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 coktrational details. The species appears to be quite as hand- 

 some in immaturity as is the adult form. 



Prof. Kiley 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 Report of the U. S. 

 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 different ialis and (Edi2)oda phanwcoptera, 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. 



Fig. 21. — ScMstocerca americana, fourth stage — natural size (original). 



The different stages collected by Mr. Coquillett and sent in by Mr. 

 Moomaw may be described briefly as follows : 



First stage. — No trace of wing-pads; antenna; thirteen-jointed, the eighth joint 

 noticeably longer than either of the others; color, nearly a uniform wine red. 

 Length, 10 """. 



Second stage. — Wing-pads are indicated, but the posterior pair scarcely encroach 

 on the following segment of the body; antennje seventeen-joiuted, the third joint 

 slightly longer than any of the others; colors, yellowish-gray, mottled with black- 

 ishj 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, 

 includiug the wing-pads, also two black spots on each hind femur, the apex of the 

 latter, base of each hind tibia and the antenn;^, black. Length, 12 """. 



Third stage. — Wing-pads distinct, projecting obliquely doivmvard 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 """. 



Fourth stage. — Wing-pads of a considerable size, projecting obliquely upivard 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 """. 



