INSECTS AFFECTING PARK AND WOODLAND TREES 265 



diameter. A lar^e number of individuals were bred during- the months 

 of February, March and April 1897. Dr Lintner, in the same year, 

 called attention to the abundance of these beetles in a house where they 

 bred from firewood, a fact which has been previously recorded. He 

 states that this species is usually rarer than the locust l)orer. Dr J. B. 

 Smith records this insect as common throughout New Jersey where it 

 breeds in hickor\' and is often rather injurious. 



Life history. The life history of this species has been practically given, 

 so far as known, in the preceding records. The beetles commonly appear 

 in the spring in New York State, oviposit shortly thereafter, and the young- 

 bore in the trunk during one season and possibly longer. The winter may 

 be passed in the pupa state as recorded by Dr Hopkins and possibly in the 

 larval form. The characteristic work of this species is shown on plate 15, 

 figures j-i 2. 



Description. The larva of this species has been described by Dr .\. S. 

 Packard as follows : 



Larva. Body thick ; mouth parts black ; head reddish behind the 

 antennae. Prothoracic segment (first behind the head) large and broad, 

 being one half as long as broad ; fiat and broad above, the upper surface 

 being lower than that of the succeeding segment; the anterior edge 

 thickened, being slightly corneous ; a mesial deeply impressed line, espe- 

 cially on the hinder two thirds, where it becomes a broad, deep, angular 

 furrow, dividing the tergum into two quadrant-shaped halves; the outer 

 edge of the segment rises above the flattened tergal portion, which is 

 sparsely covered with hairs, the latter thicker along the sides of the body. 

 The body contracts in width behind the fourth abdominal segment ; the 

 upper side of each of the first six abdominal segments (corresponding to 

 those segments in the beetle) is raised into blisterlike swellings, especially 

 on the fifth and sixth segments, which are much narrower than the four 

 preceding segments. These dorsal swellings are smooth and free from fine 

 hairs. Abdominal segments seven to nine convex above, not swollen, and 

 the abdomen is narrowest between the fifth and sixth segments. A pair of 

 large spiracles on the mesothoracic segment, and a |)air on each of the first 

 eight abdominal segments. 



Antennae three jointed ; the two basal joints being of the same length ; 

 the basal one being one third stouter than the second ; the third joint fili- 

 form, and one half as long as the second joint, and ending in iwo or three 



