JAMES A. G. REHN 
|)('i i|)li(‘i-al mariiin of same but faintly or at most weakly simiato- 
Icthnlate: anterior aAillai'y vein wc'akly inerassate, not fusin}>; witli 
the postj'i’ior axillary vein; all superjacent I'adiatc V('ins ineras- 
sat('. 
( ienotypi'- J . ai rli ti l(iti us [( h di pudu ai rli n iu ua] (d’li(nnas). 
Acrochoreutes earliniatius ( riioiiias) 
lS7n. ( )c\(lii>(iil<i\ riirli/ii(it/<i '^riioinas, Proc. Acad. Xal. Set. I’liila., IS?!), 
]). SI. 16^9; Idisfcrn Colorado.] 
'riu' jj;(‘nus is eomposiMl of oik' specie's, which is <livisil)l(' into 
two well-marked }i:('of;rai)hie races, each oeenpyinjia e()nsideral)le 
territory and I lii'ir inle'rjiiadal ion domonsl rat ed in the materia I 
before ns. ( )f these' rae*e'S, enu' [curli uiuuus curli uiu uus) ise'asle'rn 
anel imrthe'iii, eee'e'iiri'inji in the' nenthe’rn (ii'e'at Plains, imrlhe'in 
Jbee'ky Meenidains anel e'e'iiti'al British ('eelnmbia, while' I he* eel he'r, 
w hie'h is iH'w (curliiiiunus slrcpil us) , is a foi'in eef the' (Ire'al Basin 
anel (be'e'ii Ivive'i- le'i^ions. ddie' are'a e»f inle'rjii’aelation is elis- 
e'usse'd be'leew. 
Acrochoreutes carliiiianus carliniauus (d'lioiiias) (Platen XI, Hjis. 1 lod.) 
\\’(' have take'll material fremi I'eert ('eellins, ( ’eilenaeh), as 
typie'al eif this rae'e'. 
This, t he typie-al sidesjie'e'ie's e»f curl i uiu n us, wlie'ii e'emipai'e'd wit h 
B. curhuiauus slrcpKus, eh'se'ribe'el be'leiw, is e'harae'te'rize'el by 
Inn'iiifi I he' j>;e'ne'i'al feii'in slmrle'r anel preipeirl iemate'ly nmre' reibnst-; 
te'iiinina breiael anel le'ss atte'imale', ])arl ie-nlarly at ajiie'C's; wind’s 
h'ss e'leni'rate anel neit snlifah'ate' elistael, the' alar nlnaraie'a re'l- 
ative'ly narrow, iiei wieler than nu'elian ai'ca at elistal thre'e'-fift hs, 
inle'i'axillaiy are'a eif win^s re'hitive'ly breiael anel snbe'epial in 
wiellh ; e'ye'S preipeirl iemate'ly smalle'r, le'SS preimine'iit wlie'ii se'e'ii 
freim the' elensal and e'e'phalie' aspe'e'Is, anel meire' eiveiid anelle'ss 
e'lliidie'al in basal emlline', the ve'iitral marffin approximate'ly sub- 
anj2;ulate; fastif^ium prenieirtiemale'ly bi'eiader. ddie tifiure's ilhis- 
t rating these remarks present the elifferenees meire e'learly than 
weirels. In the description eif ,-l. carliuianus strepitus we* have 
])res:('nteel an analysis of the eliffercntial features of that race, 
which will aid in the i)roper segregation of the twei tornis. 
Aerochoreutes carliuianus carliuianus is a fe>rni of the higiu'r 
(Ireat Plains region, extending into the Pocky Afemntains, tyjii- 
cal material before us representing localities extending from as 
TK.\.XS. AM. EXT. SOC., XLVII. 
