13 
frontalis is inclined to be a little particular, jusl as are a Dumber of 
other species of our North American insects belonging to this family; 
but its tastes can not be considered refilled when it is known thai chief 
on its bill of tare comes the wild Sunflowers so common throughout that 
portion of the Wesl to which the insect is characteristic. It also seems 
to relish the Sorghum plant, which latter is entirely ignored by the 
Rocky .Mountain Locust. 
This locust can be recognized by the following description : 
Wrtr\- subconicaL small size. Tegmina and wings Dot passing th<- abdomen. 
General color, green. 
Closely allied to A. tunilineatum Walk.: caloptenoid io general appearance. Ver- 
tex regularly hexagonal, standing out in tin- form of a very short, truncated cone, 
the rip depressed in the center: face >lightlv oblique, straight, qnadricarinate ; <ar- 
iiue nearly parallel, the middle pair approaching each other immediately below the 
ocellus. Eye- elongate, oblique, straight in front. Pronotnm scarcely enlarged be- 
hind : anterior lobes reticnlately, and posterior lobe longitudinally, rngnlose; median 
carina very distinct. Tegmina and wings narrow, rather shorter than the abdomen. 
Valves of the ovipositor prominent, lower pair much slenderer than the npper pair. 
and much exserted. Male cerci slender, tapering, and turned up : snbanal plate last 
ventral segment) narrow, tapering: snbtrnncate at the apex, entire. Prosternal 
spine snbqnadrate, pointed, and straight. Antennas passing the prouotuin slightly. 
Posterior femora passing the abdomen. 
Nearly uniform grass green. Face and pronotnm sprinkled with dusky dots. The 
elevated line- of the pronotumpale yellow, more or less tinged with red. The upper 
edges of the posterior femora also more or less tinged with red. Antenna-, orange 
color. Tegmina somewhat lighter green than body: transparent. Wings, pellucid. 
Length of body — female. 1.06 inches; male. 0.82 inch. Length of tegmina — female. 
0.63 inch; male. 0.5 inch. 
Although frontalis is found as far north as Bismarck, N. Dak., it is 
essentially a southern insect. Especially is this true with respect to 
its presence in destructive numbers. It is a common species in Ne- 
braska in certain localities, is found in eastern Wyoming rarely, and in 
eastern Colorado and northeastern New Mexico more frequently, while 
in Kansas and southward it becomes quite numerous, especially upon 
rolling, more <>r less sandy soil. To the eastward it reaches into west- 
ern Iowa ami central .Missouri. 
We have several other species of these large Acridians within the 
limits of the United States, all of which occasionally show a tendency 
toward uncommon multiplication. 
These are Acridium appendiculatum, A. rubiginosum, a. alutaceum^ 
A.obscurum, A. unit incut km. -awi] A.albolineatum. The Schu ■ vaga 
also should be included among the latter species. All of these insects 
are arboreal in their habits, and live the greater portion of their lives 
above ground in wooded districts, and on this account are rather hard 
to deal with. 
