200 
NORTH AMERICAN NEPTICULIDAE 
mine after the larva has deserted the mine. 1 he bark of old 
mines cracks and often breaks away entirely, leaving the inner 
bark exposed, producing scars which persist for a number of 
years. The larvae are found chiefly on young saplings, but are 
also found on outer branches of trees, wherever the growth is 
imnsiially long and vigorous. 
The larvae are full grown in, Octolier and early November, 
producing moths in May and June of the following year. 
5. Ectcedemia obruteila Zeller 
Trijurcula obridella Zeller, Verb, zool.-bot. Ges. Wien, 316, 1873. 
Ectoedemia obridella (Zeller), Busck, Proe. Ent. Soc. Wash., xv, 103, 1913; 
-xvi, 149, 1914; Dyar’s No. 6226. 
Syn. hosqueella Chambers, Bull. Geol. Surv. Terr., iv, 106, 1878; Busck, 
Proc. Ent. 8oc. Wash., v, 208, 1903; Dyar’s No. 6229. 
Head pale ocherous, sometimes black (Chambers); antennae fuscous, eye- 
caps white. Fore wings pale ocherous, slightly iridescent, and dusted, more 
densely in the male than in the female, with coarse Ijrown scales, which are most 
numerous toward the apex. For a short distance from the base, the costa is 
black, more conspicuously so in the male. Toward the base of the inner mar- 
gin the dusting is least dense. Cilia pale yellowish gray, with marginal row 
of dark scales. Underside of fore wings darker than the hind wings which are 
pale grayish, with paler more yellowish cilia. Legs pale ocherous. Ab- 
domen gray, w ith yellowish anal tuft. 
Locality . — Texas (Boll, Chambers). 
3. OBRUSSA Braun 
Obrussa Braun, Can. Ent., xlvii, 196, 191.5. Type: 0. ochrefasciella Chambers- 
Generic characters. — Eye-cap large. Laliial palpi well devel- 
oped. IMiddle spurs of the posterior tibiae above the middle. 
Fore wings elongate ovate, with jiigum in the female; hind wings 
a little over one-half. 
Venation (Fig. 4 ). — Fore wings; media coalescing with cubitus 
at base, then passing obliquely to radius beyond R2+3, and 
anastomosing with radius to beyond middle of wing. R4 sepa- 
rate. Ml and M2 coalescing for a short distance beyond separa- 
tion of Al and R. AI3 absent. Cubitus becoming obsolete 
beyond its separation from AF Hind wings; media single- 
branched. 
Represented by a single species whose early stages are entirely 
unknown. In the male the row of spines along the costal edge 
of the hind wing is preserved unmodified, except that the individ- 
ual spines are weaker and not curved. 
