INSECTS AFFECTING PARK AND WOODLAND TREES 83 



reddish blotch covering most of the posterior portion. The abdomen is 

 coal-black. The male may also be recognized by its more pectinate 

 antennae. 



The pupa is about lyi inches in length, brownish in color, and with 

 the dorsal surface of the abdominal segments ornamented with conspicuous 

 rows of toothlike processes, as represented in ])late 5, figure 6. The anterior 

 row on each of the segments having two is much stouter than the pos- 

 terior. The three terminal segments have but a single row in the 

 female, while in the male there is a second row on all e.xcept the last two. 

 This sexual character was first brought to attention by Dr Lintner in 

 his 2d report as state entomologist. 



The full grown larva is a large white caterpillar about 2^ inches long. 

 The head is brownish, with mouth parts a very dark brown, and the well 

 developed thoracic shield is dark brown along its anterior margin. The 

 white body is frequently suffused with rose red, and bears on each segment 

 several minute brownish tubercles from each of which there springs a 

 hair. The spiracles are brownish. The young larvae resemble the nearly 

 matured ones very closely. 



The eggs have a broadly oval form, and are about one half the size of 

 a grain of wheat, being ' ,0 inch in length, and about ^ that in diameter. 

 They are of a dirty whitish color, with one of the ends black, and when 

 highly magnified, the surface is seen to be finely reticulated or marked by 

 rows of slightly impressed dots [pi. 5, fig. 4^7]. 



Distribution. This insect is a rather common borer in Massachusetts, 

 New York and New Jersey, and has been recorded from as far south as 

 Te.xas. It is also regarded as quite injurious in the Western States. It 

 would thus appear that the insect has a general distribution in the states 

 east of the Rocky mountains, at least. 



Food plants. The describer of this insect. Professor Peck, met with it 

 first in black locust, and subsequently observed the same species in black 

 oak. The insect is also known to attack ash and maples, which are injured 

 very seriously in New York at least, and in the Western States it is 



