120 
MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
perspicua. Secondaries as in perspicua^ but tinged with brown along outer marg’u or on tho 
outer half. 
Expanse of wings, 48-50 inm. 
Thei'C are no good specific differences between this form and D. perspicua. Though quite 
difl-erent in general appearance, it is simply 7>. perspicua intensified, I would not suggest uniting 
the two, however, esx^ecially as the larva of J). rohusta is unknown, (Dyar.) 
Geographical distrihtiiion . — Dallas, Tex. (Strecker Coll .) 5 San Antonio, Tex. (Bolter); Texas 
(French). 
Datana integerrima Grote and Robinson. 
(PI. II, ag. 20 ,,?; 21 , 5 .) 
Datana integerrima Grote and Rob., Proc. Eut. Soc.Pliil,, vi, p. 12, 1866, pi. 2, fig. 4. 
Grote, New Check List N. Amer. Cloths, p. 18, 1882. 
Smith, List Lep. Bor. Amer., p. 30, 1891. 
Kirby, Syn. Cat. Lep. Ilet. Br. Mua., i, p. 613, 1892. 
Neuui. and Dyar, Trans. Amer. Eut. Soc., xxi, p. 199, 1894; Jouru. N. Y. Ent. Soc., ii, p. 116,. 
1894. 
Larva. 
(PI. XIII, figs. 1-6.) 
Angne in Grote and Roh., Proc. Ent. Soc. Phil., vi, p. 13, 1866. (Full-fed larva described.) 
BentenmiiUtrj Can. Ent., xx, p. 134, 1888. (Stages IV and V, last described.) 
Dyar, Psycho, p. 421, Dec., 1890. (Last stage described.) 
Packard, .Toiirn. N. York Ent. Soc., i, yn 59, Juno, l'^93. (Last stage described.) 
Moth , — Fore wings entire, as in B, coniracta; body colored in the same manner except that 
the abdomen is less yellowish. Fore wings cream-buff (R., V, 11), so heavily irrorated with mars 
brown (R., Ill, 13) as to appear of the hitter color; costal shade brighter, tawny, but not as dark 
as the thoracic patch. Lines distinct, concolorous with the fringe and irroratiou; the irrorations 
are absent fora short space bordering the lines, causing them to appear bordered distinctly by 
paler shades. These shades border all the lines on the outside except the first, which is bordered 
ou the inner side only, but rather faintly. Discal dots obscure, blackish. Hiiul wings and 
underside as in B. coniracta,, but paler, lacking the j'ellowish tint of that species. 
Expanse of ivings, 45-50 mm. 
Allied to !), coniracta,, but the ground color is less yellowish, the irrorations more numerous^ 
and all the markings are concolorous with the fringe. (Dyar.) 
Egg , — “Deposited on underside of leaf of walnut in a closely placed mass of 300 and upward. 
Rather small, elongate, hemispherical, approaching cylindrical; iiy^ex somewhat flattened, color 
dull white. Surface somewhat roughened, but without regular markings. Diameter, 0.7 min.’^ 
(Riley MS. notes.) 
Larva. — The following notes are written out from an examination of greatly enlarged drawings,, 
made by Mr. Bridghaiu at Providence. The figure of the fourth stage agrees with 3Ir. Beuteu- 
niiiller’s description of the fourth stage of Batana intega'rima. The food plant is the walnut. As 
is well known, these larvie feed in large conspicuous clusters, being social through larval life. 
First stage . — Length, wheu 24 hours old, 5 mm., July 24. In this larva the head is very large, 
entirely black and hairy, being nearly twice as wide as the end of the body. The body is brick red,, 
with a faint subdorsal and lateral yellowish stripe along the body, and a diffuse spiracular yellowish 
line. There is a distinct small, black prothoracic shield, transversely oblong, from which arise 
about twenty black hairs, slightly clavate, two or three of them as long as the segment is thick. 
A distinct black suraual i>late is i)resent; it is entire and rather large, though not so wide as the 
tenth abdominal segment. The piliferous warts are minute, and the dorsal and lateral glandular 
hairs arising from them are more or less club-shaped, some of them markedly so, and not quite so 
long as the body is thick. The thoracic legs are black; the middle abdominal legs are concolorous 
with the body; the idautie dusky; the anal legs are about half as thick as the others and black 
at the end. 
In another s^pecimen of this stage, of the same length, which is just about exuviating (July 
23), the body being very long and the head small in proportion to the body, the suranal plate is 
