﻿OF THE STATE ENTOMOLOGIST. 



83 



Fall Canker-worm:— a, 6, egg, side i 



f^'s-17.] The Fall Canker-worm [Anisop- 



ieryx pometaria Harr., Figs. 17, 18.) 

 — This insect is easily distinguished 

 from the preceding, when critically 

 examined. It is, on the average, 

 somewhat larger and more glossy ; 

 the front wings of the male have a 

 .„„,, . w • • t ,-i - -^--A. '«">^*op distinct white spot on the front edge, 



views; e, rf, joints ot larva, side und top views, ^ ® ' 



showing markings— eularged; <■, batch of eggs; c.y,A a^P PrOSSPd hv twO Dale lae-o-pd 



/, full-grown larva; ^, ieraale chrysalis-natu- "^"^ '^^^ crObbCU vy LWU pdie, Jdgj^eu 



ralsize; h, top view of aual tubercle of chrj'sa- i -i „i^ iU„ „;/!„„ ^c u;„u tl,„_^ 



lis, eularged. bands, along the sides or which there 



are several blackish dots. The hind wings also have a pale, curved 

 line, more or less distinct, across their middle. The female is uni- 

 formly dark ash-gray above, paler beneath, with the antennas naked, 

 and the legs and abdomen smooth and glistening, and with no exten- 

 sile ovipositor. Thus it lacks the characteristic spines of vernata^ the 

 dusky marks across the front wings, and the pubescence in the female ; 

 and there are many other minor differences, which are mentioned in 

 the tabular and comparative description of the two insects further on. 

 The moths rise mostly late in the Fall, but also during the warm 

 weather of Winter, eve." to Spring. The eggs are tough, with a flat- 

 tened crown of a purplish color, and having a dimple in the center 

 and a brown ring near the edge: they are not secreted or^ hidden 

 under scales, but are laid in regular and compact batches, of from 100 

 to upwards of 200, on the surface of twigs or of the trunk, being fast- 

 ened by a strong glue, and covered with a slight coating of grayish 

 varnish. The larva is distinguished from that of the Spring Canker- 

 worm by having a dark brown back, and three conspicuous broad, pale 

 f*''g- ^^-^ yellow lines each side, as well as 



by having a third pair of prolegs, 

 shorter than the others, on the 8th 

 joint. It develops very rapidly, en- 

 tering the ground, with favorable 



Fall Canker-worm— a, male moth; 6, female i.u - wifhin thrpp wppks aftpr 



do. -natural size; c, joints of her anteiinaj; d, Weainor, WllUin LUree WtJCKb dlier 

 joint of her abdoraea—eularged. ^ l t • j • i i „u 



hatching ; and, singularly enough, 

 suffers but two molts, exclusive of that which takes place under- 

 ground in transforming to the chrysalis. It is found principally on 

 the Elm, and has not yet been reported from the Mississippi Valley. 

 The female chrysalis is stout and has a little, decurved, bifid thorn on 

 the tip of the body superiorly. It fias] perfect wing-sheaths, though 



