319 



Prologs six ; two on the eighth, two on the ninth, and two on the last or 

 twelfth segment. Body cylindrical, attenuated behind. Head rounded, 

 slightly indented above, brownish white, longitudinally striped with twenty- 

 four brown lines in contiguous pairs. Body clay brown, with two dark 

 brown dorsal stripes, each composed of three approximated lines. Be- 

 tween 'these stripes arc two fainter, approximated lines along the middle of 

 the back, more distinct before than behind. Each side of the body above 

 the lateral fold with six faint, slender lines in pairs; a dark brown one on the 

 lateral fold, in which are situated the dark brown spiracles. Several faint 

 brownish lines in pairs beneath the lateral fold, and a broad black stripe in 

 the middle of the body beneath. Abdominal prolegs livid, a few blackish 

 dots on each segment, most conspicuous on the sides near the lateral fold, 

 and on the dorsal stripes. Two black dots in the intersections between 

 the fourth and fifth segments, and two more between the fifth and sixth 

 segments, seen only when the body is curved upwards. They are on the 

 dorsal stripes. 



Paythenos nubilis Hiibn. 



Sept. 3, 18iD. Found on ground under Robinia. 



Wood gray or light cinereous brown, with two darker, irregular, dorsal 

 stripes, laterally indented and forming almost a kind of chain on the back, 

 on each side of which is a row of white points (two in each segment, on 

 each side) ; below these a similar but much more irregular, dilated and 

 wavy, double, dusky stripe, including the blackish spiracles, and about three 

 white points to the side of each segment. Head reddish gray, marbled 

 with brown. Prolegs with an external, longitudinal, brown stripe ; anal pair 

 very long, all the rest progressively (forward) shorter, the first pair being so 

 short as not to be used in walking. Body beneath dirty white, with a row 

 of lozenge shaped blackish spots in the middle. Motion geometrideous. 

 Attitude in repose generally stretched at full length. Sometimes with 

 head and body curled as in Eudidia. Length one and four fifths inches. 



Sept. 6-12, 1852. Hides itself in holes of the trunk of Robinia pseuda- 

 cacia, and comes out at night to eat the leaves. 



Length two inches. First pair of prolegs rather smaller than the others, 

 and rarely used in creeping or resting. Color brown above, finely dotted 

 and variegated with dark brown ; body beneath pale brown, with a black 

 spot between the prolegs, and a blackish streak beneath the last three seg- 

 ments. Two zigzag, brown lines (almost black posteriorly) form a series of 

 lozenges along the back, one lozenge being on each segment, and becoming 

 gradually narrow behind. Each lozenge, especially those of the hinder 

 segments, has a black spot near the hind angle. A pale line on each side 



