192 LEPIDOPTERA. 



We have four species, readily recognised. 



A. Fore wings unicolorous. 



B. Fore wings gi-eeu. H. viridana. 

 B^. Fore wings yellow. H. iderana. 

 W. Fore wings olive-brown or reddish-brown. II. cihurnana. 

 A'-. Fore wings pale umbreons, with two brown spots. 



//. forstcrana. 



3. H. forsterana, Fah.\ adjunctana,?'/'. (?/(.— E.xpanse 

 of male | to 1 inch, female 1 J inch (21—28 m.m.). Fore wings 

 very broad ; pale grey-brown with two round brown spots 

 near the costa, and usually one above the anal angle. 



Antennas, palpi, and head dark umbi-eous ; thorax grev- 

 brown; abdomen pale grey-brown, the anal tuft broad, 

 mouse-colour. Fore wings unusually broad : costa strongly 

 ai'ched, not folded, but its edge a little uplifted near the 

 base ; apex bluntly rounded ; colour glossy grej'ish-umbreous 

 with two i-ounded or partly-rounded dark-brown spots on 

 the costal margin, and beneath them an unibreous shade or 

 rounded spot, edged by a slender bi'own line, representing an 

 ill-defiued central band ; cilia coucolorous. Hind wings ample, 

 leaden-brown ; cilia I'ather whiter. Female usually larger ; the 

 fore wings more elongated and pointed, othei-wise similar, 



Underside of the fore wings leaden-brown, with the costal 

 sjiots repeated, and between them a marginal dash of pale 

 brown. Hind wings pale smokj- brown. 



There is some slight variation in the ground colour in 

 specimens from the Eastern Counties, it being commonly 

 more grey. Examples from Scotland are commonly smaller, 

 sometimes very much so. 



On the wing at the end of June and in July. 



Larva aa inch long, plump, not very active, nearl}- cylin- 

 drical ; dirty pale green, more grey on the back, with indis- 

 tinct shining green raised dots ; or dull whitish-green, with the 

 dorsal region slate-grey and the spots dull white ; head black ; 

 eyes brown ; dorsal plate pale yellowish-brown, with two 



