GRAPTA I. 



After 2d moult : Length .24 incli ; color black, the lines as before, with the 

 addition of one running with lower laterals, more distinct, often macular; spines 

 as before, but variable in color ; in some examples, all are black except the 

 dorsals and first laterals on 4, 6, 8, 10, where they are reddish-yellow ; some 

 have the spines on these rows light, except on 9, 11, and 12 ; usually the second 

 laterals are black and the lower row is pale yellow ; in all cases the tips are 

 black ; as the stage proceeds tlie color of body changes to olive-brown, and the 

 lines become more conspcuous; head as before, much covered with white simple 

 spines. Duration of this stage from two to three days. 



After 3d moult: Length .5 inch; color black, with cream-white lines, quite 

 macular ; spines very variable ; some examples have every spine of the upper 

 five rows reddish to reddish-yellow, the lower laterals pale yellow ; some have 

 the dorsals and first laterals from 3 to 11 red, the rest and all of second laterals 

 black ; some have the body color vinous instead of black, with no black spines, 

 the upper rows very red anteriorly, the lower laterals yellow ; the lines yellow ; 

 head either deep brown red, or decided red in the vinous larvas, the processes 

 red, with spines both red and black ; the spines on face yellow or white. Dura- 

 tion of this stage two to three days. 



After 4th moult : Length .9 inch. In two to three days is fully grown. 



Mature Larva. — Length 1.3 to 1.5 inch; cylindrical, stout; the color verv 

 variable ; some are dull black with white, yellow, and red tubercles on the cross 

 ridges, and longitudinal lines and bands of red and yellow ; there being a band 

 along the basal ridge, a stripe running with second laterals, an oblique line from 

 base of each first lateral outwards to the front of the segment, and one from 

 either side of each dorsal also to the front of the segment ; some are very black, 

 the tubercles yellow, no lines or stripes above the basal ridge ; some are russet, 

 the lines and stripes obliterated, the tubercles yellow and red ; and there are 

 intermediate variations ; under side black-brown ; spines long, slender, tapering, 

 with several spinules at top, one being a continuation of the spine, the others 

 arranged somewhat irregularly ; these are of about equal length in the several 

 rows ; others, which are shorter, are found on the sides of the spines, and are 

 particularly numerous on the upper rows of the anterior segments ; the dorsals 

 iiave five main spinules, the first laterals six, the second and lower laterals four 

 and five ; in most examples tlie dorsals and first laterals are red, except on 3, 

 where they are red with black bases, and on 11 and 12, where they are usually 

 black, the red being deepest on anterior segments ; the second laterals are some- 

 times all red, and the lower row is always yellow (but in the varieties of this 



