A STUDY OF CERTAIN CATEUPILLARS. ]237 



rows of iiiiiHitc (lark tiiniuoise spots, ami on tlie sides of the tliirtrtlioracic 

 segment a still further development of the markings, the whole now form- 

 ing a rounded, ([uadrangnlar, greenish yellow spot, rimmed delieately with 

 black, crossed above by a l)lack bar, and enclosing below a black annulus 

 with a turquoise centre. 



In Euphocades we start in practically the same way as in Jasoniades, 

 only the saddle is less oblique. In the second stage the caterpillar is 

 plumbeous, with the lateral Haps of the pale saddle more distinct than the 

 seat, the body paler below than above, and there is added a curving white 

 streak below the middle of the sides of the thoracic segments, seeming to 

 define better the tumid front portion of the body ; bluish dots appear alono- 

 the dorsal part of the segments, and on the third thoracic segment one at 

 the side is velvety black, edged above and below with yellow ; the 

 tubercles are only distinct at the extremities of the body. The third stage 

 hardly differs from the second, but the spot on the third thoracic segment 

 is now larger and wholly rimmed with yellow. The fourth stage also 

 closely resembles the preceding, but the tubercles are replaced by lenticles, 

 one on the third thoracic segment black and glistening, and included in the 

 black spot. The last stage is wholly different, the general color being a 

 pure green, on which only the minor spots remain as links to the past, and 

 reinforced by others which replace the lenticles ; the spot of the third 

 thoracic segment has altered; it is now a finely black-rimmed, large, 

 orange and yellow spot, including a quadrate black nucleus below the 

 middle, nearly half as large as the whole spot, and including within it pos- 

 teriorly a shining black, blue-edged lenticle ; a thin black line runs 

 between this nucleus and the outer black rim in front ; but an additional 

 spot appears on each side above on the first abdominal segment, a large, 

 finely black-rimmed, rounded orange spot seated at the posterior incisure 

 on a fine black line which enlarges where the spot touches it ; the two series 

 of small abdominal spots have become distinctly turquoise. 



In Heraclides the young larva is provided with exceptionally large 

 tubercles, which are largest at the two extremities, and especially on the 

 first thoracic segment, and these are all thickly beset with bristles ; the 

 body is largest in front but scarcely tumid ; the colors are veiy dark brown, 

 more or less mottled, with a distinct white saddle and lighter extremities. 

 Excepting that the front portion of the body is a little tumid, and that the 

 tubercles become relatively less important, there is no change in the next 

 two stages. In the fourth stage the front part of the body becomes dis- 

 tinctly timiid and at the same time develops an irregular, white, curving 

 lateral band, setting off the tumidity to better advantage ; the colors and 

 patterns are otherwise the same as before, but the tubercles have become 

 lenticles, and around them have clustered rings of brighter color, by which 

 the body is much mottled. Xo further change is made in the final stage 



