LITHOSIIN^E. 39 



Subfamily LITHOSIIN^. 



Moths of diurnal or crepuscular habits ; in the typical section 

 the fore wing is very long and narrow, and both wings have lost 

 some of their veins. Proboscis present. Mid tibiae with one pair 

 of spurs ; hind tibiae generally with two pairs. 



Larva sparsely covered with hair and forming a slight coccoon ; 

 most of the typical section being lichen-feeders. 



Key to the Genera. 



a. Fore wing long and ample, the outer margin 



oblique. 

 a'. Fore wing with an areole. 



a 2 . Fore wing with the areole long. 



a 3 . Palpi upturned, the 2nd joint reach- 

 ing vertex of head. 

 a 4 . Palpi with the 3rd joint long and 



spatulate 1. ELIGMA, p. 43. 



b*. Palpi with the 3rd joint much 



shorter and acute. 

 a 5 . Fore wing with the apex and 



outer margin rounded 2. MIGOPLASTIS, p. 44. 



b 5 . Fore wing with the apex pro- 

 duced, the outer margin straight. 3. DlLEMERA, p. 45. 

 b s . Palpi with the 2nd joint not reach- 

 ing vertex of head. 

 a 4 . Hind wing with vein 3 from some 



way before the end of cell 7. CUROBA, p. 52. 



& 4 . Hind wing with vein 3 from the 



end of cell 6. ARGINA, p. 50. 



b z Fore wing with the areole short. 



a 3 . Hind wing with vein 8 given off from 



7 near end of cell 5. SECUSIO, p. 50. 



b 3 . Hind wing with vein 8 given off from 



7 before middle of cell 4. NYCTEMEBA, p. 46. 



b' . Fore wing with no areole. 



2 . Fore wing with vein 10 stalked with 7, 



8, 9 9. TATARGINA, p. 54. 



6 2 . Fore wing with vein 10 from the cell. . 8. CAST ABA LA, p. 53. 



b. Fore wing long and narrow ; the outer mar- 



gin short. 

 a'. Both wings with vein 5 present. 



a 2 . Hind wing with vein 5 from above angle 



of cell. 

 a 3 . Hind wing with veins 3 and 4 from 



a point 10. DEIOPIA, p. 54. 



3 . Hind wing with veins 3 and 4 

 stalked. 



a 4 . Fore wing with an areole 12. KERALA, p. 62. 



b*. Fore wing with no areole. 



a 5 . Fore wing with vein 10 from the 



cell 11. CYANA, p. 56. 



b'\ Fore wing with vein 10 stalked 



with 7, 8, 9 14. ADREPSA, p. 64. 



