— 193— 



North the food plant is Oak only, while in California, Nevada and Ari- 

 zona the food plants are Willow and Poplar, and while Oak is in many 

 places con:imon, I am not aware, that the larva has in those places ever 

 been found feeding upon it. 



The lAvva. of H. A'ez'adensis was originally described by Mr. Henry 

 Edwards (Proc. Cal. Acad. Sci. Apl. 19, 1875). These described above 

 do not differ very materially from those described by him, and yet in 

 some respects they seem to vary. He found the food plant to be Willow. 



Larva of Chlorosea bistriaria, Pack. 

 By Geo. D. Hulst. 



Head rounded, somewhat furrowed between the eyes. Color clay 

 green, with scattered dark flecks. All parts heavily rugose. Body con- 

 siderably swollen just behind the head, then the segments condnuing 

 nearly of the same size to the last. Ground color of the whole, a dirty 

 clay white ; somewhat russet anteriorly on dorsum, with dusky, irregular 

 and broken markings below. The segments are distinctly separated from 

 each other, and each one is very rugose and as well ridged and tubercled. 

 First there is on each a raised ridge on each side of the dorsal line, not 

 very distinctly marked with a small tubercle and hair point, on the 

 anterior portion of each segment. Then a supra-lateral ridge of tubercles, 

 one on each segment, angular, and somewhat extended backward, much 

 after the ordinary pattern of the larvae of Aplodes. Each of these tubercles 

 is surmounted at the point by a smaller cylindrical tubercle, somewhat 

 spiny haired on sides, and with a single prominent spine on the summit. 

 Laterally there are two oblique ridges on each segment. The spiracles 

 are marked by black points. The prolegs are dusky in color, the ventral 

 are of the color of the body. Food plant, the flowers of Golden Rod, 

 (Solidago). 



The larvce has a peculiar method of progression, which I have noticed 

 in a few other Caterpillars. As it reaches forward to advance it moves 

 the forward part of the body with a trembling palsy like motion, bobbing 

 the head at the same time from side to side. 



The larva has at the same time a very remarkable habit. After eat- 

 ing the scales of the involucre of the flowers, it places the flowers upon 

 the spines which surmount the body on each side of the dorsum. These 

 soon drying, become distended, and thus the larva? is thoroughly hidden, 

 as it absolutely resembles the ripening flower heads, for about all that is 

 visible is composed of them. Mr. Bruce, to wliom I am indebted for the 



Entomologica Americana. Vol. hi. 3U Januaey lfS88. 



