INSECTS INJURIOUS TO THE MAPLE. 103 
few days the larva hatches. Professor Comstock thinks there are two 
and possibly tlree broods in a season, and that the insect may hibernate 
both in the adult and pupa stages. 
The following insects also feed 
on the locust: 
13. Spermophagus robinie (Fabri- 
cius), Family Bruchide 
(see Horn, Trans. Amer. 
Ent. Soce., iv, 311). 
14. Sciapteron robiniew H. Ed- 
wards. (Destructive to lo- 
custs in Virginia City, 
Nevada. Bull. Brooklyn 
Ent. Soc., iii, 72.) 
15. The Io moth, Hyperchiria io 
(Fabricius). (See p. 111.) 
16. The hickory tussock moth, 
Orgyia leucostigma. i 
17. The locust goat moth, Xyleutes 
robinie, which more com- 
monly affects the oak. (See 
p. 6.) Pe 
18. Clisiocampa erosa Stretch. Fic. 44.—Locust saw-fly. a, eggs; b, c, worms; d, tail 
Oregon. (Papilio, i 67.) of the same; e, cocoon; f, fly.—After Comstock. 
19. Gelechia pseudacaciellaChamb. Larva feeds externally on the leaves 
and also in the mines of Lithocolletis robiniella (Chambers). 
20. Xylesthia clemensella Chamb. Larva bores in dead locust-timber 
posts, ete. (Chambers.) 
INSECTS INJURIOUS TO THE MAPLE. 
(Acer saccharinum and Acer rubrum.) 
1. THE SUGAR-MAPLE BORER. 
Glycobius speciosus (Say). 
Boring into the solid trunks of healthy sugar-maple trees, often killing them, a 
rather large, footless, cylindrical, whitish grub, changing in July to a large, beautiful, 
yellow-striped beetle, marked with a golden W on the wing-covers. 
Although the question as to whether longicorn larve will bore into 
healthy solid wood is by some regarded as undecided, there is no doubt 
but that the present larva bores for several inches into the trunks of 
healthy trees, both young maples as well as trees ten or twenty inches 
in diameter. The following case fell under our own observation. On 
the grounds of Bowdoin College, Brunswick, Me., for two successive 
years (1873~74) a number of fine sugar or rock maples, nearly a foot in 
