JAMES A. G. REHN 
191 
crotalutn, ])ut this tendency is, apparently, not sufficient to 
indicate intergindation, although a representation from more 
localities in northern and northeastern Arizona may show such 
to be the case. Further collecting in that region must l)e done 
to cleai’ly detei'inine this matter. 
The species inhabits open park-like areas scattered through 
forests of western yellow pine (I^inus ponderom) in northei'ii 
Arizona. Its clattei-ing is very decided. 
Specimens^ Exdrnincd: 09; 27 cf , ‘t2 9 . 
Akizona: Bright Aiigt'l, Gnuid Canyon of the Colorado, Coconino County, 
7000 feet, IX, 11, 1907, (Ilehard), .‘jcf, o 9 , IHebard Cln. and A. X. S. : 
0880 feet, \'1I, 29 to VIII, 2, 1900, (P. P. Calvert; on rim of canyon), 3c?', 
2 9 , I.A. X. S. P.]: X, 0, 1919, (Ilebard; in open park-like yellow j)ine forest in 
shallow valley back from edge of canyon), Icf, 2 9 : VII. 11, 190.5, (11. ,Skin- 
ner), 1 cf, |.\. X. 8. P.]. San Francisco Mountains, Coconino County, 9000 
feet, VII, 31, 1919, (R. A II.; in bare spots at u|)per limit of j’ellow jhne for- 
est), 1 c?, 19. Flagstaff, Coconino County, \’II, 3, Icf, [Hebard Cln.]. 
Bill tt'illiams Mountain, Coconino County, IX, 14, 1917, (U. C. Poling), 
15 c?, 21 9 , tijpt', ullotypc and pdnitypes, lllebard Cln. and A.X.S.P.] Dtnvey, 
Yavajjai Count\^, IX, 9, 1917, (O. C. Poling), Id', [Hebard Cln.]. 
Circotettix crotalum-- new species (Plate XII, figs. IG t(j IS.) 
We liave discussed above the general relationship of this sjie- 
cies, and specific comparison here need l)e made only with C. 
cocunino, described above, and C. shastanu.s Brunei'. From co- 
cunino the iii'esent six'cies differs in its more slemh'r and elongate 
foi'in, narrower fastigium, slightly nior(' angulate fastigio-facial 
angle, slightly less prominent eyes, more elongate' tegmina, with 
narrower anal field, more elongate and apically falcate wings, 
ami the avei'age greater develoi)m('nt of the first, se'cond and 
third superjacent radials of the wing. The caudal femora also 
average more robust. From shdstanus the itresent. spe'cie's differs 
In addition to these specimens we have three males labelled “Albu(|uer- 
que, X. Mex. 7-12-02. Oslar” (recorded as Circul tlix undulntus by Ri'lm, 
Proc. .Acad. Xat. >Sci. Phila., 1904, p. .509, (lt)04l). These are clearly coconino, 
prtjbaldy from .some Ijoint in north-central .Arizona, but certaiid}' from no- 
where near .AlbiKiiKU'ciue, X(nv Alexico. .At the previous wi'iting .AlbiKpier- 
que was (pieried as the exact locality, but it is evident the locality is more 
erroneous than at first suppost'd. 
Recorded l)y R(4in and Hebard (Pioc. .Acad. Xat. Sci Phila., 1908, 
p. 391, (1908)) as Circulcltix undulatus. 
I. e. a ca>it(i7iet. 
TKAXS. AM. EXT. SOC., XI.VII. 
