82 SQUASH-BUG FAMILY. 
The sub-family Alydina also contains some very common 
bugs. They are of a moderately narrow form, with a sub-conical 
head contracted behind the eyes, the last joint of the feelers 
thickened, and the hind pair of femora enlarged towards the tip, 
and armed beneath with unequal spines. 
Alydus eurinus Say, is very common, and is found late in 
autumn and early in spring running over wooden sidewalks. It 
is of a rather uniform dark brown dotted with minute darker 
specks; others equally abundant, are A. 5-spinosus Say, shown in 
Fig. 74, which is much lighter in color, with reddish legs; A. pluto 
Uhler is black. All have similar habits, and none are injurious, 
feeding mainly on animal food. 
The sub-family Anisoscelaria contains moderately and even 
very large bugs, some of which are decidedly injurious. 
al 
c 
LLa/ d 
Fic. 75.—Anasa tristis DeG.: a, mature female; b, side view of head, showing 
beak; c, abdominal segments of male; d, same of female;—a, twice natural 
size; b, c. d, slightly more enlarged. After Chittenden, Div. of Entomology, 
Dep of Agriculture. 
Anasa tristis De Geer. (The Squash-bug). 
This is only too well known as one of the most annoying 
of the many pests of the kitchen gardens, and wherever members 
of the cucumber family of plants are grown upon a large scale 
for the market, this insect is apt to cause much trouble. At 
present it is not common in Minnesota, but seems to be on the 
increase, hence it is wise to be prepared for it. 
In bulletin 19 of the Division of Entomology, Department 
of Agriculture, Mr. Chittenden has written a full and illustrated 
account of this insect, which is shown in all stages in Fig. 75. 
