178 WILLJAM T. M. FORBES 



cave fasciip. Under side red-browu. Hind wing pale-gray, partly red-brown 

 below. 10 mm. 



The moth Hies in September. The cone is formed by bending down and under 

 a lobe of the food leaf (red oak. etc.). The leaf is eaten through in a series of 

 small holes where the edge of the liap is attached. The larva is whitish with 

 brownish incisures, and occurs early in July. Apparently there is only one brood. 



Southern Connecticut. 



33. G. serotinella Ely. I'alpi with a very small pointed tuft. Ground black - 

 brown; basal half of third segment of palpi yellow; tarsi pale. Fore wing witli 

 numerous, greenish-silvery spots, irregularly scattered and more or less fused, 

 especially so as tp form an outwardly oblique sub-basal fascia and a V-shaped 

 antemedial spot resting on costa (enclosing a spot of the ground color). Apical 

 fringe cut with four yellow bars. Dorsal fringe and hind wing mouse gray. 15 mm. 



The moth occurs in July and August. The larva forms the tip of a leaf of 

 I'runus serotina- into a cone. The cocoon is boat shaped, fiat on top, and is spun 

 in a partly folded leaf. 



Dublin, New Hampshire; East River, Connecticut. Xew York: Ithaca. 



3. ACROCERCOPS Wallengron . 

 (Gracilaria, Coriscium, in part) 



Similar to Gracilaria; hind tibise of the northeastern species with a couple 

 of rows of stiff straight bristles above, about a quarter as long as the length 

 of the tibia?, or somewhat less. Antenna; fully as long as the fore wings, palpi 

 typically with a slight tuft on second segment, large and triangular in A. quin- 

 questrigelln; maxillary palpi minute in some exotic species. Wings about as 

 in Gracilaria; in the fore wing with all veins present, or one dorsal (apparently 

 Cu) lost, as in A. onosmodiclla,. Hind wing often a little more reduced than in 

 Gracilaria, Rj regularly being lost, and M 3 also in A. strifiifinitella. Resting posi- 

 tion with the fore and middle legs displayed as usual, but sometimes with the 

 head appressed to the object on which the moth is resting. 



The caterpillar is of various types, but in all cases it feeds in the cylindrical 

 stage (fig. 121). The transformation to the cylindrical stage is sometimes 

 gradual. The larva- are usually blotch miners, the cocoon, typically, being formed 

 in the mine. Our species belong to various groups of the genus, which is very 

 large in the Orient. 



Key to the species 



1. Inner margin with two large, silvery patches 7. albinotcllc. 



1. Inner margin with a slender silvery streak. 



2. Streak ending a fourth way out; ground color golden .">. onosmodieUr. 



2. Streak ending halfway cut 8. renustellf 



2. Streak reaching to anal angle fi. qum'questriyellc 



1. Inner margin with silvery spots or fasciip only. 



2. Four rounded, white spots on margins 4. boreaseU;:. 



2. Extremely slender white fascia*, alternating with heaver black cues. 



3. Costal and dorsal series at right angles to each other 1. strigifinitell " . 



3. Stripes running acrcss the wing, farther cut on inner margin.. . .3. strigosa. 

 2. Moderate white fasci;r and no black ones. 



3. Ground dull brown; six or seven fasciae straight aerrss the wing. .3. strir/osa. 



3. First two dorsal fasciae lying along the margin; four or five in all; gi- und 



shaded with luteous. . 2. cis'er'.cola. 



