366 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



There is likewise another species (C rapiclns) which was found perforating the 

 young flower hiids and holls of cotton similar to the ahove. The head and anterior 

 portion of the thorax are reddish-brown, the reraainder of the thorax yellow with a 

 double mark in the middle ; the wing-cases are brownish-black, with two longitudi- 

 nal yellow lines from the ui3per outside corner of the wing-cases to the posterior edge, 

 forming a dividing mark, somewhat shaped like the letter X. 



He lias also described a species of Lygseus having similar habits 

 (ibid.). In his manuscript work on Cotton (see Glover, 1878, Bibl. List) 

 he ^gures Leptoglossus phyllopus (Lin.) {=Anuoscelis albicinctus Say),^w- 

 schistus punctipes Say, and Nezara pennsylvanica De Geer, all of which 

 are said to have been found piercing cotton bolls or buds, although their 

 habits are normally predaceous. 



The amount of damage done in this way by the Boll Worm is very 

 great, as a single young larva will travel from bud to bud, deserting 

 each before its fall, until many have been destroyed. A bud pierced 

 just before opening is forced into premature bloom j but the worm, 

 usually feeds upon the essential reproductive parts, rendering it in- 

 capable of fructifying. (Plate IV, Fig. 3.) 



As the worms increase in size a great diversity in coloration and also 

 in markings appears. Those indivi^duals w-hich have nearly reached 

 their full growth vary from a dark brown or rose color to a light green, 

 the latter being, perhaps, the predominant shade. Almost every con- 

 ceivable intermediate stage of color is to be seen, while the markings 

 vary almost as greatly. It seems to be well settled that the green 

 worms are most abundant in the spring, while later, as the cotton blos- 

 soms out fully and the silk of corn begins to assume its reddish tinge, 

 the pinkish variety becomes more abundant and the brown worms do 

 not appear in force until fall. 



In markings the worms vary from almost perfectly immaculate, un- 

 ste*iped individuals to those furnished^ with many spots and regular 

 stripes. The commonest (we can hardly say the normal) arrangement 

 of the markings is as follow^s : On each side of the body, extending from 

 the head to the anal joint and including the spiracles, is a broad, whit- 

 ish, lateral or stigmatal stripe. Justabove this is a less broad subdorsal 

 dusky stripe. Down the middle of the back is a narrower, dusky, medio- 

 dorsal stripe, including a fine white line, andbetween this and the subdor- 

 sal dusky stripe, in what may be called the dorsal space, are four or five 

 very delicate whitish lines, so delicate in fact as not to interfere with the 

 general color of the body. Of spots there are usually eight dorsally to 

 each abdominal joint, normally black in color, the four dorsal spots ar- 

 ranged trapezoidally, the anterior pair closest together. These spots 

 are simply piliferous tubercles and are very constant, a close examina- 

 tion of even the immaculate individuals showing them still to be pres- 

 ent, though colorless. Upon the meso- and meta-thoracic joints these 

 tubercles are arranged across the dorsum in a single transverse row. 

 Of the stripes the most constant appears to be the whitish lateral, all 

 the others being more often wanting. 



i 



