INSECTS INJURIOUS TO THE PINE. 145 
94. Chaitophorus viminalis Thomas. (On young twigs and leaves of 
Salix lucida and S. babylonica. Thomas, 8th Rep., 200.) 
95. Lachnus salicicola Uhler. (Aphis salicti Harris. Thomas, 8th Rep., 
113.) 
96. Lachnus salicetis Fitch. (Thomas, 8th Rep., 119.) 
97. Rhopalosiphum salicis Monell. (On under side of leaves of Salix 
lucida, S. nigra, and S. babylonica. Monell.) 
ACARINA. 
98. Acarus? semen Walsh. (Producing galls on Salix nigra Walsh, ~ 
Phila. Entomol. Soc., Phila., v.) 
99. Acarus? enigma Walsh. (Producing galls on Salix nigra Walsh, 
Phila. Entomol. Soc., Phila., v.) 
INSECTS INJURIOUS TO THE PINE. 
Pinus strobus, P. rigida, ete. 
AFFECTING THE TRUNK. 
1. THE LARGE PINE FLAT-HEADED BORER. 
Chalcophora virginiensis (Drury). 
Order COLEOPTERA; family BUPRESTID&. 
Boring in the sap-wood and girdling the tree, a flat-headed, white grub; the track 
beginning as narrow and shallow grooves on the surface of the wood, forming irregu- 
lar wavy or serpentine tracks, which gradually increase in width as the larva grows, 
ending in a large hole where the grub pupates; the beetle occurring on the leaves in 
spring and autumn. 
The habits of this beetle in its preparatory stages are probably much 
like those of Chrysobothris femorata, which infests the oak, and the gal- 
leries which it makes under the bark are much like those of the oak 
buprestid. No thorough observations have been made upon the natu- 
ral history of this beetle. It appears in the Northern States toward the 
end of May, and through the month of June, as Harris states, while 
we have observed it in Maine on pine trees the middle of July, and 
Fitch states that they occur upon the leaves of the pine in autumn. 
Harris says that in the larva state it bores into the trunks of the differ- 
ent kinds of pines, and is oftentimes very injurious to these trees. 
‘The beetle—Oblong oval, brassy or copper-colored, sometimes almost 
black, with hardly any metallic reflections. The upper side of the body 
is roughly punctured; the top of the head is deeply indented; on the 
thorax are three polished, black elevated lines; on each wing-cover are 
two small square impressed spots, a long elevated smooth black line 
near the outer, and another near the inner margin, with several short 
lines of the same kind between them; under side of the body sparingly 
covered with short, whitish down. Length 0.8 to 1.10 inch. | (Harris.) 
10 RIL 
