698 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



the holes made by this borer as probably those of Ghalcophora vir- 

 giniensis, but they are regularly oval cylindrical, less flattened oval 

 than those made by a Buprestid, and exactly like those of other flat- 

 bodied longicorns. The openings, usually most abundant on the south r 

 side of the tree or stump, in the base of the trunk of the white pine, 

 are at times very numerous, as many as ten in a space of 5 square 

 inches. They are, on the average, G™™ wide by 3"'°^ deep, or half as 

 deep as wide. The sides are smooth, but the orifice is often partially 

 concealed by projecting portions of the bark. The holes are deep, ex- 

 tending 6 or 8 inches towards the heart of the tree. Seen longitudi- 

 nally the "mine" or tunnel is about a quarter of an inch (6™™) wide, 

 sometimes wider, and ends in an elongate oval cell, wherein the pupa 

 rests. Some extend up and down under the bark, while most of them 

 plunge deep into the wood. 



Larva. — Protliorax incliued downwards 

 towards the head ; quite long and not very 

 wide, being no wider than the mesotho- 

 racic and metathoracic segments, the 

 squarish area being very long, naked on 

 the basal third, the front margin pale 

 brown, chitiuous. Mesothoracic and met- 

 athoracic segments as wide as the protho- 

 racic ; the metathoracic slightly longer 

 and fully as broad as the mesothoracic seg- 

 ment. Abdominal segments rather broad, 

 the second the shortest and the siwenth 

 the longest ; the eighth two-thirds as long 

 as the seventh aud considerably narrower; the ninth one-quarter as long as the eighth 

 and three-fourths as wide ; the tenth only seen from beneath, and about two-thirds 

 as wide as the ninth, and bilobed at the end. On the two hinder thoracic and the 

 first abdominal segment are transverse regular oblong areas bounded by impressed 

 lines; on segments 2 to 4 the callosities are narrower, and the anterior side is pointed; 

 on the sixth aud se%entli they are a little longer than broad and coutracted poste- 

 riorly. Beneath are similar callosities, but the anterior edge is feebly indicated, the 

 sides being most distinct. Thoracic feet, minute, 3-jointed, small and rather short: 

 third joint one-half as thick as the secoud. Head : Clypeus very small, membran- 

 ous; labrum small, narrow, though longer than wide, and well rounded in front ; 

 mandibles solid, thick, rounded at tip; antennas 4-jointed, rather slender; second 

 joint about one-half as long as the first and about one-quarter shorter than the third ; 

 the fourth minute, slender, about two-thirds as loug as the third is wide. Maxillje 

 with the lobe rather broad, not very hairy, extending as far as the end of the maxil- 

 lary and labial palpi ; maxillary palpus 4-jointed ; first joint much shorter than long, 

 flattened, spherical ; second subspherical ; third one-half as long as the second ; fourth 

 longer than the third, but ouly about one-half as thick. Mentum narrow, about one- 

 third as long as wide; ligula long aud narrow ; labial palpi 3-jointed; first joint a 

 little longer than thick ; second very short, spheroidal, a little less than one-third as 

 long as first; third conical, considerably longer than the second and one-half as 

 thick. Length, 12"™; length of prothoracic segment, 2™""; breadth, 3™""; breadth 

 of eighth abdominal segment, 2.5'"™. 



The pupa is .44 inch long. It is flattened and rather broad, and may be readily 

 identified from the other pupa; of the genus, as it has the characters of the species, 

 viz, by the short antennae, which do not extend quite as far as the hinder edge of the 



Fig. 234— a, Larra; b, pupa and beetle (enlarged 

 twice) of the lesser pine-borer — From Packard, 

 c. the beetle, after Leng. 



