19 
The description of this locust, as given by Mr. Scudder, is ae follows: 
Brownish fuscous with more or less of ;i cinereous tint. Front of head livid, very 
heavily mottled with dark brown; mouth parts pale, the tip of last palpal joint black, 
antenna' pale at base, beyond dull reddish more or less tinged with yellow, toward 
the tip infuscated. A slender blackish stripe passes from behind the eyes to the 
hind lobe of pronotum, sometimes interrupted, sometimes accompanied by an infus- 
cation beneath, broadening the band; upper surface more or less decked with dark 
brown, sometimes collected into a V-shaped catch opening forward, the apex at the 
middle of the posterior lobe; hind border dotted with blackish ; posterior lobe pro- 
fusely, rest of upper surface sparsely, all shallowly, punctate: sides of metathorax 
with a pale oblique stripe narrowing upward to a point; tegniina blackish or brown- 
ish fuscous, flecked rather distantly with brownish spots, relieved by similar pale 
ones along the middle; legs of the color of the under surface, the fore and middle 
femora a little deeper or duskier; hind femora broadly bifasciate with blackish, the 
apex black at the sides; hind tibia- and tarsi yellow, occasionally tinged with red, 
paler next the base, with a black annulus; spines black. Vertex broader ( $ ) or 
much broader ( 9 ) than the tirst antennal joint, the fastigium with a scarcely per- 
ceptible depression ( 9 ) or slightly sulcate ( $ ), broadening in front; frontal ridge 
broad, nearly equal, a little sulcate below the ocellus. Median carina of pronotum 
slight, distinct only on the posterior and anterior lobe, cut by all the transverse fur- 
rows; lateral carinas rather distinct, rounded. Last abdominal segment of the male 
a little produced, rounded; cerci very large and stout, compressed, broadening api- 
cally, well rounded, very similar to those of IT. ponderosus, but not so broad at the 
tip. 
Length of body — male, 29.5" im ; female, 34.5 mm ; of tegmina— male, 21 mm ; female. 
24 mm ; of antenna? — male, 13.5 mm ; female, 15 mm ; of hind femora — male, 17.6 mm ; fe- 
male, 21 mm . 
Melanoplus robustus is also quite closely related to the insect described 
by Prof. Cyrus Thomas as Pezotetti.r viola, which occurs in Illinois, Indi- 
ana, and Missouri. It is also related to Melanoplus ponderosus Scudd., 
of central Texas. 
THE TWO-STRIPED LOCUST. 
(Melanoplus bivittatus Say.) 
Perhaps the most familiar locust to the greatest number of people in 
the United States is the one shown in Fi#. 8, unless it should be the 
ordinary Carolina Locust, Bisso- 
steira Carolina. Although the 
illustration is a pretty fair rep- 
resentation of this insect, the fol- 
lowing description is inserted for 
the benefit of those who wish to 
see it : 
Fig. S.—Mclanojilia: bivittatus— natural siae (after 
Riley). 
In this very common species the 
vertex of the female is convex or but 
slightly depressed, and the frontal costs not sulcate; in the male the frontal costs is 
more or less distinctly sulcate. Tegmina and wings hut little longer than the abdo- 
men. The last ventral segment of the male has the apical margin entire and circular. 
Pronotum with the sides straight, very slightly expanding posteriorly; posterior 
cross-iueioion distinct ; posterior femora equal to or passing the abdomen. 
