, 343. 

 cubensis, 342. 

 fe.morata, 342. 



Blake," W. P. Remarks on the Ainos, 

 86. 



Bonasa umbellus. 121. 



Boreus bruraalis, 409. 



