Orthoptera in the British Museum. 133 
Genus Hereracris Walk. 
I completely agree with I. Bolivar in his restricted treat- 
ment of this genus (Trab. Mus. Madrid, ser. Zool., N 20, 
pp- 19-20), but it seems to me rather doubtful whether the 
specimens that served Bolivar as types of his (not Serville’s) 
H. herbacea are actually identical with herbacea Serv., 
because Sjéstedt, who examined Stiil’s specimens of 
herbacea, stated (Ark. Zool., viii, 6, p. 24) that the cerci 
of herbacea are “‘an der Spitze ziemlich kurz und breit 
verengt,” while Bolivar’s description says: “cerci 3 
compressi apicem versus sensim attenuati, simuati, apice 
acutiusculi.” A comparison of these two descriptions 
and Stil’s diagnosis of herbacea: “cercorum maris ad 
P. charpentiert appropinquat,” show clearly that Boli- 
var’s specimens: are not Stiil’s herbacea, though it is quite 
possible that the latter is not identical with herbacea 
Serv., which is described from the female only; and the 
females in this genus are extremely alike each other. If 
we accept Stil’s description and his male specimens as 
true herbacea Serv., then Bolivar’s diagnosis of this genus 
ought to be slightly altered in so far as it is based upon 
the form of the male cerci. In fact, it seems that a definite 
separation line between Thisoicetrus and Heteracris (in 
Bolivar’s meaning) can hardly be drawn, since the other 
very important character of Heteracris—the relative short- 
ness of metazone of the pronotum—is to be seen in Thisot- 
cetrus attenuatus Uvar. (see above), in which the cerci are 
rounded apically. Still I think it useful to retain the 
genus Heteracris for the present, but its full revision, based 
upon type specimens and ample new material, is extremely 
necessary. 
The number of species of this genus is very small; of 
the numerous Walker’s species described under this genus, 
none but herbacea (nec Serv.) belongs here;' Walker named 
three different species as herbacea, two of them being 
described below as new. Acridium herbaceuwm Serv., which 
belongs here, might be identical with speciosa Sjést., but 
must be regarded for the present as distinct, the total 
number of species being thus four; three of them are 
represented in the Museum collection. 
1. Heteracris speciosa (Sjést.). 
1870. Heteracris herbacea Walker (nec Serv.), Cat. Derm. 
Salt. B.M., iv, p. 656, no. 3 (partim?). 
