180 NOTODONTINA 



21. Abdomen in < with claspers very large, exserted 



12. PHILEREME. 

 with claspers normal . . 22. 



22. Face flat, smooth . . . 20. ASTHENA. 



,, rounded, with somewhat projecting scales . 23. 



23. Abdomen with small seginental crests throughout 



7. EUCYMATOGE. 



not crested, or near base only 16. HYDRIOMENA. 



1. TRICHOPTERYX, Hb. 



Face smooth. Antennae in shortly ciliated. Palpi 

 rough -scaled. Abdomen sometimes crested. Tibial middle- 

 spurs absent. Forewings : areole double. 

 Hindwings in <$ with dorsal folded lobe, 

 veins distorted ; 2 seldom absent, 6 and 7 

 sometimes separate, 8 in connected by 

 bar with cell near apex or rarely with 7 or 

 as in $ , in <j> anastomosing with cell to 

 richopteryx beyond middle or rarely as in 



carpinata <j. A small genus, derived from Lobophora, 



characteristic of Northern temperate regions. The altered 

 structure of vein 8 in the hindwings of the #, and the separa- 

 tion of 6 and 7 (very rare in this family), are due to lateral 

 expansion, intended to compensate for absorption of the dorsal 

 area by the folded lobe; when they occur in the $ also, they 

 afford an instance of the transference of secondary sexual 

 characters through inheritance. 



1. Forewings dull green . . . ... ' 1. viretata. 



not green . . . .2. 



2. Third and fourth fasciae ochreous-brown 3. polycommata. 



not ochreous-brown 2. carpinata. 



1. T. viretata, Hb. 23-26 mm. Palpi long. Forewings 

 dull olive-green, with curved darker striae ; median band and 

 fifth fascia marked with black, striae beyond these with whitish ; 

 a black discal mark. Hindwings grey ; a darker discal dot. 



England, Ayr, Ireland, not common ; C. Europe ; 5, 6, 8. 

 Larva pale greenish, sometimes partly suffused with pink ; a 

 dorsal pink or purplish-crimson line or series of spots ; sub- 

 dorsal line pink, sometimes interrupted; lateral sometimes 

 faintly pink; head brown, often crimson-marked; 13 with two 

 short points : on holly, ffedera, sycamore, etc. ; 6, 7, 9. 



2. T. carpinata, Bkh. (lobulata, Hb.) 28-31 mm. Palpi 



