THE CANADIAN ENTOMOLOGIST. 



verse yellow band. Spiracles transversely oval, with brown centres, 

 encircled with yellow. Taken during the latter part of August, while 

 feeding upon Acer rubrujn. 



Variety of same. 



Des. — Length 2^ inches. General color p;reen, with a stronger and 

 richer tinge of yellow. Head and oral appendages a deeper shade of 

 brown than the preceding. The warts of the color of red sealing wax along 

 the back, but upon the lateral walls somewhat elongate oval in shape, of 

 an orange color in the middle, deep red above and below, and with a 

 narrow vein of the latter color encircling the whole. Spiracles trans- 

 versely oval, red in the centre, and surrounded by an orange-colored 

 border. Taken during the second week of October while feeding upon 

 the leaves of Acer riibrum. Number of specimens captured, twelve. 

 These caterpillars have a very close resemblance in markings to the 

 normal form of the larva of A. /una. 



Eachs iinpcrialis, Hubner (normal). 



Des. — Length, four inches. General color, varying from a dark to ?. 

 light green. Head nearly elliptical, dark brown. Oral appendages 

 similar in color. Six rows of spiniferous tubercles, two dorsal, two 

 lateral, and two sub-lateral, extending from the first to the last segment. 

 The meso and meta-thoracic spines moderately long and slightly curved ; 

 spiracles oval, with dark centres and yellowish margins. The entire larva 

 invested with a dense growth of long gray hairs. Taken during the last 

 week of August, and the early part of September. This species has been 

 observed to feed upon Jwiipei'us Virginianits, J. coiniminis, Acer ruhrnvt 

 2nd the various species of Fi?ius. I might add here that for the past 

 four years, in the neighborhood of Germantown, it seems to have deserted 

 in a great measure Coniferous plants, and to have taken to Acer riibnuiK 

 Where I find one upon cone-bearing plants, I discover twenty upon the 

 Red ]Maple. 



Several varieties of the iniperialis of Drury have been observed as 

 late as the 12th of October, exhibiting niarked contrasts from the normal 

 form, and varying slightly from each other in the details of color 

 and marking. 



Variety A. 



Des. — Length, two and three-fourth inches. General color, reddish 

 brown. Head and oral appendages similarly colored. Spines small in 



