178 XORTH AMERICAN OEDIPODINAE (ORTHOPTERA! ACRIDIDAE) 
CJroup and (5) the Shastanus Group. The first of these contains 
solely C. undulatus (Thomas), while the fourth is made up of the 
single species thalassinus Saussure. The Shastanus Group is 
composed of two species, shastcrnus Bruner and splendidus Rehn 
and Hebard, the exact relationshii) of which species is under in- 
vestigation. The Ralnda Group is more complex and is treated 
in detail below, where also we have given a section on the Cro- 
talum Group, (^uite a few of the species which have been re- 
feri'ed to the genus Circotettix we now know do not belong to 
that genus, but their exact affinities are not easily determined, 
and investigations along these lines are now in progress. 
The Identity of Oedipoda undulata Thomas, Genotype of the Genus 
Circotettix 
In the collection of the United States National (Museum there 
is a female specimen labelled “Oedipoda undulata. Gol.Terr. 
Type.” This individual has been dried from alcohol and it is 
tyiie numbei' 1088 U. S. N. jM. There is every reason to believe 
this is one of the original specimens and in all probability the only 
one extant. Fully agreeing Muth the ilescription as it does, its 
s(‘lection as the lectotype of the species is thoroughly justified. 
Thomas gave no indication of the number of specimens examined 
by him, although he supplied measurements of both sexes. This 
si)ecimen shows that the following synonymy is necessary. 
Circotettix undulatus (Thomas) 
1872. ()e\dii)0(l(i] loididata Thomas, Ann. Itej). U. S. Geol. Surv.,v, p. 4()0. 
[cf 9 ; “Colorado ami Wyoming east of the mountains.”] 
1888. ('[ircolcttix] lobatux Saussure, Addit. Prodr. Oedii)od., p. 6.'), ])1. fig. o. 
! 9 ; Colorado.] 
18!)(). ('ircotcttix la pidkolus Hruner, Proc. U. S. Xat. Mus., xii, p. 7o. [c? 9 
(Salmon River Mountains west of) Salmon City, Idaho.] 
]!)()(). Cim>h'/(t.c //a;fu,s'.sia»..s' Scudder, Psyche, ix, p. 188. (Not of Sau.ssure.) 
The synonymy of loljotus and lajndicolus was correctly made 
by Scudd('r.* Tlu' tyjie material of lapidicolus^ is now before us, 
from lh(' Ib'bard Golh'ction, and tlu' synonymy is beyond (pies- 
liom Saussure' ’s ('la'ction of [olxttus was in evc'ry i)robability 
diic'lo Scudder’s wrong iidc'rpre'tation of undulidus, whi(‘h has 
b(‘(>ii uidversally followed. Saussure' had the' twee s])e'e*ie's befe)re' 
" Psyche, IX, p. |;{S, (lilOO). 
“See Rcim and ll(‘l)ard, l*roc. .\cad. Xat. Sci. Phila., 1012, p. (>(», (1012). 
