256 NOTODONTINA 



18. Eye crossed by subantennal liair-tuft . 25. Colotois. 



„ not crossed by tuft . . . .19. 



19. Forewings with transparent discal scar . 22. Selenia. 



,, without transparent scar . . 20. 



20. Forewings with 11 connected with 12 .26. Ennomos. 



„ with 11 free from 12 . . .21. 



21. Posterior tibiae hairy, middle-spurs short or absent 



17. BiSTON. 



,, ,, glabrous, middle-spurs moderately 



long . . . 22. 



22. Face with defined conical tuft . 23. Hygrochroa. 



„ without defined tuft . 27. Gonodontis. 



23. Forewings with 7 out of 9 above middle, 10 out 



of 9 . . .24. Cepphis. 



,, with 7 out of 9 below middle, 10 rarely 



out of 9 near base . 12. Crocota. 



24. Thorax with low double posterior crest 4. Deileptenia. 



,, not crested . . . .25. 



25. Femora hairy . . . .9. Synopsia. 



,, glabrous ..... 26. 



26. Forewings with 10 normally out of 9, and anasto- 



mosing with 11 . 20. Metrocampa. 



„ with 10 out of 11, not anastomosing 



with 11 . . 21. Euchlabna. 



1. Opisthograptis, Hb. 



Face with appressed scales or short tuft. Tongue developed. 

 Antennae in $ filiform or serrate-dentate, ciliated. Palpi rough- 

 scaled. Thorax somewhat hairy beneath. Femora glabrous ; 

 posterior tibiae in c^ more or less dilated, often bent. Forewings 

 in S with -fovea; 10 often connected or anastomosing with 

 12 and 9, 11 out of 10 between connections or usually absent. 



A considerable genus, widely distributed, but most numer- 

 ous in the Indo-Malayan region. 



1. Forewings with ferruginous costal spot . . 2. 



,, without ferruginous costal spot 4. clathrata. 



2. Wings yellow . . . .5. hdeolnta. 



,, not yellow . . . .3. 



3. Forewings with blackish spot on middle of second 



line .... 4. 



,, without such spot . . 3. litumta. 



4. Angulation of second line very obtuse . 2. altemaria. 



„ , ,, nearly rectangular 1. notata. 



