188 THE STUDY OF INSECTS 



and when such moths are at rest with the antennae folded back this seg- 

 ment covers the eye like a cap. 



SIMPLIFIED KEY TO FAMILIES TO LEPIDOPTERA* 



A. Hind wing with eleven veins (counting along the margin) besides anals. 



B. Expanse' over i inch; mouth-parts rudimentary, p. 192 Hepialid^e 



BB. Expanse about .'. inch; mouth-parts functional. 



C. Mouth-parts for biting; middle tibia unarmed, p. 192 . . . . MlCROPTERYGIDjE 

 CC. Mouth-parts for sucking (the usual spiral tongue), middle tibia ending in a 



single spur. p. 192 Eriocraniidje 



AA. Hind wing with only seven veins (or less) besides anals. 



B. Membrane of hind wing lanceolate or linear, narrower than its own fringe. 

 C. First joint of antenna? very large and spoon shaped, completely covering the 

 eye when folded back (an "eye-cap"). Cell of fore wing at least fully 

 formed; palpi rudimentary, drooping, apex of fore wing sharply bent up or 



down. p. 202 Lyonetiid/E 



CC. No eyecap. 



D. A row of bristles on outer side of labial palpus (besides the usual hair and 

 scales). Maxillary palpi usually conspicuous at base of tongue (between 

 labial palpi), and folded, but absent in common clothes-moth. Head very 

 rough. 

 E. Wing-membrane with microscopic spinules between the sockets of the 

 scales; female with piercing ovipositor; Sc of hind wing usually ap- 

 parently forked into equally stout branches at base, or very stout; 

 antenna smooth-looking (either with both rows of scales on each seg- 

 ment lying flat, or finely pubescent) or else longer than fore wing. p. 195 



InCURVARIIDjE 



EE. Wing-membrane not spinulated; female with an extensible, tubular, 

 soft and hairy ovipositor; Sc of hind wing apparently simple, connected 

 by a weak vein to base of R or none; antenna with outer whorl of 

 scales on each segment usually raised; rough-looking, not longer than 



fore wing. p. 199 Tineid^e 



DD. No bristles distinct from the usual hair and scales. Maxillary palpus 

 inconspicuous, or projecting straight forward. 

 E. Fore tibia without an epiphysis (antenna-cleaner) on its inner face. p. 204. 



COLEOPHORID^E 



EE. Fore tibia with an epiphysis along its middle part. 



F. Fore wing with four veins running from discal cell to costa, and five 



or six to below apex (inner margin), p. 207 Yponomeutid/E 



FF. Fore wing with at least as many veins running to costa as to inner 

 margin from discal cell. 

 G. Hind tibia hairy above; cell of fore wing very large, with an ac- 

 cessory cell cut off from it by a weak vein. p. 202 . .Tischeriid^e 

 GG. Hind tibia smooth-scaled, or with a regular series of bristles; 

 cell of fore wing narrow, accessory cell (1st R3) not distinguishable. 



p. 203 Gracilariid/e 



BB. Hind wing (membrane) notched below apex, frequently narrower than its own 



fringe, p. 206 Gelechiid,e (part) 



BBB. Hind wing divided in 3 feathers, p. 217 Pterophorid^e 



BBBB. Hind wing broad, not notched, and broader than its own fringe. 

 C. Antennae swollen toward tip (clubbed), no frenulum. 



D. Bases of antenna? separated by a space wider than their own thickness, 



fore wing with all branches of R, M, and Cu, (10 in all) present and arising 



separately from discal cell. 



E. Large butterflies, thorax much wider than head. p. 258. . . MEG ATH YMIDjE 



EE. Medium or small butterflies, expanding rarely over 2 inches; head 



wider than body. p. 259 Hesperiid/E 



DD. Antenna? closer together at base, branches of R partly stalked or united, 



there being only 9 (usually 8 or less) veins arising separately from discal 



cell. 



E. Fore wing with 3d A short and curved but running down free to inner 



margin, hind wing with only I anal. Cu apparently 4-branched. p. 262. 



PAPILIONID.E 



* This key was drawn up by Dr. W. T. M. Forbes. 



