88. 



This species differs from the others by its large size and simple antennse. 

 It will undoubtedly be found in the mountainous and boreal regions of North 

 America, as it seems to be common in Newlbundland and also in Labrador, 

 and can scarcely be regarded as an imported species. My examples do not 

 differ materially from European ones. Its range in Europe is set down by 

 Staudinger as follows : Northern and Central Europe ; Piedmont ; Ural Mount- 

 ains ; ! Armenia; Amur; Lapland. 



To the synonyms given above may be added the following from Guende, 

 which I have Ijeen unable to verify : ventilata Fabr. 226, autumnrita 132, 

 inqduinata 131, (juadrifasciata 133, ajfiniata 134, carpinata 135 1 Bork., 

 inscriptata T)ono\., Jiitibr lata Haw., neglcclata Steph. It is called in Europe 

 the November moth. 



Larva. — "The head of the caterpillar is rather narrower than the body, 

 and not notched on the crown; the body is stout, velvety, and cylindrical; 

 the colour of the Lead is dull-green, the mouth tinged with purple; the body 

 is apj)le-green above, but liable to great variation, purple markings sometimes 

 appearing on all the segments; the back of the second segment, and a median 

 line on the tenth, eleventh, and twelfth segments, are often of this colour, and 

 the thirteenth segment is generally tinged witli purple ; there is, moreover, a 

 white stripe just below the spiracles ; the body is glaucous or blue-green ; 

 the legs are pale transparent-green, the claspers of nearly the same colour, 

 but often tinged or blotched with purple. It feeds on white-thorn, black- 

 thorn, horn-beam, sloe, oak, and almost every forest tree, and is full-fed in 

 June." — Newman's British Moths, 109. 



THERA Stephens. Plate 1, fig. 5. 



TtysKtroma Hiibn. (in part), Veiz., 338, 1818. 



I'lhiryii lliibu. (in part), Verz., 335, 1818. 



Chesias Treits. (in part), Scbui. Eur., vi (i), 330, 1827. 



Dup. (in part), I^ep. France, viii (v), 407, 1830. 

 Tlicm Stopb., 111., iii, 271, 1831. 

 Cidaria Boixd. (in part), Gen. ot Inilex, 213, 1840. 

 Chcuitw Hoisd. (in part), Gen. ct Inilex, 213, 1840. 

 Mchinlhia Boisd. (in iiart), Gen. et Index, 217, 1840. 

 Lareulia H.-Scb. (in part), Scbm. Eur., iii, 141, 1847. 

 Them Stopb., Cat. Br. Lep., 10(5, 1850. 



Gucn., Pbal., ii, 370, 1857. 



Walk., List Lep. Br. Mn,s., xxiv, I'JCO, 1802. 



^ ■ — Head rather fuller and wider in front than in Petropliora. Antennae 

 and \yd\\)\ as in Pdroplioid, the latlcr l)eiug long and pointed, rather bushy, 



