LEPIDOPTERA 585 



I, Veins Sc + Ri and Rs of the hind wings grown together for a 

 greater or less distance between the apex of the discal cell 

 and the apex of the wing, or in some cases separate but very 

 closely parallel, p. 644 Pyralidid^ 



II. Veins Sc + R, and Rs of the hind wings widely separate 

 beyond the apex of the discal cell. 



J. The fringe on the anal angle of the hind wings con- 

 siderably longer than elsewhere (sometimes not obviously 

 SD in rubbed specimens) ; the spurs of the tibise more than 

 twice as long as the width of the tibiae. (Microfrenatae.) 

 Pass to Table B.* 

 JJ. The fringe on the anal angle of the hind wings not longer 

 than elsewhere or but slightly so; the spurs of the tibias 

 about as long as the width of the tibiae. 

 K. Veins Sc + R, and Rs of the hind wings grown to- 

 gether to near the end of the discal cell (Fig. 734), or 

 anastomosing beyond the middle of the cell (Fig. 730). 

 L. Small moths, chiefly of a smoky black color, with 



thinly scaled wings, p. 604 Pyromorphid^ 



LL. Moths of medium size, and densely clothed with 

 long, woolly hairs, which are light-colored or brown. 



p. 606 Megalopygid.'E 



KK. Veins Sc + Rx and Rs of the hind wings separate or 

 grown together for only a short distance. 

 L. 1st and 2d anal veins of the fore wings united by a 

 cross-vein. 

 M. Accessory cell present (Hypoptinae). p. 603. 



CossiD^ 



MM. Accessory cell absent, p. 613. . . Psychid/E 



LL. 1st and 2d anal veins not united by a cross-vein. 



M. Vein M, of the fore wings arising from the discal 



cell nearly midway between veins Mi and M3. 



N. Vein Mj of both fore and hind wings coalesced 



with vein Cui for a considerable distance beyond 



the end of the discal cell. p. 673. . . . Dioptid^ 



NN. Veins M^ and Cui not coalesced beyond the 



end of the discal cell. 



O. Veins R, and R3 coalesced at base, but 

 separate from veins R4 and R5, which also 



coalesce at base. p. 712 Lacosomid^ 



00. Veins R,, Rj, R4, and Rj united at base. 



p. 727 BOMBYCID.E 



MM. Vein M2 of the fore wings emerging from 

 the discal cell nearer to cubitus than to radius, 

 causing cubitus to appear four-branched. 

 N. Fore wings with an accessory cell. 



O. Moths with heavy, spindle-shaped bodies, 

 and narrow, strong wings, p. 601. CossiD^ 

 00. Moths in which the body is slender and the 

 wings are ample. 



P. Wings ample (fore wings not half longer 

 than wide) ; mouth-parts vestigial, p. 605. 



Dalcerid^ 



PP. Wings more or less oblong, usually 

 twice as long as wide; mouth-parts usually 

 developed with scaled tongue. (Micro- 

 frenatae.) Pass to Table B. 

 NN. Fore wings without an accessory cell. 



*A few of the Eucleidae present these characters; but with these moths the 

 wings are broad and the base of media extends through the middle of the discal 

 cell. 



