184 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION 



a basal, diffuse, broad brown line, and an outer much curved brown laair-line. An 

 outer row of dark patches forming a faint broken line. An apical, oblique, whitish 

 patch. Hind edge of fore wings with darker spots add patches than elsewhere. Ex- 

 panse of wings, 1.30 to 1.65 inches. This fine moth occurs all over the United States 

 and on the Pacific coast from California to Oregon. 



257. Endropia pectinaria Guen^e. 



Living on the oak and other trees, a large gray measuring worm, transforming to a 

 large Endropia, with three sharp teeth in the hind wings. 



The transformations of this moth have been observed by Abbot in 

 Georgia, who found it living on the oak and poplar in April. It changes 

 to a chrysalis at the beginning of May, and the moth appears at the 

 end of the same month. 



Larva. — Pale green, with the sutures and sides reddish, a double aiigle bordered 

 with reddish on the second segment, another more salient on the sixth, and finally 

 another on the tenth ; the fifth has on each side a small pointed tubercle. Head and 

 feet concolorous. 



Moth. — The hind wings with a large tail and toothed; the fore wings angular, 

 sickle-shaped. Body and wings pale whitish-ash. Wings thickly covered with fine 

 speckles. Fore wings with three lines, tbe usual inner and outer line, and a third 

 wavy submarginal hair-line. The two inner lines distinct, of even width, a little 

 oblique, not waved; the innermost line situated exactly on the inner third, the outer 

 line on the outer third of the wing. Front edge of the fore wings stained with red- 

 dish on the end of the outer line. Submarginal hair-line wavy, sinuate, reddish, 

 situated half-way between the outer line and the edge of the wing and disappearing 

 below the second median venule, s'calloped between each venule, much more distinct 

 below than above. On the hind wings a single brown line, and traces of a submar- 

 ginal wavy line. Beneath, paler than above, with the lines reproduced beneath, and 

 dull colored ; the third submarginal line on both wings partly obsolete, but clearer 

 than above; fringe reddish. Expanse of wings, 1.50 inches. Ranges from Maine to 

 Missouri and Kansas. 



The parent of this caterpillar, which is found in the United States, 

 north and south, and west as far as Kansas, may be known by the 

 three well-marked teeth on the apical half of the hind wings, by the 

 clear border of the wings, and by the dark clear lines on the under side. 



The caterpillar lives in Georgia on the oak and other trees, according 

 to notes left after his death by Abbot, and is of a pale yellowish gray, 

 with a dorsal lozenge like mark. The fourth segment is darker, and on 

 the back of the eighth, ninth, and tenth are also two obscure marks 

 bifid anteriorly on the first, and carrying a blackish angle on each ex- 

 tremity of the second. The head and feet are concolorous. It is found 

 in Georgia in May and June, and the moth is disclosed towards the end 

 of this last month. A second generation enters the chrysalis state 

 towards the middle of July to appear as moths in the beginning of 

 j^ugust. In the Northern States the species is undoubtedly only 

 single-brooded. 



Besides these geometric caterpillars, that of Metrocampa perlaria 

 Guenee should be looked for on the oak, as its closely allied European 

 congener {M. margaritata) feeds on the elm, hornbeam, birch, and oak. 



