or: 



1893.] ^^ [PiKkard. 



ridge to the back of the second segment, or between the first pair of red 

 tubercles is a broad, irregular patch of dull purple, interrupted between 

 the second and third anterior red tubercles by a transverse green line. 



On the posterior half of the body is a patch formed of three purplish 

 patches connected together ; the third and last of the three portions form- 

 ing the patch, which ends before reaching the middle pair of the three 

 posterior pairs of tubercles. The sides of the body fall away precip- 

 itously, spreading out a little at the base or edge of the creeping ventral 

 disk. On this edge is a series of nine green pappose and spinose papilke 

 or tubercles, the anterior two or three and the last being very slightly 

 larger than the middle ones. Between the ventro-lateral and subdorsal 

 rows the sides are variegated with upright ridges connecting the lower 

 and upper tubercles. The sides of the body are dark pea-green, and the 

 dorsal region faintly yellowish green, the subdorsal papillae being yel- 

 lowish green and the lower ones dark pea-green. 



In one slightly larger (4.5 mm. in length) the body above is stained 

 less red and purple than usual, the posterior purplish patch not yet formed, 

 and only represented by purplish points, while the third pair of anterior 

 papillae and the first and third pair of the posterior set are still green. 

 Also the subdorsal line along the tubercles are whitish yellow. 



It thus at this stage varies considerably in coloration and in the distinct- 

 ness of the hues. 



Stage IV. — Length, 7 mm. When in this stage it only differs from the 

 smaller ones in the dorsal purplish patches being more greenish in the 

 middle, and edged distinctly with darker and externally brighter tints. 

 Each segment, also, covered by the purplish patches bears a pair of minute 

 greenish warts, which are much less distinct in the smaller ones ; some- 

 times two of these warts are connected by a greenish line. Also in this 

 stage the last pair of dorsal papillae are red, and the middle papillae are 

 stained with bright red on the inside at the base, sometimes the red stain 

 being connected with the red border of the dorsal patch. In this and the 

 next stage the body is somewhat higher over the thoracic region, falling 

 away slightly posteriorly. 



La»t stage {V), fully grown larvm. — Length, 12 mm. (The largest and 

 most distinctly marked larvae selected for description.) The body is of 

 the same shape as before, i. e., when one-half grown. The dorsal plateau 

 is as wide as the body, the sides falling away rapidly from the edge of the 

 plateau ; the sides of the plateau are rounded over, not forming ridges. 

 The two great patches on the yellowish plateau are pale purplish madder, 

 darker on the edges, and edged with bright brick-red or Venetian red, 

 while the papulae are bright cherry or vermilion red. There is a faint, 

 pale medio-dorsal line. The purplish patch begins on the front end of the 

 second thoracic segment and contracts deeply between the second pair of 

 papulae and again between the third pair, ending suddenly in a mucrouate 

 point situated between the sixth pair of papulae. The second patch begins 

 at a point situated between the sixth and seventh pair of papulte, contracts 



