50 Journal New York Entomological Society, t^oi. xxv. 



27. Branches of radius normally symmetrical on the stalk of R3+4 as an axis; 



two large accessory cells Epirrita (aO- 



2-j. R, arising far beyond Rb, ist ace. cell minute or absent Venusia (32). 



28. Front rounded out, curving in to the small clypeus below, and quite 



snxoothly scaled, the palpi hardly exceeding it, our species with one 

 accessory cell Euchoeca (33)- 



28. Front rough-scaled or with a conical tuft, or strongly projecting below, 



with the palpi projecting well beyond it 29 



29. Front fully as wide as eyes, the palpi very rough Loxofidonia (34). 



29. Front narrower than eyes 30 



30. Hind wing with a distinct though slight angulation at M3 and notched 



above, with wavy margin ; the antennse deeply laminate. 



Percnoptilota (35)- 



30. Hind wing evenly wavy or rounded 31 



31. Abdomen with small, usually black dorsal tufts on several segments, fore 



and hind wings similarly marked with fine wave-lines ; front and clypeus 

 often extended to a point below, forming a beak with the palpi. 



Eupithecia, Eucymatoge and Orthonama (36). 



31. Abdomen neither tufted nor black spotted in the middorsal line, clypeus 



never triangular, fore and hind wings only exceptionally similarly 



marked with fine wave-lines Hydriomena (series II) (37). 



Females : 

 I. Wingless or with rudimentary wings Operophtera (14). 



1. Winged a 



2. No frenulum, green with two white lines Dyspteris (6). 



2. Frenulum present, not green and simply marked 3 



3. Fore tibia with claw 4 



3. Fore tibia unarmed 5 



4. Palpi beaklike Eucestia (9). 



4. Palpi short, front smooth Marmopteryx (10). 



5. R5 and Ml stalked together from cell in fore wing Zenophleps (15)- 



5. R3 and usually Mj from accessory cell 6 



6. Hind tibiae with end-spurs only 7 



6. Hind tibiae with all spurs 9 



7. Abdomen with small dorsal tufts (easily lost), hind wing longer to apex 



than to anal angle G3amioscelis (20). 



7. Abdomen smoothly scaled, hind wing full as long to anal angle as to apex. .8 



8. Fore wing with a single small accessory cell well before end of discal cell, 



with long oblique udcv Synomila (19). 



8. Fore wing with large or double accessory cell, reaching end of discal cell ; 



udcv obsolete Trichopteryx (7) and Lobophora (12). 



9. Rj apparently a crossvein, extending from ace. cell to Sc. 



Chloroclystis (22). 

 9. Rj free from Sc (or as an aberration very shortly fused with it) 10 



