158 THE CANADIAN ENTOMOLOGIST. 



DESCRIPTION OF PREPARATORY STAGES OF HELICONIA 



CHARITONIA, Linn. 



BY W. H. EDWARDS, COALBURGH, W. VA. 



Egg — Cylindrical, one half higher than broad, flat at base, tapering 

 very slightly from base to about three fourths the length, then conoidal, 

 the top flattened and a little depressed ; marked by 14 vertical ridges, 

 straight, narrow, not very prominent, and extending from base to the 

 middle of the cone ; below the cone are horizontal stri^, which with the 

 ridges enclose long, rectangular spaces; there are nine tiers of these, each 

 space roundly excavated ; above the base of the cone are similar spaces 

 in one tier, but they are higher and more nearly square and more deeply 

 excavated ; next these is a tier of seven cells, irregularly pentagonal ; the 

 flattened top is composed of three concentric rows of small spaces, the 

 outer one largest, and this and the next formed of pentagons ; the inner 

 row is made of rhomboids with the micropyle in the centre ; color yellow. 

 Duration of this stage 3 days. 



Young Larva— Length .08 inch ; cylindrical, segments 2 to 7 of 

 about even thickness, then tapering, the dorsum sloping ; marked by six 

 rows of rounded tubercles, each of which sends out a long black hair, 

 those on three anterior segments bent forwards, the others back ; there is 

 also a minute tubercle at the junctions of the segments a little below the 

 subdorsal row, with short hairs ; color pale red-brown ; legs and feet 

 same; head obovoid, a little lighter in hue than the body; sparsely* 

 pilose. To I St moult 2 to 3 days. 



After ist Moult — Length .22 inch ; cylindrical, nearly even, the seg- 

 ments a little rounded ; color light brown, changing, as the stage proceeds, 

 to greenish-white, mottled with brown ; armed with six rows of spines, two 

 sub-dorsal, one on middle of each side, and one infra-stigmatal ; these 

 spines are short, slender, tapering, black, with a few short black bristles 

 on the sides standing almost at right angles to the spine ; on 2 a chitinous 

 dorsal patch with hairs ; feet and legs brown ; head obovoid, truncated, a 

 little depressed at the suture, the vertices low, rounded, and on each a 

 short, tapering blunt process, black, with a few fine bristles. To next 

 moult 2 days. 



After 2nd Moult — Length .5 inch ; color dull white, mottled or 



