572 PKOCEEDINGS OP THE AMERICAN ACADEMY. 



wliat longer, hut the hody is now of a porcelain white, and the bands, now 

 hroivn-hlack, are broken up into black spots. All the horns are now 

 longer, smooth, without the hairs of Stage I, while they appear as if 

 slightly twisted, being enlarged at irregular intervals and there giving off 

 a minute seta. The bead is still black ; there are two white longitudinal 

 bands, quite irregular in length and width, on each side of the head. 

 The antennae are black and the region around their base is black. The 

 clypeus-posterior is black with two yellow spots in the centre. The la- 

 brura and the region on each side is black. The head is fully as wide 

 as the body. 



First thoracic segment straw-yellow, with four dorsal black spots 

 whitish in the middle above ; two black spots ou each side. On the 2d 

 thoracic segment are two larger black spots, and two larger ones on the 

 3d segment. On each of abdominal segments 1-7 are five black dorsal 

 spots, the black bands now being divided into spots ; on segments 8 and 

 9 two dorsal black spots, and the front edge is black. The 8th segment 

 is orange-reddish, becoming deeper on the sides. The sides of the ab- 

 dominal segments below the spiracles are orange-ochre, on the thoracic 

 segments the corresponding region is yellowish. On the 9th segment 

 are two dorsal black spots, and on the front edge five black spots. 



Suranal plate pale straw-yellow, black at the end ; there are two small 

 black dots on the front edce. Each abdominal secrment with eight black 

 spots on each side of the median spot, making seventeen spots in all. 



Anal legs white, with five black unequal vertical stripes, the edge of 

 each stripe black all around. Mid-abdominal legs dark brown, with a 

 black ring at base, and another just above the planta. 



The skin is provided with very fine short scattered dark hairs, those 

 ou the mid-abdominal legs much longer than those on the body. 



Stage III. Length 17-27 mm. Width of head 2f mm. The head is 

 mostly black, but with white lines so disposed as to break it up into five 

 irregular black lines or spots on a side ; the two on the vertex, one ou 

 each side of the median line or suture of the head, above the apex of the 

 clypeus, each forming a short curved band ; the two lowest black spots 

 down on the side near the ocelli are triangular. Clypeus black, the head 

 being white on each side next to it. The anterior division of the clypeus 

 is white, as also the base of the antennae. Toward the end of the stage 

 the white lines of the head become wider, so that the black areas are 

 somewhat reduced in size. 



The body is pearly white, with a larger portion white, the black spots 

 being smaller and more numerous than in Stage II. 



