118 Twenty-fourth Report on the State Museum. 



sented the following features : color light yellow-green ; the annulets 

 of the segments with whitish granulations, of which those on the 

 lateral portions of the third and fourth segments are annulated with 

 black ; lateral bands, cream-colored, margined with black, having 

 the characteristic outline of maturity, showing the three component 

 sub-oval patches, of which the posterior is the largest, and incloses 

 the stigma except at its upper part. Head smooth, of a uniform deli- 

 cate green. Horn four-tenths of an incli in length, slender, bending 

 anteriorly, ciliated, of a light reddish color, merging into a rose-color 

 at the tip ; its base occupying less than the posterior half of the tubercle ; 

 anterior to the base is a sub-triangular black wart resting on the crown 

 of the tubercle — the development of the " small triangular black spot" 

 of the preceding stage; the tubercle is yellow, almost surrounded near 

 its base with a band, the extremities of wdiich, instead of meeting, curve 

 upw^ard to the horn posteriorly. Anal shield and plates, legs and 

 prolegs of a uniform green. 



A short time after molting, a change of color was observed, and at 

 the lapse of six hours it had assumed a salmon color. After a night's 

 feeding, it was found to be of a reddish-brown color, deeper than 

 that which it ordinarily bears at maturity, and in marked contrast 

 with its former garb. A figure taken of it at this time represents it 

 as one inch and one-fourth long, 12-lOOths of an inch in diameter at 

 the central segments, and with a horn, 34:-100ths of an inch in 

 length, regularly curving anteriorly from its base to the tip. 



Fourth Qjiolt — July 27th. Head and body reddish-brown, but of 

 a lighter shade than before. Caudal horn absent, its former position 

 on the tubercle indicated by an oval spot having a central black dot. 

 Tubercle more prominent than in the preceding stage. 



The mature larva measured three and one-ten tli inches in length, 

 by one-half an inch in diameter, when at rest, at which time its 

 small head is nearly hidden within the first segment, which is with- 

 drawn within the «econd, over and in range with which projects the 

 third segment, presenting a front almost perpendicular to the body. 

 The posterior segment also descends almost perpendicularly from the 

 tubercle to the terminal prolegs. 



The descriptions and figures already published of this larva,* ren- 

 der a further account at the present unnecessary. The excellent 

 ficrure given of it by Mr. Riley cannot fail of securing for it ready 

 identification. 



♦ Clemens : Jour. Acad. Nat. Sci. Ph., 1859, p. 155. Harris : Treat. Ins. li\j. Veg., 1862, p. 325, f. 150. 

 Lintner: Proc. Ent. Soc. Ph., 1864, v. iii, p. 660. Harris: But. Corr., 1869, pi. 3, f. 11. Kiley: Sec. 

 Sep. Ins. Mo., 1870, pp. 74, 75, f. 49. 



