REPORT OF THE STATE ENTOMOLOGIST I91O 63 



There should be no difficulty in distinguishing this species from 

 the brown tail moth mentioned above. The parent insect is a rather 

 slender-bodied, usually snow-white moth (pi. 21, fig. 2) having 

 a wing spread of about one and one-half inches, the female being 

 a little larger. It is decidedly more slender than the brown tail 

 moth and the latter, though flying at about the same time, may be 

 instantly recognized by the characteristic bright reddish brown tuft 

 on the tip of its abdomen. 



The eggs of the snow-white linden moth are deposited in irregular 

 masses (pi. 21, fig. i) about half an inch in diameter, each con- 

 taining from 50 to over 100 eggs. The individual eggs lay at an 

 oblique angle to the supporting surface, are about i mm. in length, 

 barrel-shaped, light brown and with a conspicuous salmon-colored 

 ring at the extremity. 



The full-grown caterpillar has a length of about two inches. 

 The head is a dull reddish or yellowish brown, distinctly broader 

 anteriorly, the clypeus sunken, yellowish brown, the labrum pale 

 yellowish with a few conspicuous yellowish setae, while the antennae 

 are short, the basal segment yellowish, the second segment pro- 

 longed, reddish yellow, narrowly yellowish at the extremities and 

 with a few coarse setae apically. The mandibles are reddish brown, 

 fuscous apically and irregularly bidentate ; labial palpi triarticulate, 

 mostly pale yellowish; spinneret concolorous. The thoracic shield 

 is darker than the head and distinctly fuscous along the margins. 

 The body is mostly a dull brownish black, the anal plate and the 

 anal prolegs being yellowish brov/n. There are irregular, yellowish 

 markings along the sublateral lines, they being represented by incon- 

 spicuous dots on the second and third thoracic segments. These 

 markings are so thick on the first abdominal segment of some speci- 

 mens as to give the appearance of short sublateral lines extending 

 most of the length of the segment. On the third abdominal segment 

 the yellowish markings are distinctly produced laterally and toward 

 the median line, forming a pair of submedian irregularly oval, yel- 

 lowish marks very suggestive of tubercles. These sublateral marks 

 are indicated on the remaining segments only by inconspicuous dots, 

 a pair on the anterior and posterior annulets of each segment, the 

 yellow markings becoming a little thicker and more irregular on the 

 nth, I2th and 13th segments. 



The true legs are a variable yellowish and reddish brown, the 

 distal segments being somewhat darker. The first pair of prolegs 

 are dark brown basally and yellowish brown apically ; the anal pro- 

 legs are mostly yellowish brown ; the venter is nearly the same color 



