222 
far as we know, have not been described. We therefore take the oppor- 
tunity of presenting careful drawings of the five different stages and 
present color ational details. The species appears to be quite as hand- 
some in immaturity as is the adult form. 
Prof. Eiley seems to have studied this species in captivity and to 
have observed the laying of eggs and hatching, since he gives certain 
details concerning these processes in the First Eeport of the U. S e 
Entomological Commission. For instance, he says (p. 221) that from 
mature insects captured June 14 the eggs were deposited June 24, 
and (p. 226) that the eggs are irregularly arranged, as is the case with 
Caloptenus differentialis and (Edipoda phancecoptera y and that in this 
species the cement which binds the eggs together is more copious than 
in the others. The number of eggs he states (p. 228) to be about 120, 
and (p. 232) that they hatch in rather more than a month, while it is 
said (p. 237) that the average period between hatching and maturity is 
70 days. This would bring the adults out at St. Louis about Sep- 
tember 1. 
The different stages collected by Mr. Ooquillett and sent in by Mr. 
Moomaw may be described briefly as follows : 
First stage. — No trace of wing-pads; antennae thirteen-jointed, the eighth joint 
noticeably louger than either of the others; color, nearly a uniform wine red. 
Length, 10 mm . 
Second stage. — Wing-pads are indicated, but the posterior pair scarcely encroach 
on the following segment of the body; antennas seventeen-jomted, the third joint 
slightly longer than any of the others; colors, yellowish-gray, mottled with black- 
ish, a black streak beneath each eye, a black dorsal stripe extending the entire 
length of the head and body, an indefinite black spot on each side of the thorax, 
including the wing-pads, also two black spots on each hind femur, the apex of the 
latter, base of each hind tibia and the antennae, black. Length, 12 nim . 
Third stage. — Wing-pads distinct, projecting obliquely downward and backward, 
the posterior pair encroaching upon but not attaining the middle of the segment 
back of them; antennae from twenty to twenty -two jointed ; colors and markings as 
in the preceding stage, except that the ground color is extremely variable in the 
different individuals, ranging all the way from a yellowish-gray through grayish- 
yellow, bright yellow, greenish-yellow to bright green; those of a green color 
usually have the black markings very faint. Length, 18 mm . 
Fourth stage. — Wing-pads of a considerable size, projecting obliquely upward and 
backward, the tips of the posterior pair nearly reaching the hind margin of the suc- 
ceeding segment; antennae twenty-five'-jointed; color and markings as in the pre- 
ceding stage. Length, 28 mm . 
Fig. 21. —Schistocerca americana, fourth stage— natural size (original). 
