120 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



perspicun. Secoiiilaries as in J), perspicua, but tiuged with biowu along outer inargru or ou the 

 outer lialf. 



Expause ot wings, -18-50 nun. 



There are no good specific ditt'ereuces between this form and 7). persplctm. Though quite 

 dift'erent in general appearance, it is simply /). perspicua intensified. I would not suggest uniting 

 the two, however, especially as the larva of D. robuMu is unknown. (Dyar.) 



Geographical distribution. — Dallas, Tex. (Strecker Coll.); San Antonio, Tex. (Bolter); Texas 

 (French). 



Datana integerrima Grote ami Kobinsoii. 

 (PI. II, fig. 20, cj ; 21,5.) 



Datana inlerjcrritna Gi'ot-o ami Rob., Proo. Eut. .Soc.Pliil., vi, p. 12, 1806, j)l. 2. fig. 4. 

 Grote, New Clxefk List X. Amer. Moths, p. 18, 1882. 

 Smith. List hep. Bor. Amer., p. 30, 1891. 

 Kirby, .Syn. Cat. Lt-p. Het. Br. Mns., i, p. 613. 1892. 



Neum. ami Dyar. Traus. Amer. Eat. Soc., xxi, p. 199. 1894 ; .Journ. \. Y. Ent. Soc. ii, p. 116,, 

 1894. 



Larva. 

 (PI. XIII, figs. 1-6.) 



Jiiffiis in Grote aud Boh., Proc. Eut. Soc. Phil., vi, p. 13, 1866. (Full-fed larva described.) 



lieiileniiiiilltr, Can. Eut., xs, p. 134, 1888. (Stiiges IV aud V, last described, i 



Ihjiir, Psyche, p. 421, Dec., 1890. (Last stage described.) 



Packard, .louru. X. York Ent. Soc., i, p. .59, .lune, l-i93. (Last stage described.) 



Moth, — Fore wings entire, as in D. contractu; body colored in the same manner except that 

 the abdomen is le.ss yellowish. Fore wings cream-buff (R., V, 11), so heavily irroratcd with mars 

 brown (I*., Ill, ].■>) as to appear of the latter color; costal shade brighter, tawny, but not as dark 

 as the thoracic patch. Lines distinct, coucolorous with the fringe and irroration; the irrorations 

 are absent for a short space bordering the lines, causing them to ai)pear bordered distinctly by 

 paler shades. These shades border all the lines ou the outside except the first, which is bordered 

 on the inner side only, but rather faintly. Discal (b>ts obscure, blackish. Hind wings and 

 underside as in J), contracta, but i^aler, lacking the yellowish tint of that species. 



Expanse of wings, 4;j-.j0 aim. 



Allied to I>. contracta, but the ground color is less yellowish, the irrorations more numerous, 

 and all the markings are coucolorous with the fringe. (Dyar.) 



Hf/g. — "Deposited on undersideof leaf of walnut in a closely i)laced mass of .'>()(> and upward. 

 Rather small, elongate, hemispherical, approaching cylindrical; apex somewhat flattened, color 

 dull white. Surface somewhat roughened, l)ut without regular markings. Diameter, ((." nun.'' 

 (Riley MS. notes.) 



Larva. — The following notes are written out from an examination of greatly enlarged drawings, 

 made by ^Ir. Bridghain at Providence. The figure of tlie fourth stage agrees with ^Ir. Lcuten- 

 miillcr's description of the fourth stage of Datana iiitetjcrrima. The food plant is the walnut. As 

 is well known, these larva; feed in large conspicuous clusters, being social through larval life. 



First star/e. — Lengtli, when Lit hours old, 5 mm., July,l!4. In this larva the head is very large, 

 entirely lilack 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 ditl'use spiracular yellowish 

 line. There is a distinct small, t)lack prothoracic shield, transversely oblong, from which arise 

 about twenty black hairs, slightly cla\ate, two or three of them as long as the segment is thick. 

 A distinct black suranal plate is i)reseut; it is entire and rather large, though not so wide as the 

 tenth abdominal segment. The; ])iliferous warts are minute, and the dorsal and lateral glandular 

 hairs arising from them are more or less club-shaped, sojne of them markedly so, and not quite so 

 long as the body is thick. The thoracic legs are black ; the middle abdominal legs are coucolorous 

 with the body; the plantar dusky; the anal Ic^gs are about half as thick as the others and black 

 at the end. 



In another specimen of this stage, of the same length, which is just about exuviating (July 

 2;3), the body being very long aud the head small in proportion to the body, the suranal plate is. 



