894 Fli^TH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



moths in June and July ; these at once deposit eggs which give the 

 second brood of moths in September. The female lays about fifty eggs, 

 and those observed by Mr. Lintner hatched from April 5 to 30. 



Ugg. — Glossy reddish brown, broadly oval, somewhat flattened upon its attached 

 side, about 0.05 inch long by 0.04 inch broad ; the surface, under a magnifying power 

 of fifty diameters, shows irregular hexagonal reticulations, of which the elevated 

 lines are divided by a fine impressed line. The shell is moderately thick. The larva 

 «ats an opening in one end of sufficient size for its escape, but in some instances a 

 large portion of the shell is subsequently eaten. The eggs laid under my observa- 

 tion have been so covered with the anal hairs of the moth as almost entirely to hide 

 them from sight. Fig. 15 * represents a cluster of them. 



Larva, first stage. — The larva, on emerging from the egg, measures one-tenth of an 

 inch in length, is of a dull green color, with a black dorsal line. The head shown in 

 Fig. 16, enlarged to six diameters, is brown, crossed centrally by a white horizontal 

 line, another shorter one beneath parallel to it, just above the mouth -parts, and two 

 nearly perpendicular ones on the superior front of the head, obsoletely united below 

 by a curved line. Rows of tubercles traverse the body, from which long hairs pro- 

 ceed, of which those of the first segment are longer than the body, and those on 

 the terminal segment are as long as the body. T he legs are long and project later- 

 ally — more conspicuously so when the caterpillar is walking. Twelve of the larvae 

 died during this stage before attaining their first molting. Their greatest length 

 was one-fourth of an inch. This stage was of varying duration, extending from 

 eixteen to thirty-three days. 



Larva, second stage. — The first molting commenced on April 21st, and terminated on 

 the 8th May, extending over seventeen days — a considerable '^less range than that 

 shown in the hatching of the eggs (17:25). The following is the record of the 

 observed meltings : 



Larvffi. 



April 21 2 



April 22 7 



April 23 8 



April 24 5 



April 28 1 



April 29 1 



• Larvae. 



May 2 :5 



May 3 I 



May 5 2 



May 7 2 



M.ay 8 1 



Total 33 



On emerging from its first molt the larva measured 0.3 inch. The frontal lines of 

 the head, before nearly perpendicular and parallel, now converge below, resembling 

 the letter U ; the brown portions, under a lens, show indistinct mottlings (see Fig. 

 17). The body tapers regularly from the first to the last segment. The dorsal line 

 is brown, with pale borders. On the summit of the third segment is a fuscous patch, 

 behind which extending over the incisure, is a pale patch, convex in front and 

 straight behind, bounded by the four tubercles of the fourth segment. On the sev- 

 enth segment is a small pale pptch. The sides of the body are gray, with irregular 

 linings ; a sub-dorsal row of black tubercles bear several long black hairs, beneath 

 which is a dull orange interrupted line. The tubercles of the substigmatal row bear 

 numerous shorter white hairs. 



During their rests from feeding the larvae resort to the stems, where, with flat- 

 tened body pressed to the surface and with head extended, they can scarcely be 

 discovered. 



At the close of this stage, which ranged from seven to eighteen days, the larvse 

 measured one-half an inch in length. 



* Mr. Lintner's figures are not reproduced. 



