POPLAR LEAF-MINERS. 
469 
before the apex, points a little obliquely forward, and is margined behind by a small 
apical patch of brown dusting. Cilia white, with a brownish hinder marginal line 
at their base. Alar expansion one-fourth of an inch. Ohio and Kentucky. (Cham- 
bers, Bull. U. S. Geol. Surv. IV, I, 101.) 
49. Gracillaria sp. 
A caterpillar, presumably a Gracillaria, was observed July 31 at 
Brunswick, Me., turning over the end of an aspen leaf on one side. 
The moth was not reared. Fig. 167 represents another aspen leaf with 
the tip folded over, either by this or an allied species. Observed at 
Brunswick, Me. 
Fig. 167.— Aspen leaf folded by a Gracillaria.— Bridg- 
ham del. 
Pig. 168.— Aspen leaf folded by Gracil- 
laria.— "Wilder del. 
50. Poplar leaf-miner. 
Poplar leaves are frequently mined by a worm which we have been 
as yet unable to identify. The mine has a dark Hue in the middle, and 
is otherwise very characteristic; its form is represented by Fig. 169. 
51. Brachys cerosa Melsheimer. 
Having frequently found this beetle on the leaves of the oak, we 
supposed that it might be a leaf-miner of that tree, but Mr. 0. P. 
Gillette, of the Michigan Agricultural College, states in the Canadian 
Entomologist for July, 1887, that he has reared two fully developed 
specimens of the larvae from the leaves of the poplar. They finish 
their mines in October, and early in the following May the beetles 
appear. The mine is made next to the upper surface of the leaf. 
Larva. — Whitish; broadest at the head and gradually tapering to the tail; jaws 
brown and first segment behind the head with brown rectangular plates above and 
