LITHOPHANE. 245 



2394. Lithopliane socia. 



Noctiia socia, Eott. Naturf. ix. p. 142 (1776) ; Staud. Cat. Lep. pal. p. 210. 

 Noctua pctrificafa, Scliiff. Wien. Verz. p. 75 (1776) ; Fabr. Mant. Ins, 



ii. p. 182 (1787) ; Diip. Lep. Fr. iii. p. 370, pi. 34. f. 3 ; Steph. III. 



Brit. Ent., Haust. ii. p. 171, pi. 23. f. 1. , 



NocfuapeMjicosa, Hiibn. Bur. Schmett., Noct. f. 239 (1827). 

 Lithophane petrolignca, Hlibn. Verz. p. 242 (1827). 



Head and thorax greyish oohreous tinged with rufous ; palpi 

 witli black lateral stripe ; frons with blacli bar ; tegulae with black 

 lino near tips ; patagia with some black scales near upper edge ; 

 tibiae streaked with black ; abdomen greyish ochreous dorsally 

 tii)ged with brown, ventrally with rufous. Fore wing greyish 

 ochreous tinged with rufous, the inner half often suffused with 



Fig. 80. — Lithophane socia, (^ . \. 



purplish fuscous ; a brown streak below base of cell ; subbasal 

 line represented by a slight oblique pale striga from costa ; 

 antemedial line represented by double black points on the veins 

 with traces of a pale dentate line beyond them strongly angled 

 outwards in submedian fold ; claviform absent ; orbicular and 

 reniform indistinct, pale, the former very oblique elliptical, the 

 latter with its lower edge defined by a pale streak with brown 

 below it ; postmedial Hue represented by a double series of black 

 points on the veins, strongly bent outwards below costa, excurved 

 to vein 4 and strongly incurved and forming a pale lunule in sub- 

 median fold ; subterminal line indistinct, pale, somewhat dentate, 

 angled outwards to termen at veins 4, 3, and with slight dentate 

 brown marks before it at middle and in submedian interspace, the 

 extremity of the veins with dark streaks. Hind wing ochreous 

 whitish suffused with brown ; cilia whitish at tips ; the underside 

 pale, the costal and terminal areas irrorated with, brown, a discoidal 

 lunula and oblique postmedial line incurved to costa. 



Hah. Britao, Leech Coll. ; Feance ; Germany, ZcUer, Frey, and 

 Leech Colls. ; Austria, Zeller and Leech Colls. ; Hungary ; Switzer- 

 land, Frey Coll. ; Italy ; Russia, Livonia, Zeller Coll., St. Peters- 

 burgh, Zeller Coll. ; W. Siberia, Altai ; E. Siberia, Amurland, 

 TJssuri. Exp. 42-46 millim. 



Larva. Meyr. Brit. Lep. p. 51 ; Barrett, Lep. Brit. vi. p. 28, pi. 235. f. 2. 



Pale green ; dorsal and lateral lines white ; head black. Food- 

 plants : Ash, Oak, and Tilia. 5-7. 



