MEMOIKS OF THE NATIONAL ACADEMY OP SCIENCES. 137 



Ichthyura brucei H. Edwards. 

 (PL III, figs. 23-25.) 



Ichthyura bnicei, li. Edw., Eiit. Amer., i, p. 17, April, 188.5. 



Dyar, Eut. News, iii, ji. ti, Jan., 1892. 



Kirby, Syn. Cat. Lep. Het.. i, p. 611, 1892. 



Pack.. Eiit. News, iv, p. 79, March, 1892. 



Dyar, Eut. News, iv, p. 170. May, 1893; Can. Eut., xxiv, p. 18(1, May, 1892, 

 IcJithi/itra muUnoma, Dyar, Can. Eut., xxiv. p. 179, July, 1892. 

 Mc'Uilojiha hi-iivei, Neiim. and Dyar, Can. Eut., xxv, p. 123, May, 1893; Trans. Anier. Eut. Soc, xxi, ji. 191, 



1894; Jonrn. N, V. Eut, Soc, ii, p. 115, 1894, 

 Melalopha alcthe'Soam. and Dyar, Can. Eut., xxv, p. 122, May, 1893. 



Larva. 



Diinr. Psyche, vi, p. 403, Eeb., 1893. 



Moili. — I will first copy Mr. Edwards's description of this form, and tlien add some observa- 

 tions of my own : 



Ground color of primaries sordid white, with the liues and marks rich brown. X basal aud subbasal line, the 

 former whiti-sh, edged with brown, and dentate in the middle, the latter almost straight. Beliiud the middle is a 

 broad brown shade through which from costa to internal angle runs a clear white line, which on costa is broadly 

 produced iuto the distinct white mark usual in the genus. Between this aud the margin a row of seven brown spots, 

 iu the middle of which is a brownish (doud resting on posterior margin, which with the friuge is lirowuish. 

 Secondaries wholly mouse-color; thorax sordid white at the sides, the center broadly brown. Abdomen dull sordid 

 white; antennic and palpi brown, the shaft of the former whitish. Underside mouse-color, with darker bent 

 median baud common to both wings, and the white costal mark on ijrimaries indicated by a pale dash. 



I. bntccl differs from T. apicdlis {tniu) in the V being abont one-lialf as wide, the base of the 

 inner arm of the V ending just abont the middle of the wing, hence the four lines are much more 

 jiarallel to each other than in I. apicaUs or I. inclu.sa. In J. hrucei the oblique costal white mark 

 is less sinuous and in var. muHnoma less bent behind the costa than in hrucei. 



Grixjfaphical (listribution. — Franconia, N. II. (Mrs. Slosson); Brunswick, Me. (Packard, Mus. 

 Comp. Zool.); Kittery, Me. (E. Thaxter); Plattsburg, N. Y. (Hudson); Colorado (Bruce, tide 

 Edwards, French). 



Var. miiltiioma Dyar (PI. Ill, fig. 20). I regard this as a dark variety of I. brucei. The 

 markings of a male kindly loaned me by Mr. Dyar are identical in ])ositiou with those of a si)ecimen 

 of I. brucei from Franconia, N. H.; it only difl'ers in the much darker colors. The basal line is 

 widely dislocated in the same way. In my J. hrucei the fourth or outermost line is situated a little 

 nearer the outer edge of the wing, and the incomplete V mark is a little narrower than in lu ultnoma, 

 but this is a common variation. In size, in the marginal dark spots, and the subapical reddish 

 orange patch the two forms are identical. 



First larral slar/c. — Head round, shining black, with a few hairs; width, 0.5 mm. Body somewhat flattened, 

 with long pale and black hairs rising singly from large concolorous tubercles; color sordid grayish, tinged with dark 

 vinous on joints 2, 5, 7, 8, 11, aud 12 over the dorsum. Feet normal, the thoracic dark, the abdominal eoucolorous with 

 the body. As the stage advances the whitish spaces on the back become ne.arly white and the piliferous tubercles 

 come out black and distiuct iu three rows ou each side. At the end of this, and of each following stage, the larva 

 spins a house of thread .aiul leaves in which it molts, aud in which it remains during the succeeding stage, wheu uo^ 

 eating. The larva' are solitary. 



Second stage. — Head as before; width, 0.9 mm. Body flattened, with deep segmental incisures; piliferous 

 tubercles large, concolorous at first, but later black; setip short, black. Color blackish vinous, except the dorsum 

 of joints 3, 4, 6, 9, 10, and 13, which is greenish white, containing tubercle 1 aud a very narrow dark dorsal line. The 

 anal plate (i. e., joint 14 or the tenth abdondnal segment) is viuous. Lateral and subveutral tubercles pale. Thoracic 

 feet black. 



Third stage. — Head rounded, me<lian suture deep, shiny black, hairy ; wi<lth, 1.8 mm. Warts r.ather large, each 

 with a hair, aud other somewhat shorter hairs' arise from the body. Color vinous black with pale yellow dorsal 

 patches im joints 3, 4, 6, 9, 10, and 13 anteriorly, iuclosing warts i and ii. A dark dorsal line, each side of which 

 are a few yellow nmttliiigs ou the dark segments; subveutral warts largely yellow, the others concolorous -n ith 

 the markings, except row i, which is dark on the yellow segments. Seta; all blackish. Later, joints 5 and 12 are 

 Been to be a little enlarged dorsally ; a narrow, broken, ■waved line appears along warts i in the yellow markings; 

 the yellow patch on joints 9 and 10 extends faintly on joint 11; there is a broken, irregular, yellow, superstigmat.al 

 line, distinct only ou the yellow-marked segments, and some rather more continuous yellow mottlings along the- 

 Bubstigmatal ridge. 



