224 MEMOIRS OF THE XATIOXAL ACADEMY OF SCIE]NXES. 



Heterocampa inanteo (Duubleilay). 

 (PI. V, fig. 1 <?; VII. fig. 21 i.) 



Lnrhmrrus manteo Donbleday, Entomologist, p. 58, Jan., 1841. 



Harris, Ent. Corresp.. p. 134, 1869. 

 Helerocumpn maiitio Walk., Cat. Lej). Het. Brit. JIns., v, p. 1024, 1855. 



Tudaiia citierascens Walker, Cat., Lei). H^t- Hr. Mus., v, p. 991, 1855. (Fide Grote and Rol>.). 

 Heterorampa manteo Morris, Synopsis Lep. N. Aruer.. p. 240. 1862. 



Heterocampa siibalbicans Grote, Proc. Ent. Soc. Pliil.. iii, p. 336, Dee., 1863, pi. 8, fig. 2 (a good figure); New 

 Check List N. Amer. Moths, p. 19, 1882. 

 Packard, Fifth Eep. U. S. Ent. Comm., p. 158, 1890. 

 Smith, List Lep. Bor. Amer., p. 31, 1891. 

 Kirby, Syn. Cat. Lep. Het. Br., i, p. 564, 1892. 

 Heterocampa manteo Neum. and Dyar, Trans. Amer. Ent. Soc., xxi, p. 206, 1894; Journ. X. Y. Ent. Soc., li, 

 p. 117, Sept., 1894. 



Larva. 



(PI. XXIX, figs. 2-10.) 



Doubleday, Entomologist, p. 58, Jan., 1841. (TTneolored figure of mature larva, plate facing p. 60, fig. 6; 



pupa, fig. 7.) 

 Comstock (J. H.), Rep. U. S. Dept. Agr. for 1880, pp. 2.59, 260, 1881. 

 Elleij, Fifth Rep. U. S. Ent. Comm., pp. 158, 1.59, 1890. 

 Packard, Fifth Rep. U. S. Ent. Comm., p. 1,58, 1890. 



Proc. Bost. Soc. Nat. Hist., xxiv, pp. 545-548, 1890. 



Moth. — Tliree S , two 9 (and other.s seen). TJoifonnly pale ash-gray, with three wavy diffuse 

 darker Hues erossiug the fore wings, and a large, heavy, black discal mark, becoming in rubbed 

 specimens two twin black dots inclosed in a pale ash spot. (Two very fresh and distinctly 

 marked $ from the United States National Museum used in this description.) Male antennte 

 moderately well pectinated, but less so than in most of the species. Head and thorax light 

 ash-gray; thorax behind over the mesoscutum darker. Fore wings ash-gray, varying from pale, 

 almost whitish, ash to a darkish ash, and crossed by four usually distinct, deeply scalloped, dark 

 lines, the scallops more or less tilled in with pale gray. At the very base of the wings a short line 

 composed of one scallop, which is deflected on the cubital vein and passing out along the 

 internal vein becomes confluent with the second line. This second line is double, consisting of 

 two ])aralle], four-scalloped, dark lines, which pass straight across the wing, ending the same 

 distance from the base both on the costa and internal edge. A large,- very conspicuous, 

 transversely oblong, black di.scal spot, which in old rubbed specimens -usually appears as two 

 thin black dots inclosed in a pale area, and which is diagnostic of the species. Extradiscal line 

 double, composed of about ten scallops; where it ends on the costa dislocated and set in from the 

 subcostal portion. A little more than halfway from this to the edge of the wing is a dark, 

 sharply zigzag, diffuse line. A marginal row of about seven distinct black dots. 



Hind wings dark mouse colored, with a faint, diffuse, whitish line, and a du.sky patch on the 

 internal edge. 



Underside of the fore wings like the upper side of the hind wings, with the costal edge on 

 the outer third pale, with four dark spots. Hind wings sordid wliitish; outer edge dusky, like 

 the fore wings. Fringe pale gray, with the veuular spots alternating with the more distinct 

 marginal dots. 



Hind legs very hairy, with two pairs of tibial spurs nearly equal in size. 



Expanse of wings, S -tO-io mm., 9 -43 mm.; length of body, S 21-23 mm., 2 20 mm. 



This is the most common species of the genus, being sometimes abundant enough to be 

 actually destructive to oaks in the Southern States. The species differs from the otliers of the 

 genus in the large, black, wide discal spot, in rubbed specimens represented by two black dots in 

 a pale ticld, in the uniformly pale ash color of the fore wings, and the four distinct, deeply and 

 numerously scalloped lines. 



^OO- — "About 0.8 mm. in diameter, hemispherical, shining; under high power, irregularly 

 hexagonally sculptured, the sculptures consisting of raised lines. Color of dried SDecimen a dull 

 l)ink." (Riley MS.) 



