170 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



on the widenings. The rest bright yellow, except a narrow band in 

 the lateral space and the subventral area, which are translucent 

 greenish. Lateral line and subventral edge yellow. Depressed spaces 

 slight, the dorsal (1) glandular centers showing pale, paired; lateral 

 (4) more distinct, showing centrally as a yellowish dot in a trans- 

 lucent area,_ yellow-edged below. A yellow bridge on joints 3 and 4; 

 triangular dots on 5 ; a broken bridge on 11; continuously yellow to 

 12-13, forming a pattern like a grill between the horns of these seg- 

 ments. Skin clear-granular, the granules irregular in shape, sha- 

 greened. Joint 2 purplish ; the cervical shield green with several 

 black spots. Head within the hood, largely black. Creeping disk 

 honey yellow. Length, 18 to 24 mm. Duration of the stage, seven 

 days. 



At the end of the stage the larvas became slightly more livid in 

 color, left the leaves, and traveled upon the branches of the tree to 

 find a fork or crotch, where the cocoon was spun. 



Cocoon. Elliptical, 'rounded, smooth, hard, and de"nse, firmly at- 

 tached upon one side to the bark of the tree. White and gray-brown, 

 marked in a peculiar pattern. Usually there are several broad brown 

 streaks radiating from each pole of the cocoon, but the colors may also 

 be variously intermixed, or even nearly uniform gray. The moth 

 emerges by a circular lid, of which there is no sign from the exterior. 



Food-plants. Various deciduous trees and shrubs. Gribodo records 

 pear and rose. Kraepelin found the cocoon on maple. Pryer found 

 them on b'rch, elm, Celtis, and Japanese persimmon. Fernald found 

 the Norway maple the preferred food, but also pear, apple, cherry, 

 and less commonly willow, birch, oak, elm, blackberry, beech, poplar, 

 mountain-ash, buckthorn, and rose. My larvse fed readily on wild 

 cherry, though the liberated moths did not oviposit on this tree, but 

 on maple, rose, and cultivated plum. 



EXPLANATION OF PLATE XIV. 



FIG. 1. Larva of Cnidocampa flavescens, stage I, diagrammatic. 



2. Young larva of same, stage V. 



3. Mature larva. 



4. Caltrope spines of mature larva, greatly enlarged. 



