122 THE CANADIAN ENTOMOLOGIST. 



DESCRIPTION OF PREPARATORY STAGES OF AGRAULIS 

  VANILLAE, Linnaeus. 



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



Egg — Conoidal, truncated, the top a little arched ; the sides more or 

 less convex, varying ; the height to the breadth as 9 to 7 ; marked by 14 

 straight ribs, which are compressed and elevated, and run from base to 

 top ; crossed by about 1 1 striae, horizontal, rather prominent ; the spaces 

 between the ribs and strise are quadrangular, the shortest side being with 

 the long axis of the egg ; these spaces are depressed and are either flat or 

 slightly convex ; the summit is covered with rows of cells, concentric, 

 those of the outer two rows large, hexagonal and irregular, of the third 

 row small, hexagonal ; within these are 8 small cells, not depressed, 

 irregularly rhomboidal and forming an eight-rayed star ; in the centre a 

 minute star of six rays. Duration of this stage 4 to 5 days. 



Young Larva — Length .14 inch; cylindrical, thickest at 4, tapering 

 slightly to 13, the segments well rounded ; color brownish-orange, glossy ; 

 on either side the dorsal line on each segment after 2 is a row of short, 

 conical, pale black tubercles, and two similar rows on either side, 

 forming transverse rows of 6 tubercles, from the top of each of 

 which springs a short black hair ; on 2 is a black dorsal collar, with fine 

 tubercles ; feet brown ; head nearly globular, flattened on lower front 

 face ; color brown ; slightly pilose. Duration of this stage about 2 days. 



After First Moult — Length .24 inch ; same shape; nearly same color, 

 less brown, more orange ; armed with six longitudinal rows of long, 

 tapering, black spines, at top sub-conic, each ending in a fine, short, black 

 bristle ; a few similar bristles about the spine from base up (for arrange- 

 ment of the spines, which is uniform in all the succeeding stages, see 

 description of the mature larva) ; on 2 a dark chitinous collar, broken at 

 the dorsal line, and bearing minute hairy tubercles ; feet black ; head 

 obovoid, the sides quite convex, the face flattened, the top depressed, and 

 on each conical vertex a simple black process very similar to the body 

 spines, but less tapering and much shorter, pointed at top and ending with 

 a short fine bristle ; others disposed about it just as with the spines ; a 

 few hairs, "long and short, on front face ; color chocolate-brown. To next 

 moult 2 days. 



