LEPIDOPTERA 591 



KK. Wings broad, ample, not falcate; maxillary palpi 

 of folded type, inconspicuous, invisible in Setiostoma. 



p. 625 SXENOMIDyE 



FF. Hind wings with pointed apex and excavated below, rarely 



bifid. (See also FFF.) p. 625 Gelechiid^ 



FFF. Hind wings narrow -lanceolate and pointed or linear, and 

 much narrower than their fringe. 



G. Hind wings lanceolate, though sometimes very small, and with 

 the principal vein running nearly through its center, widely 

 separated from Sc. 



H. Hind wings with a discal cell. p. 621 Elachistid^ 



HH. Hind wings without a discal cell. 



I. Vein Rs of hind wings separating from media near the 



middle of the length of the wing. p. 623 Douglasiid^e 



n. Vein Rs of hind wings separating from media near the 



apex of the wing. p. 634 Heliozelid^ 



GG. Hind wings with vein R closely parallel with or fused to Sc 

 near base. In the broad- winged Gracilariidag, veins Sc and R are 

 fused and the base of vein ]M is preserved, simulating the con- 

 dition in G, but the combined base of Sc and R curves strongly 

 into the lobed basal half of costa, and then approaches or fuses 

 with M at middle of wing, unlike the relation of Sc and R in G. 

 H. Hind tarsi with strong spinules, usually near apices of seg- 

 ments, as well as tibias; posterior legs displayed when at rest. 



p. 634 Heliodinid^ 



HH. Tarsi smooth-scaled, the spinules concealed in the scaling; 

 the tibias often hairy, but rarely {Acrocercops, Epermenia) 

 bristled. 



I. Fore wings with only four veins running from the discal 

 cell to the costa, and five or six to the inner margin. 



p. 631, 632 Yponomeutid^ and Plutellid^ 



II. Fore wings with five veins running to costa, or only four to 

 inner margin. 



J. Discal cell oblique in wing; vein Cuj very short, ninning 

 directly across to inner margin. 



K. Antennas turned forward in repose; fore tibiae 

 slender, with a small epiphysis at the apex or none. p. 620. 



Coleophorid^ 



KK._ Antennae tixrned back in repose; fore tibias with the 



epiphysis conspicuous, and often more than half as 



long as the tibia; the tibis rarely slender. 



L. Hind wings with veins Sc and R usually fused near 



base ; fore wings with a stigma, and with Ri arisi'ng 



near the base of the discal cell and R2 near the apex of 



the cell. p. 628 Blastobasid^ 



LL. _ Hind wings with veins Sc and R not fused ; fore 

 wings with the space between the origins of veins Ri 

 and R2 only three or foiu- times that between veins 



RjandRj. p. 629 Cosmopterygid^ 



JJ. Discal cell not set obliquely in wing; vein Cua nor- 

 mally long and parallel to the medial veins. 

 K. Male antennae heavily ciliate; accessory cell of fore 

 wings extending halfway to base of wing; head with a 

 large, loose, but of ten obscure, semierectile tuft. p. 615. 



TiSCHERIIDiE 



KK. Male antennae rarely ciliate; accessory cell small or 

 absent. 

 L. Palpi minute and drooping; vertex tufted; hind 



wings linear (Bedellia). p. 616 LyonetiiD/E 



LL. Palpi moderate, with fusiform third segment; 



maxillary palpi often well developed and porrect. 



(See also LLL.) p. 617 Gbacilariid.s 



