492 

 THERINA Hiibner. Plate 6, fig. 1. 



Therina liUbn., Voiz., 283, 1818. 

 jmopia Treits. (in part), Scbm. Eur., vi (i), 89, 1827. 

 Metrocampa Dup. (in part), Lep. France, vii (iv), 122, 1829. 

 EUopia Sti ph., Noniencl. Br. Ins., 43, 1829. 



Steph., 111., iii, 177, 1831. 

 Metrocampa Boisd. (iu part;, Gen. Ind., 181,1840. 

 Dnp. (in part), Cat., 217, 1844. 

 H.-Sch. (in part), Scbm. Eur., iii, 39, 1847. 

 EUopia Stepb., Cat. Br. Lep., 1U8, 1850. 



Lederer, Verb. Bot. Zool. Ges. Wien, 175, 1853. 



Guen., PUal., i, 129, 1857. 



Walk., List Lep. Het. Br. Mns., xs, 158, I860. 



Scales of the vertex rather long ; those of the front short and closely 

 iipi)ressed. Mandibles and labrum long, the bases much exserted beyond 

 the front. Palpi very slender, acute, slightly ascending; the third joint, 

 which is as broad as the second joint, surpasses the front; the first and 

 second very narrow. Antennae with very lung pectinations; in the female, 

 simple. Thorax slender. "Wings thin and broad. Fore wings with the 

 costa convex, especially on the apex. Outer margin bent on the second 

 median venule, hardly angulated, somewhat excavated between the bend 

 and the apex; in the female, more excavated and angulated. Hind wings 

 with the internal angle rectangular, jjassing a little beyond the tip of the 

 abdomen. Apex much rounded. Middle angle obtuse, more acute in the 

 female than in the male. Venation: costal region very wide; two subcostal 

 cells, the inner lozenge-shaped, long and narrow, the outer irregularly oblong ; 

 the posterior discal venule partly obsolete, much curved on the obsolete 

 portion. Legs very slender; hind tibise not thickened. Spurs slender; 

 terminal pair one-third as long as the first pair. Tarsi two-thirds as long as 

 the tibiae. Male abdomen very slender, with a slight tuft ; female slender, 

 very obtuse. Coloration : pale ochreous, very thinly scaled, semi-transparent. 

 An inner and outer line, the outer straight, or angulated inward below the 

 costa and on the fourth median venule. 



While very similar to Metrocampa in the form of the wings, the antennae 

 are more plumose, and there are two subcostal cells, where there is none in 

 Metrocampa. The wings of the male are more angular than in the female in 

 this genus and in Metrocainpa, while the reverse is the case in Sicya^ Hetero- 

 locha, and Opisthograptls. 



Larva. — "Caterpillars cylindrical, without ventral fringes, having ten 

 comj)letc feet, and l)esid('s an eleventli shorler.or rudimentary pair ; body 



