35 
of a book; the tip of the abdomen is exposed, the wing-cases not com¬ 
ing down behind to cover it. The claws of the feet are notched or 
split at the tip like the point of a pen; and the joints of the feet are 
long. It is covered with buff-colored scales which give it a yellowish 
brown color, but if these are rubbed off, the head, thorax and under¬ 
side will appear black and the wing-cases brown. The larvae are 
grubs, which, when not feeding, lie with the body curved. They reach 
full size in autumn, when they are about three-quarters of an inch 
long and about an eighth of an inch in diameter; of a yellowish- 
white color, with a tinge of blue toward the hinder extremity, which 
is thick and obtuse ; they have three short legs situated on the first 
three segments behind the head. They reside in the ground, feeding 
on the tender roots of plants. 
It is in the beetle state they prove most injurious, eating the blos¬ 
soms and leaves of shrubs, trees and other plants. When very abun¬ 
dant they occasionally extend their operations to corn. Bui this is 
not habitual with them, and, so far as lean ascertain, no complaint 
in this respect has ever been made against them in Illinois. 
GRASSHOPPERS OR LOCUSTS. 
As but one species of these insects—the Rocky Mountain Locust 
(Caloptenus spretus), which has so far not visited our State—is known 
to be very injurious to corn, I have no occasion to enter into a gener¬ 
al account of our species at this time. 
In my former report I gave a short ac¬ 
count of the depredations and habits of 
this western species; much has also ap- 
fig. 4 . Caloptenus spretus, Female, pearecl in the papers and other periodi¬ 
cals in reference to it, and before this is printed an exhaustive account 
of its history and habits, and a full state¬ 
ment of all that is known in reference to 
it, will be given to the public by the Unit¬ 
ed States Entomological Commission. 
For the benefit of our agriculturists I _ 
give here a full description of this species IG emaiet L0PTENUS Femurrubrum * 
as compared with the two closely allied species (C. atlanis ) and (C. 
femur-rubrum .) 
It is therefore unnecessary for me to take up the 
subject at this time, except to give such descrip¬ 
tions and illustrations as will en¬ 
able the farmers of Illinois to 
distinguish our closely allied na¬ 
tive species—the common Red- 
Legged Locust ( Caloptenus femur- Fig. 6. Tip of the male ab- 
Fig. 7. Tip of male abdo-rw6rwm) and Lesser Locust (Cal- eralv^ewonheTermirfal 
Z e TihliTZSKiSi^e'!^ nm atlanis)—(rom the migrat- 
Qf terminal eoerment • r 
as in Fig. 6. ing and more destructive west¬ 
ern species (Caloptenus spretus.) 
terminal segment; c 
upper side of same. 
