564 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
prepupal larvae within their cocoons, and transformation to the pupal 
and adult stages takes place in the spring or early in the summer. 
For control see pages 55 and 54. 
There are only a few species in the genus 777chiosoma, and T. tri- 
angulum Kby. is probably the most common one found in the Eastern 
States. The full-grown larva is about 114 inches in length, the head 
is creamy white. and the body is greenish white with the eye spots 
and spiracles blackish. It is solitary and feeds on birch, wild cherry, 
poplar, and willow. The life cycle is very similar to that of Cimbex 
americana. 
The honeysuckle sawfly (Zaraca inflata Nort.) is probably the most 
common species of its genus in the Northeastern States. The larvae 
feed on honeysuckle and oc- 
casionally become locally 
abundant, causing complete 
defoliation of groups of 
bushes. The full- -grown 
larva is rather plump and 
about 1 inch in length, the 
head is brown with the face 
and mouth parts lighter, the 
body is grayish green’ and 
marked with yellowish spots 
anc irregular rows of black 
dots (fig. 155). This spe- 
cies has one generation an- 
nually. The winter is 
: passed as prepupal larvae in 
ees sake = 32224 cocoons in the ground, the 
Larvae of Zaraea inflata, dorsal 2dults emerge in May or 
and lateral views. early in June, and the larvae 
usually attain full growth 
late in June or early in July, although in its northern range the larvae 
may not become full grown until August. 
FIGURE 155. 
Famiry TENTHREDINIDAE 
In the adults of the Tenthredinidae the antennae have 7 to 10 seg- 
ments, ranging in shape from setaceous and filiform to clavate. The 
mesothorax is without sterno-pleural sutures, the anterior margin of 
the scutellum is V-shaped, and the posterior margin usually has a dis- 
tinct post-tergite. The tibiae are without preapical spurs, and the 
apical spurs of the front tibiae (except In some Nematinae) have the 
longer spur cleft at the apex (Ross, 367). 
The larvae are leaf feeders, leaf miners, or fruit borers. They range 
from 24 inch to about 114 inches in length, and are usually largest in 
diameter at the thorax. The body is greenish or variously colored, 
with or without distinct markings, and is smooth, glabrous. setiferous, 
tuberculate, or spinous. Yuasa (439) published a monograph on the 
larval characters of this family. with a key to the subfamilies. 
SUBFAMILY PHYLLOTOMINAE 
The pear slug (Ca/iroa cerasi (L.)) is nearly 14 inch in length when 
full grown and has a clean yellow skin (fig. 156). Prior to the last 
