586 AN INTRODUCTION TO ENTOMOLOGY 



O. With some of the branches of radius of the 

 fore wings coalesced beyond the apex of the 

 discal cell. p. 608 Eucleid^ 



00. With each of the five branches of radius 

 of the fore wings arising from the discal cell. 



p. 655 Hybl^id^ 



HH. Hind wings with less than three anal veins. 



I. Fore wings with two distinct anal veins or with the anal 

 veins partly grown together so as to appear as a branched 

 vein. 



J. Anal veins of fore wings partly grown together so as to 

 appear as a branched vein. p. 613 Psychid^ 



JJ. Fore wings with two distinct anal veins {Harrisina). 

 p. 605 Pyromorphid^ 



II. Fore wings with a single fully preserved anal vein. This 

 is the second anal vein; the first anal vein is absent or 

 represented merely by a fold ; and the third anal vein is 

 short, not reaching to the margin of the wing, or is wanting; 

 usually when the third anal vein is present it is joined to 

 the second anal vein, so that the latter appears to be 

 forked towards the base. 



J. Frenulum present. In most cases, the humeral angle of 

 the hind wings is not greatly expanded. 

 K. The five branches of radius and the three branches of 

 media of the fore wings all present, and each one arising 



separate from the discal cell. p. 653 Thyridid^ 



KK. With some of the branches of radius of the fore 

 wings stalked, or else with some branches coalesced to 

 the margin of the wing. 



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

 siderably longer than elsewhere. 



M. Veins Sc and R of the hind wings seperate, but 



usually connected by a more or less distinct basal 



part of vein Ri. (Microfrenatag.) Pass to Table B. 



MM. Veins Sc and R of the hind wings fused for a 



greater or less distance. 



N. Ocelli present, p. 683 N0CTUID.E 



NN. Ocelli absent, p. 704 Lithosiin^ 



LL. The fringe on the anal angle of the hind wings not 

 considerably longer than elsewhere. 

 M. The basal part of vein Ri of the hind wings, the 

 part extending from radius to the subcosta, ap- 

 pearing like a cross-vein which is as stout as the 

 other veins; veins Sc + Ri closely parallel to the 

 end of the discal cell or beyond, p. 655. Sphingid^ 

 MM. The basal part of vein Ri of the hind wings 

 rarely appearing like a stout cross- vein; when it 

 does appear like a cross-vein, veins Sc + Ri and 

 Rs strongly divergent from the point of union of 

 veins Ri and Sc. 



N. Vein M2 of the fore wings not more closely 



joined to cubitus than to radius, cubitus being 



apparently three-branched. 



O. The basal part of the subcosta of the hind 



wings extending from the base towards the 



apex of the wing in a regular curve. 



P. Vein M2 of the hind wings arising nearer to 



cubitus than to radius; vein Mi of the hind 



wings joined to radius before the apex of 



the discal cell. p. 709 Thyatirid^ 



PP. Vein M2 of the hind wings either wanting 



