LITHOSIAK^. 81 



through. Scceoclora to have given rise to the larger groups of genera, 

 the MiUochrista-^vow^ retaining vein 5 in both wings, whilst the 

 typical narrow-winged i/e«o«-group has lost vein 5 of both wings 

 and often vein 4 also. 



The larvae are of the normal Arctid type with all the prologs 

 present, and are mostly lichen-feeders. 



Key to the Genera. 



A. Fore wing with vein 5 absent. 

 a. Hind wing with vein 5 absent. 

 a^. Fore wing with vein 4 absent. 

 a^. Hind wing with veins 3, 4 coincident. 



a?. Fore wing with vein 2 stalked witli 3 Neoblavia, p. 105. 



b^. Fore wing witli vein 2 from cell. 

 a^. Fore wing with vein 6 stalked with 7, 8, 9 ; 

 11 from towards end of cell. 

 a^. Fore wing with vein 11 anastomosing 



with 12 Lepista, p. 104. 



b". Fore wing with vein 11 free. 

 a^. Fore wing with vein 10 stalked with 6, 



7,8,9 Meteura, p. 123. 



b^. Fore wing with vein 10 from cell Stenaulis, p. 124. 



b^. Fore wing with vein G from below angle of 

 cell, 11 from middle of cell, 

 rt'. Fore wing with vein 2 i'rom towards end 



of cell, obliqne Blavia, p. 105. 



b\ Fore wing with vein 2 from middle of cell, 



curved at base Parablavia, p. 125. 



b-. Hind wing with veins 3, 4 stalked. 

 «^. Fore wing with vein 2 from near angle of 



cell; 6,7, 8,9 stalked SozusA, p. 128. 



6^. Fore wing with vein 2 from middle of cell, 

 curved at base. 

 a*. Palpi upturned ; fore wing with vein 7 from 



8 beyond9 Chrysoscota, p, 109. 



6*. Palpi porrect ; fore wing with vein 7 from 

 8 before 9. 



a'. Proboscis aborted, minute Crambidia, p. 126. 



6'. Proboscis fully developed. 

 fl°. Fore wing with vein 11 anastomosing 



with 12 Phjeosia, p. 128. 



¥. Fore wing with vein 11 free Macrosia, p. 129. 



6'. Fore wing with vein 4 present. 

 cr. Hind wing with the discocellulars and veins 3 



to 8 absent Tvlanthes, p. 123 



6-^. Hind wing with the discocellulars and vein 6 



absent Hestiarciia, p. 95. 



c^. Hind wing with the discocellulars and veins 3 

 to 8 present. 

 a^. Hind wing with vein 2 stalked with 3. 

 a*. Fore wing with veins 6, 10, 11 stalked with 



8, 9 Rhanghana, p. 106 



b^. Fore wing with veins 6, 10, 11 from cell ... Lambula, p. 97. 

 b^. Hind wing with vein 2 from cell. 

 «i. Fore wing with vein 8 stalked with 7. 

 a°. Fore wing with vein 9 stalked with 7, 

 from areole or absent. 

 a'^. Fore wing with vein 7 from 8 beyond 9. 

 ft'. Fore wing with vein 2 curved at base. 

 TOL. II. G 



