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segment ; color of body white, tinted yellow at the junction of 

 the segments ; on each segment after the second a transvei'se 

 row of short black hairs, and a few hairs back of this row ; on 

 the second an obovate black spot on each side of the dorsal 

 line, with many black hairs; on the third and eleventh each, two 

 subdorsal black prominences ; head obovoid, the vertices 

 rounded, smooth, black ; before the moult a brown stripe ap- 

 pears on the middle of each segment, and pale stripes on the 

 head. Duration of tliis stage from two to five days. 



After 1st moult. — Length 4 mm. ; cylindrical ; banded with 

 white, and pale yellow and black, tlie latter occupying the middle 

 of eajcli segment after the second, with white on each side, yellow 

 being at the extreme edges ; on the third a short, tapering, blunt, 

 black process, flattened transversely, on each side of the dor- 

 sal line, and similar but shorter processes on the eleventh ; head 

 obovoid, at first black, but afterwards light stripes appear ; 

 these become distinct, and at last there is a black triangle with 

 yellow centre on the front face ; next above is a yellowish 

 band, followed by a black one, then a pale line and after that 

 black to the back of the head. Duration of this stage two to 

 four days. 



After 2d moult. — Length 7 mm. ; same shape, and banded 

 as before ; several segments now sliow a black line on the dor- 

 sal area next after the anterior yellow band, the processes on 

 the third and eleventh segments are straight, rounded, black, 

 2 and 1 mm. long respectively ; head striped black and yellow- 

 ish as at last stage, the upper stripes broader. Duration of this 

 stage two to four days. 



After 3d moult. — Length 12.5 mm. ; the black bands deep 

 colored, broader, and prolonged to base of body; on each side 

 of this a white band edged without by a black line on dorsum, 

 and then deep yellow to end of segment ; the processes slen- 

 der, tapering, black, 2.75 and 1.5 mm. respectively, but 

 twenty-four hours later 4 and 1.75 mm. ; each pair divergent, 

 the anterior pair projected forward and recurved, the posterior 

 projected backward, and also recurved ; head nearly as before. 

 Duration of this stage two to four days. 



After 4th moult. — Length 28 nmi., and at three to five 

 days later reaching maturity. 



