A. 
Page. 
Actiturus bartramius...... sei eerie een ceed 87 
Aigialitis montanus . 0.2... 2 ee cece ee eee ee cones 86 
VOCHCTUS = whu.c ees) Sieiaenie aja eal dels dew cane 85, 92 
Agelaus phoeniceus ... 2.2.22. cece ee nee cen ne eee 78 
AlONAIAG ieee wiser eo ele siengigus sag Sac disa teed owen 74 
Albee QMOHCOAE esc. o oc dcccee wnelsceceresiqceed suse ence 69, 91 
ACCU 2s asc waren ta aeamaratemaecadinatvaaieniereses 80 
Alcedo aloyon...-- 2.2 20--.acc00 vencee vaca ce ccceoas 80 
Alkaline deposits ...-.. 22-22... e ee eee e eee eee 99 
Alluvial clays ...-2. 2. 2-20. eens cece cee Bees 97 
Alluvial deposits .......2.. ..0..022 202-222 eee eee 97 
Alum Creek 2... 222. eee ee eee eee ee eee eee 23, 62 
American Fork, (Musselshell). ........-..--------- 57 
American Lanner Falcon. ..--...--.-.---------+-- 82 
American Widgeon ......-.....---2--2- 0220-2 -2e- 88 
Amethyst Mountain.......--.-. 2-2. ---. 22-2 ------ 30 
AMMONUES TAU boa rra spins sisis Geis Week akecewanees 101 
AMPCNAG coc ocs% cecescasyweseSeweeeweaseus soawes = 76 
Ampelis cedrorum ..--. 22222-2220 s2-06 ges Seeieetsaets os 76 
GOT ULUS a soicigad ees ise suey een ae ued eute vices 76 
Analysis: Of alkalii:s...c4: isccce sen gece se sepetin sos. 100 
Anas DOSsChas, dsici oc cesieeesis ase eGe ashe seecsecie 88 
ARGUED) sinjzcesteiecie's. Usps see ec oredss Week tide wanes 88 
AN CHUG. snc ioe's os Hae wees, Roe a eee ees Saeasameciaes 101 
Anser hyperboreus ..2 22... -2ee wee cee eee e eens 88, 92 
Antelop@scssesceea seed wactan Wert peeseseens aos 70 
Anthus Ludovicianus 1... 0.200026 022 eee ee eee cee nee 74,91 
Antilocapr a americana .... 22.220 --- 262 eens eee 70, 91 
Appearance of country near Carroll.........------ 100 
Aquila chrysaétos -... 2.22 022-20 ee eee eee eee eee ee 83 
Archibuteo ferrugineus ..--.. Saisie adie teisigiee ame ies 83 
lagopus sancti-johannis ...--.-.---+------ 83, 92 
Architectural Geyser...-.. 22.22. -----2 eee eee ees 131 
Arctic Bluebird... ...-....-----------+ eevee e eee ee 73 
Arctic Towhee. ..-... 2-2-2. 22-2 cee n ne cee ene cece 78 
Arctomys flaviventer ..---.--.- ---+-----+--- Saiiciciees 67,91 
Ardea Herodias..... .---+- ---- 222+ wen e eee cee eee 87 
ATOGAE? sees ns Se odes sdistione Hatlnae asst Sak aoe 87 
Argillitic slate..-.....--.------- ee 22 eee eee eee 113 
Arionellus tri-punctatus ..2. 1-0-2 2-20 -0e see ceases 117, 141 
Arkansas Flycatcher. .......--. -------+ +--+ +--+ 80 
Armes CiGe. coonaw sexe cceseeawes eo Ma ea aew ae 33, 79 
Arrow (Creek ccccansccewsvieaws teeeescews veeracais 124 
AMOMAG 2. cctcsacece sans boas toes Heke sees ravacine 100 
Arvicola riparia ....2. 0-22-0222 nee cee eee eee eee 68, 91 
ARSIN ADONIS 6 2c. sca 'e sissecioes oid oeerdeeumece Recess 11, 64 
Astronomical observations .....-..--..----------- 38-52 
Athyris....-..------- 2 geal bette hie ek oh obhaisars eo SS 113, 121, 133 
planosulcata ...--..----- 22-0 eee e ee eee eee 121 
subtilita ....-6 Goce eo eaesicraaa sau iaee 121 
Audubon’s Warbler......---. 0-2. ---- 2-0-0 eeee ee 74 
Aulopora .....---0----- +205 aaa darrian istete Sawasdee odD 
ANOCOE wea a sacs eae eee cate ce cee se ewce Sele woe ve eae 86 
B. 
Page. 
Baculites ovatus 2.2.2. .- 2000 cnee cone ceceeenencee 101, 126 
Bad Ger soci ctehie nsw eda) tsceseagmer wee semeatence 66 
Bad Lands pee susiesctactentais dace cedbewaesseunacaes 13, 73 
Baird’s Sandpiper... ....--2- 02-220 cece cee ee cane 86 
Baker) Camp: .<cciss nosch cas cece we heenseeeas 67, 69, 74, 114 
Baker Dako Basitt:<:c25 cc ueenee speeweace wedizemase 116 
Bald Butte-cssccswcwec wid eee tne ken seas weeeanige wees 107 
Bank Swallowesaccssnnst see se sapndee ess ceedeses 75 
Barn: Swallow ssccsacose ossevews ve eeassekuemes des 75 
Bartramian Sandpiper ...-....-.--- seesuelewals cues 87 
Bay ya Riccmcersdeud s sammie ececdeaseanae canons es 63 
Bay-winged Bunting.....-....0-2.---2 2-2-2. 22-2 77 
Bear; Black wesc essed ers spec eedee weeny 2 Weielsios xe 66 
Cinn am Onas.ate s suscie eedeseedseeesee cess ne 66 
Grigzly sceeeckaeecscs nase dese te Seti ceis otk 66 
Bear’s Paw Mountains ....-....-.-2-.-.---+----- 55 
Beavers arc icicisudi chelate cons siteyy version seclaiatiiisewistoicetie 67 
Creeltscn: seec ceseoseceees sou vee wees esses 57 
Beehive Geyser sass. vesveesces case sees cane sesees 26, 131 
Benson's Merry uc s sax sce ns /seasewaees wees voce eee 57 
Benton; Fort: << ssas eoseceeeexesaauacce eisesee daee 9,12 
Berthold) Mort rosecher vesscaul naira was cxocetiees 11,71 
Big Belt Mountains.......-.. Savelieve’oie's's en tee eee. 114 
Biko Creel wc.22 coe eeaicacinaircse srs clean seeheuss 57 
Spring Creek ........ Scsderse Boizlestele a tbls see ieee 14, 107 
Timber Creche ccs creu- soins copie se soem ode atetdss 57 
Bighorn. sszeho seb orks cectnsers! stsees 5 sie sven ese 70 
BirdsSsass gaced 2 2 het oscars leeeyst erdisieiees elem ose 72 
Bismarck; Dako --.o25:ccisja-asied ae eosesie Gene tecens 11, 32 
BiSOD; sissre ge we eee vice caterers see ees eaem deed Vek 71 
Bitter Root Mountains.....-....-.-..-.---------- 120 
Black Bear sjaiee sccessnseslccaige gee sinieoonien ese gece 66 
Butte: sajeesieacdisivai se sace viscose ase sees 106 
Black Hills, Dakota. ...-..-.-..----.-----------5- 85 
Black-billed Cuckoo ....-.--------- +--+ ---0.----- 80 
Blackbird, White-winged........--.-----.-------- 78 
Red-win ged yiccici seit pen cien aesiee cc eine 73 
Black breasted Woodpecker.....-..----.----.---- 80 
Blackhead, Lesser ..-.-..---2-- ---+ 2-20-22 eee 89 
Black-tailed Deer. ..--..--.-...--- 202 -------- =e 70 
Creek. csc wc eaee see seeteseeans 19 
Black-throated Bunting. ..--....---.------ +--+. 73 
Bluebird, Arctic ...--. .----- eee ene eee eee eee 3 
Woestern .. ..2.. ence terske weeklies vera meas 73 
Blue Grouse ..- 24. 2.222. ee eee eee eee cee cee eee 84 
Blue Heron, Great .....--..----.-------. eee ee eee 87 
Blue-headed Grakle....-. --..-----+ ---- +--+ +--+ 78 
Blue-winged Teal ......---------+-- -02- ++ 22-2 +--+ 89 
Bobolink ..-. .. 22. ----00 cee cee cere eee eee ee eee 78 
Bohemian Waxwing ..---..----- -----. eee eee eee - 76 
Bonasa umbellus umbelloides -..---.----- ssi eeeie ea 85, 92 
Bos americanus ..-.--- +++ 2-20 eee e ee eee piaeeteasns 71, 91 
Bottler’s ranch ..-...-..------+----+--0+- beeawesicais 17 
