34:8 William T. M. Forbes 



Larva a bast miner on trunks and larger branches of elm; maturing early in the 

 spring. Cocoon on the bark. Moth in June; sometimes abundant. 



Massachusetts to Kentucky and Missouri. 



The stalking of R 4 and R 5 in this species is inconstant, in fact the Cornell Univer- 

 sity collection has a specimen in which R 4 and R 5 are stalked on one side only. 

 Meyrick has based the name mesocausta on specimens in which R^ and R 5 are 

 separate. This appears to be the more usual condition. 



17. A. austerella Zeller. White, with four, parallel, oblique, slightly irregular, 

 dark fasciae; the first usually not reaching the inner margin, the second complete, 

 the third and fourth near the apex, obscurely forked at costa and lying in a 

 fuscous-dusted area. Some brown also on base of costa. Fringe dirty white. 

 9 mm. 



June. 



Maryland to North Carolina, and Kansas to Texas. New York: Otto, Rock City 

 (Cattaraugus County). 



18. A. thuiella Packard. Similar to A. undulatella; the median band .not s® 

 black, and broken into costal and dorsal spots, not oblique; an erect postmedial 

 band. Oblique apical striation grayer, best-marked on the costa. 8 mm. 



June. Sometimes injurious to arborvitse, eating out the tips of the shoots. 

 Canada and Maine to Pennsylvania. New York : Ithaca, Hicksville, Westerly, 

 Long Island. 



11. ZELLEBIA Stainton 



Much like Argyresthia. Ocelli present; third joint of palpi broadly scaled, 

 somewhat blade-like in Z. celastrusella ; vestiture spreading in Z. retiniella and 

 haimbachi, the second joint also quite rough scaled; venation as in Argyesthia; 

 Sc of hind wing short; M 3 wanting, M 2 free. 



In Z. celastrusella the palpi are very rough and the wing has rough scales and 

 tufts as in Xyrosaris Meyrick, but in the latter the antenna is as long as the fore 

 wing, in our species much shorter. Neither of our species is typical of the genus. 



1. Z. celastrusella Kearfott. Grayish, powdered with brown on a pale gray base; 

 the wings loosely scaled and with scattered black dots formed of a single long 

 scale each; head paler; palpi pale in front. Fore wing with a dark fascia at a 

 fourth way from the base; white patches well toward the apex, and opposite each 

 other on costa and on dorsal margin. Terminal line black, fringe dark. A long 

 pencil of dark hair arising from base and extending along the under side of costa. 

 13-16 mm. {Xyrosaris Meyrick.) 



End of May to June. Larva vivid green, cervical shield concolorous, shining; 

 head olive; legs yellower. Webbing leaves together and feeding in terminal 

 twigs of Celastrus scandens, in early spring. Moth resting with the head appressed 

 to the substratum and tail -raised, as in Argyresthia. 



New Jersey; New York (Kearfott); Texas. 



2. Z. haimbachi Busck. M„ of hind wing distinctly nearer Clii than Mi. Wings 

 smooth. Palpi ending in a large loose tuft of spatulate scales. Yellow ochre ; 

 head white; a broad, somewhat diffuse, white longitudinal band through fore 

 wing. Hind wing pearl gray. 10 mm. 



July. Larva on short-needle pine, in June. 

 Wenonah, New Jersey. 



3. Z. retiniella Kearfott. Structure much as in Z. haimbachi. Antennae much 

 shorter than fore wing. Fore wing bright golden, with confused white strise on 

 the disc, the striae formed of scales some of which have yellow-brown and light 

 gray-brown spots and bars. Fringe white, gray-brown at apex. Hind wing white, 

 gray-brown at apex, with white fringe. Head and thorax white, tegulee golden. 

 15 mm. 



July 4. 



Lakehurst, New Jersey. 



