Honey-Producing Caterpillars. 141 



patches, where both star and spine are brown. This velvet- 

 like condition of the skin only reveals its true composition 

 under a magnifying glass. 



On the eleventh segment, near the posterior edge of the 

 back, is a transverse slit, in a sub-oval spot, from which pro- 

 ceeds a membranous process ; and on the twelfth, on each 

 side, is a mark like a stigma, but a little larger, from which 

 proceeds a membranous tube, ending in a crown of feathery 

 tentacles, these three special organs being exposed or con- 

 cealed at the will of the larva. The head is small, obovoid, 

 dark brown, and is placed at the end of a long, pale green, 

 conical neck, which is rectractile, both neck and head being 

 covered by the second segment. 



Before changing to a chrysalis, the summer larvae some- 

 times turn pink, and from pink to brown, or become brown 

 without the pink stage, although others remain white or 

 change to rusty brown. The body contracts to about three- 

 tenths of an inch and takes on a rounded form. 



The chrysalis is dark-brown or yellow-brown, but varying 

 in color, the wing-cases being dark or green-tinted. Two 

 sub-dorsal rows of blackish dots are found on the abdomen, 

 and sometimes a dark dorsal line. In the few instances in 

 which the butterfly emerges the same season the duration 

 of this stage is from thirty to sixty days, but most chrys- 

 alids pass the winter and mature in the spring. 



Now for a description of the butterfly. In general 

 terms, the upper side of the wings of the male is a deep 

 azure-blue, with a delicate terminal black border. On the 

 apical part of the fore-wings the fringes are black, but white 

 and barred with black on the rest of these wings and on the 

 hind-wings. In the female the fore-wings have a broad, 

 blackish outer border, in some examples extending along the 

 costa, while the hind-wings have a blackish costa and a row 

 of dark spots along the outer margin. Usually the ground- 

 color is a lighter blue in the females than in the males. A 

 pale silvery gray, with a silky lustre, is the color of the 



