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, ^/a?' expansioM 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. — Aupen leaf folded by a Qraeillaria. — Bridg- 

 ham del. 



Pig. 168.— Aspen leaf folded by Gracil- 

 laria.— WilAer 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 line in the middle, and 

 is otherwise very characteristic; its form is represented by Fig. 169. 



51. Brachya 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. O. P. 

 Gillette, of the Michigan Agricultural College, states in the Canadian 

 Entomolqgist for July, 1887, that he has reared two fully developed 

 specimens of the larvpe 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 



