8 BULLETIN 352, U. S. DEPARTMENT OF AGRICULTURE. 
Second instar.—Immediately after the first molt the second instar is about 3 mm. 
long, and at full growth 4.5mm. long. The head is 0.57 mm. and the ninth abdominal 
segment 0.5 mm. broad. (Fig 6, 0.) 
Third instar.—The newly molted larva of the third instar is 4.5 mm. long with the 
head 0.78 mm. and the ninth segment 0.7 mm. broad. At full growth (fig. 4) it is 
7mm. long and the measurements of head and caudal seg- 
ment are unchanged. (Fig. 6, c.) 
THE PUPA. 
The pupa (fig. 7) is slightly less than 5 mm. long, bright 
y §. yellow, and with a pair of strong curved spines at the apex 
A SS of the abdomen. The prothorax has the concavity charac- 
Fic. 5.—The cherry leaf- teristic of all stages of the species. The head has a curved 
bectle: Eighthandninth row of four bristles above, the concave side of the curve to 
SOD EEL segments,lat- the front. On the pronotum are two rows of four bristles 
ae ta as each, the anterior one curved to the front and the posterior one 
canal used as auxiliary to the rear, and in addition a long bristle on each lateral 
organ of locomotion. angle and two near the posterior edge. The scutellum and 
Much enlarged. (Origit setanotum each have a nearly straight row of four bristles. 
ge) Each of the abdominal segments, except the last, has a pair of 
small bristles near the middle, and a single long bristle at each lateral angle. Each 
femur has a pair of apical bristles. The spiracles of the first five abdominal seg- 
ments and of the mesothorax are conspicuous from their black color; the outer ends 
Fic. 6.—The cherry leaf-beetle: Larval heads and caudal segments, showing proportional size in the 
three instars: a, First instar; b, second instar; c, third instar. Greatly enlarged. (Original.) 
of the trachez show black through the body wall for a short distance. The spiracles 
of the sixth and seventh segments are paler. 
) THE ADULT. 
The adult beetle is rather oval in shape, about one-sixth of an inch 
long by about one-half as broad, and somewhat flattened. . It is dull 
red with black legs and antenne. 
As Le Conte’s original description of the species is in Latin, the 
description given by Horn (1893) is quoted below: 
G. cavicollis Lec., Proc. Acad. 1865, p. 216. Oval, narrower in front, subdepressed ; 
color dull red, slightly shining, very sparsely finely pubescent. Antenne entirely 
