8 
more than three-fifths of an inch and the diameter is between one- 
tenth and two-tenths of an inch. 
The pupa (fig. 3, ¢) is grayish green, the thorax and end of the 
body are slightly yellowish, and the antenne, wing-sheaths, and legs 
are white with a slight greenish tinge.’ 
The distribution includes the States of Massachusetts, Connecticut, 
New York, New Jersey, Pennsylvania, Maryland, the District of 
Columbia, Indiana, Illinois, and Missouri. 
It is generally distributed on the continent of Kurope and occurs 
also in England and Scotland. 
Fic. 4.—Bristly rose slug (Cladius pectinicornis): a, Egg; b, portion of leaf showing 
eggs in situ and work of young larve: c, d, lateral and dorsal aspects of middle seg- 
ment of newly hatched larva; e, larval claw; f, rose leaf showing nature of defoliation. 
All except f enlarged. (Reengraved after Riley.) 
LIFE HISTORY. 
The bristly rose slug differs considerably from the preceding in its 
life economy. Its appearance at Washington, D. C., and at St. Louis, 
Mo., has been observed from the latter days of April to the third 
week of May, beginning about the time that the first rose leaves are 
put forth. Its eggs are inserted in the upper surface of the petiole 
of the leaf and are deposited in rows of three or more together. 
The slug in its earliest stage skeletonizes the leaves, leaving whitish 
blotches and small holes (fig. 4, 7), but with increased growth it eats 
large, irregular holes in the leaf (fig. 4, 6), devouring the entire sub- 
“More detailed descriptions of the stages are furnished in C. V. Riley’s 
article, Insect Life, Vol. V, pp. 6-11, which includes accounts of the other two 
species here treated. 
[Cir. 105] 
