84 FIRST ANNUAL REPORT OP 



on (lie roots of the grass, though other food was thrown into the jar. 

 On the 7th of June it measured 1.80 inches when crawling, and on the 

 10th of the same month had changed to a chrysalis from which the 

 moth emerged on the 7th of July. The worm is represented at Figure 

 SO, and may at once be distinguished from all others of its tribe, 

 that are known, by its translucent glassy green body, in contrast 

 with a very distinct hard, polished, dark-brown shield on the first seg- 

 ment, and a bright venetian-red head. The usual spots on the body 

 are quite distinct, and placed in the positions given at the lower out- 

 line of Figure 30, which represents the side of one of the middle seg- 

 ments. 



The moth bears a close general resemblance to the Cochran Rus- 

 tic already described, the ground color being the same. It differs in 

 its larger size ; in the wavy transverse lines being more equidistant; 

 in the spots in the shape of arrow heads, which emanate from the 

 inside of the last or outer line, being darker and more distinct ; and 

 in the outer edge of the large kidney-shaped spot being almost al- 

 ways quite white. Entomologically, it differs still more essentially, 

 for though named Agrotis devastator, it seems to belong to the genus 

 Mamestra. Here we have the converse of the facts given, in speak- 

 ing of the Dingy cut-worm, for, closely as the Cochran Rustic and 

 this Devastating Dart moth resembles each other, their larvreare x>:ry 

 dissimilar. 



Agkotis (Mamestra) devastator, Brace— Larva.— Length 1,80. Color translucent glassy 

 green, with a tinge of blue. Usually, a very deep bluish dorsal line. Four distinct piliferou- 

 on each segment, each with a slight annulation. Two other minute simple spots, without hairs on 

 the anterior edge of the segment (see Fig. 30, ). Bead, bright Veneftian-red, with black jaws, and 

 a small black spot each side. Cervical shield, very distinct, hard, polished and of a dark brown. 

 Caudal plate, less defined and more dusky. The body is lighter posteriorly than anteriorly and the 

 dorsal line is most distinct along the middle segments. 



Chrysalis — Quite dark mahogany brown, with the body Bomewbat more attenuated than is 

 usual, and with two distinct slightly curved thorns at extremity with several other stiff bristles 

 around them. 



THE SPECKLED CUT-WORM— PI. 1, Figs. 14, 15, 16 and 17. 

 I arva of the Subjoined Iladena, Iladena subjuncta, Or. & Rob.) 



At two different times, I have found in a truck garden hiding in 

 the ground, under cabbage plants, near St. Louis, a cutworm which 

 may be known by the above name. On one occasion, I also received 

 the same worm from my friend, Mr. A. Bolter, of Chicago, who found 

 it in Wisconsin. It is at once distinguished from all others that ..re 

 known by several characteristics, but more especially by being 

 speckled as with pepper and salt, when viewed with a pocket lens, 

 the ground color being flesh-gray, with a tinge of rust color in the 

 middle of each segment. The head is marked as in Figure 15, each 

 segment on the back as in Figure 16, and the extremity as in Figure 

 17 of Plate 1 — these figures being enlarged the better to show the 

 markings. 



Those \> Inch I bred, fed voraciously on cabbage leaves during the 

 night and lay concealed and motionless during the day. Before 



