186 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



The moth. — Of a uniform clear fawu-color, without the usual spots aud speckles 

 preseut in other species of the genus; a basal, brown hair-line bent outward acutely 

 on the median vein ; a broad, diffuse, dark median band common to both wings. The 

 extradiscal line is dark, finely scalloped, curved outward below the costa.and sweep- 

 ing inward below the first median venule; beyond this line both wings are deeper 

 fawn-color. At a little distanee below the costa, and nearer the extradiscal line than 

 the outer edge of the wing, is a conspicuous angular, clear, white spot. Fringe dark, 

 the scallops filled with whitish scales. Hind wings like the anterior pair, though the 

 extradiscal line is not sinuous, but curved regularly outward. Beneath, paler than 

 above ; the median band is distinct, and the extradiscal line more or less so ; the tints 

 are much as above. The wings expand 1.40 inches. 



260. Therina fercidaria Hiibner. 



This moth was bred by Abbot in Georgia from the silver- bell tree 

 {Ralesia dlptera), but Dr. Riley has reared it from the live oak iu 

 Florida. This is our most common species of the genus in the Eastern 

 United States. It is at once known by the much-speckled wings and 

 the ocherous-bordered, blackish lines. It varies greatly in the distance 

 apart of the two lines, which in the fore wing are in some twice as wide 

 apart as in others. The species is exceedingly variable. 



At Esquimau, Vancouver Is., "all the oaks were stripped by the 

 larvfB of Therina fervidaria, and their trunks and branches were 

 paved with the handsome Geometrid moths in September." (James 

 J. Walker, Ent. Month. Mag., Aug., 1888, p. 65.) 



Larva. — Head scarcely as wide as the prothoracic segment, the latter not so wide 

 as the body behind. Body of uniform thickness, with no tubercles. Head smooth, 

 slightly divided above, rounded and smooth ; pgi,le, with seven black dots on each 

 side. Body and head pale yellowish ash ; with two dorso lateral blackish longitudi- 

 nal stripes, and another stripe below on each side ; the body elsewhere with fine, more 

 or less interrupted, black lines, and some deep ocherous ones. Between the two 

 dorso-lateral lines are four more or less interrupted fine lines. Length 38 to 40™™. 



Pupa. — Rather slender, whitish, slashed and spotted with brown. (Described 

 from Abbot's manuscript drawing.) 



Moth. — Pale ocherous ; head and front of the thorax with the antennse deep ocher- 

 ous. Wings densely speckled with smoky spots ; well angulated, the angle on the 

 tore wings often acute, on the hind wings forming a slight tail. Outer line dark 

 brown, bordered externally with ocherous. Inner line a little curved, and situated 

 either on or a little within the inner third of the wing. Discal dot dark, distinct, 

 sometimes wanting on the hind wings. Outer line sinuate or zigzag, varying greatly, 

 the angle on the first median venule being slight or very marked on both wings. 

 On the hind wings a single line only. Beneath, much paler ; the lines re-appear, but 

 are diffuse and smoky. Expanse of wings 1.50 inches. 



261. Therina endropiaria (Grote and Rob.). 



This moth has been raised from caterpillars found feeding on the oak 

 at Amherst, Mass., by Mr. L. W. Goodell. It pupated September 4, 

 just beneath the surface, and the moth emerged May 19 following 

 (Can. Ent., xi, 194). It has also been bred by the U. S. Entomologist 

 from specimens which I collected in April at Crescent City, Fla., from 

 the live oak. The larva spun a slight cocoon between leaves at Wash- 

 ington April 27, and the moth emerged May 19. 



