NATURAL SCIENCES OF PHILADELPHIA. 319 



With a basal streak. 

 Fore wings shining ochreous-saffron. 

 5. Basistrigella, with first costal and dorsal streaks unmargined. 



With no basal streak. 

 Fore wings ferruginous brown. 

 3. Desmodiella, ruby tinted at base, with two silvery bands. 



Fore wings silvery. 

 9. Lucetiella, golden toward tip, with a black costal spot and opposite 

 black line. 



\\ An oblique costo-apical white streak or spot. 

 Apex not dusted with dark scales. 

 Fore wings reddish-orange. 



12. Aceriella, with a short dorsal streak near the base, two silvery 

 bands, an oblique dorsal streak near the tip, and a costal spot above it. 

 Apex dusted with dark scales. 



12. Var. Aceriella? 



W\ With dispersed, dark, apical scales. 

 Fore wings reddish-orange. 



With three silvery bands. 

 11. Caryasfoliella, black margin of the second band produced, apical 

 scales on a white ground. 



With two silvery bands. 



13. Guttifinitella, black margin of second band not produced ; a costal 

 and dorsal spot near the tip, 



Fore wings white. 



15. Hamadryadella; branded with shining ochreous-saffron ; irrorated 

 with black. 



With a basal streak. 

 5. Basistrigella, (sometimes,) with four costal and three dorsal slender 

 streaks. 



16. Argentinotella, with five costal and four dorsal conspicuous 

 streaks. 



WW With a median, black, apical streak. 



Fore wings dark brownish-golden. 



14. Crataegella, with a silvery basal streak, black-margined above. 



1. L. 1 u cid i c o s t e 1 1 a. Antennae white. Head and tuft silvery-white. 

 Fore wings, basal portion silvery white to the middle, witha discal pale golden 

 streak from the base, retreating from the costa before reaching the middle of 

 the wing, and somewhat suffused with golden beneath the fold. From the 

 middle to the tip, pale golden, with four costal silvery streaks, dark-margined 

 internally, and two dorsal silvery streaks, the first opposite the second costal 

 streak, and both dark-margined internally ; the first costal streak not decidedly 

 dark-margined. Apical spot, black. Hinder marginal line in the cilia, dark 

 brown ; cilia pale gray. Hind wings shining bluish gray ; cilia gray. 



The larva mines the under side of the maple leaf, Acer saccharinum, in 

 July, Sept., and Oct. The head is pale brown ; body pale green, colored darker 

 by the ingesta. " Fras3" collected into a ball within the mine. The pupa is 

 suspended in a web of silk within the mine. 



2. L. Robiniclla . Antennae dark brown. Front silvery white, tuft dark 

 brown mixed with grayish. Thorax dark brown. Fore wings golden yellow 

 above the fold, and dark cinereous somewhat dusted with blackish beneath it. 

 About the middle of the wing is an oblique, silvery costal streak, black-mar* 

 gined on both sides, extending to the fold ; another beyond the middle, meet- 

 ing nearly in the center of the wing at an angle, a dorsal streak from the inner 

 margin, the former black-margined on both sides, the latter internally ; another 

 costal streak near the tip with an internal circular black margin, opposite to 



1859.] 23 



