70) THE ACRIDIIDAE OF, MINNESOTA 
present and in our species wel] developed and at least as long as the 
abdomen. Hind femora long and slender, somewhat compressed, gen- 
erally surpassing the abdomen, the superior carina slight and un- 
armed; first joint of hind tarsi scarcely longer than the third. 
The species are, in general, very closely allied and at times forms 
are taken which are not readily placed. The genus is closely related 
to Hypochlora, but may be distinguished by the ampliation of the base 
of the subgenital of the males. The species are small, trim insects, of 
green color and having much the aspect of Melanoplus. Two species 
are known in Minnesota and a third, which has been doubtfully re- 
ported from our State, may yet be definitely established and is here 
included to aid in identification. 
Metazona never rugulose, sometimes feebly punctulate 
Transverse sulci of pronotum marked in black viridis 
Transverse sulci of pronotum not marked in black or contrasting colors; 
dorsum tectiform pratensis 
Metazona distinctly rugulose; dorsum tectiform Speciosus 
Hesperotettix viridis Thom. 
Hesperotettix viridis appears to have been frequently confused 
with others of the genus. It has been reported from Minnesota by 
Bruner, but Scudder (Revision of American Melanopli, Proc. U. S. 
Natl. Museum, Vol. XX, p. 58) considers this doubtful. Since it does 
occur in Nebraska and in Jowa, it may yet be positively fixed as a mem- 
ber of our fauna and is here included to aid in recognition. 
Hesperotettix pratensis Scudd. 
Hesperotettix pratensis, which is possibly the most beautiful of 
our Acridinae, deserves a complete description, although the illustra- 
tion (Plate I, 7) is as nearly perfect as may be desired. The head 
is green, tingeing to vellowish green in some specimens, punctate 
with fuscous in front, the lower portion of the face more or less 
purplish; a short fuscous bar descends from the eye in both sexes; 
vertex with a rather narrow fuscous stripe, sometimes blackish an- 
teriorly, extending back, ordinarily with a median thread of yellow; 
the fastigium generally discolored and, especially in case of the females, 
reddish. The pronotum slightly increasing in breadth posteriorly and 
with no angle at the middle, yellowish green in some specimens (Min- 
nesota) with a very faintly defined, light-colored line along the lateral 
carinae and extended upon the head, where it follows the upper pos- 
terior margin of the eyes; above the middle of the lateral lobes of the 
prozona is a more or less distinct fuscous, often irregular bar, gener- 
ally darker below and somewhat margined above and below with whit- 
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