-65 - 



black suranal |)lale is sub-lrianj^ular, hciii.;^ ohluscl)' poiiUctl in 

 front ; tlic surface is rmitjh, bcarinj^- a rouji^h, low tubercle in front 

 on which are minute piliferous warts. The body is somewhat flat- 

 tened, bein.ij broader than hiji^h, and of a peculiar, jiale i^laucous- or 

 sea-green, the skin beinir polished like porcelain. 



The hairs under a jj inch objective are seen to be sliji;htly 

 bulbous at the tip, and therefore ji^landular, but untler a lower 

 power appear to taper like ordinary set;e. in stayc 11. the 

 hairs are also slightly bulbous, and clear at the tip. 



At the end of stage I. — Length, 5-6 mm. The body is nuu h long- 

 er than before, so that the tubercles are farther apart, antl now the 

 Sth segment has the dorsal wart surroundetl by an amber-yellow 

 spot rentlering it more conspicuous, aiul also the lateral concolorous 

 line has appeared ; the same tint occurs on the base of the abdom- 

 inal legs. 



(Specimens describeil in part from life, -Aug. 2). Length 

 at the end of the stage, just before exuviation, 6 mm. 'I'he 

 head is motlerately large, in the single larva observed not so wide 

 as the body, as it was about to moult, the i)rolh('racic segment 

 being greatly swollen, (hi alcoholic specimens, the head antl black 

 piliferous tubercles of the larva in the ne.xt stage can be seen 

 through!) 'I'he head is now black antl slightly bilobed, and 1.5 

 mm. wide. 



The i^rothoracic ]ilate is rather broad, but cpiite short antero- 

 posteriorly, with four piliferous warts on the front, and four on 

 the hinder edge. The piliferous warts on the succeeding seg- 

 ments are large, distinct, bhuk. and bear but a single hair. The 

 tubercles on the 2d and j^tl thoratit- warts are arranged in a 

 straight transverse row ; the two dorsal ones are slightly larger 

 than those on the 3d thoracic segment. On the abdominal seg- 

 ments the four dorsal tubercles are all the same size and arranged 

 in a trapezoid, which becomes longer going backward to segment 

 7. On the Sth segment there is a double large black tubercle bearing 

 two bristles, the tubercle is several times larger than any of the 

 others, and is evidently the result of the coalescence of the 

 homologues of the two dorsal warts occurring on the segments 

 m front. The 9th segment with the four dorsal tubercles arranged 

 in a square, with the lateral ones farther up on the back than the 

 homologous ones in front, and in a sub-dorsal position. The 

 suranal plate is black-brown, nearly three-fourths as long as broad, 

 bearing si.x marginal and two dorsal median hairs. The thoracic 



