1878.] 65 [Scudder. 
distinctly broadening on the posterior lobe, which is separated from 
the anterior by a considerable depression and a pretty deep sulcus ; 
posterior lobe rather distinctly punctate; median carina, though 
slight, distinct throughout; lateral carinze obscure on the anterior 
lobe, the middle of the anterior half of the lateral lobes tumid just 
below their place; transverse sulci of anterior lobe distinct through- 
out, but not severing the median carina. ‘Tegmina considerably 
longer than the body. Terminal ventral segment of ¢ abdomen 
scoop-shaped, rounded, entire; supraanal plate (so far as can be 
seen on the single specimen in which the parts are somewhat con- 
cealed) semi-ovate, broadly rounded apically, longer than broad; the 
marginal apophyses of the preceding segment slender, aculeate, par- 
allel, approximate, about half as long as the supraanal plate; anal 
cerci moderate in size, compressed, the basal half tapering consider- 
ably, straight, directed backward, the apical half a little incurved, 
nearly equal, enlarging a little apically, and notched at the tip; basal 
tooth of lower valves of the ovipositor of the ? sharp, triangular, as 
long as broad. 
The specimens on which this description is based were collected 
in alcohol, and little can be said of the colors; there is a more or less 
broken black band extending from the eye over the upper part of 
the lateral lobes as far as the posterior transverse sulcus; the hind 
femora may have been faintly banded, the hind tibiz were probably 
red with black spines, and there is a distinct row of fuscous quadrate 
spots down the middle area of the tegmina, especially in the female. 
Length of body, 3, 21 mm., 2, 22 mm.; of antennez, 3, 9 mm., 
?,8 mm.; of tegmina, J, 19 mm., 2, 19 mm.; of hind femora, ¢, 
12.5 mm. 2, 13.5 mm. 1 ¢,1 %. Arizona. Through the kind 
communication of Prof. Cyrus Thomas. 
This insect again has the general.aspect and size of M. femur- 
rubrum (Burm.), but is more nearly allied to the species last de- 
scribed. In the peculiar termination of the anal cerci it somewhat 
resembles the group of heavy bodied Melanopli to which M. femora- 
tus (Burm.) belongs, but there its special -resemblance ceases. 
73. Melanoplus infantilis. One of the smallest, if not the 
smallest, species known. Head rather large, but not elevated, and 
moderately arched. Eyes rather large, moderately prominent ; ver- 
tex between the eyes scarcely broader than the first antennal joint 
(d), or broader than the length of the same (?) ; fastigium deeply 
and roundly (<@), or shallowly and flatly (2), sulcate, the lateral 
PROCEEDINGS B. 8. N. H VOL. XX. 5 JANUARY, 1879. 
