120 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



perspicua. Secondaries us in D. i^o'spiom, but tiuged with Lruwii along' outer uiarg'n or on the 

 outer half. 



Expanse of wings, 48-50 mm. 



There arc no good specific differences between this form and J>. jyrrspicuu. Though quite 

 different in general appearance, it is simply J>. perspicua intensitied. I would not suggest uniting 

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



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

 (French). 



Datana integerrima Grote and Robiiisou. 

 (PI. II, fig. 20,J;L'1,9.) 



Ihttana inlcijerrima Grote and Rob., Proc. Ent. Soc.Phil., vi, p. 12, 18(i6. pi. 2. fig. 4. 

 Grote, New Check List X. Anier. Moths, p. 18, 1882. 

 Smith, Li,st Lep. Bor. Anier., p. 30, 1891. 

 Kirby, Syn. Cat. Lep. Het. Br. Mus., i, p. 613, 1892. 



Neum. and Dyar, Trans. Amer. Ent. Soc., sxi, p. 199, 1894; Jouru. N. Y. Ent. Soc., ii, p. 116, 

 1894. 



Larva. 

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



Angus ill Grote and Roh., Proc. Eut. Soc. Phil., vi, p. 13, 1866. {FuU-lVd larva described.) 



Beiilenmiilltr, Can. Ent., xx, p. 134, 1888. (Stages IV and V. last descril)eil.) 



Dyar, P.syche, p. 421, Dec., 1890. (L.ast stage described.) 



Packard, Journ. X. York Ent. Soc., i. p. 59, June, 1-^93. (Last stage described.) 



Moth. — Fore wings entire, as in I>. contracta ; 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 (I!., Ill, 1.'5) as to appear of the latter 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 for a 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 

 on the inner side only, but rather faintly. Discal dots obscure, blackish. Hind wings and 

 underside as in D. contractu, but paler, lacking the yellowish tint of that species. 



Expanse of wings, iS-uO mm. 



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

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



I];i<j. — "Deposited on underside of leaf of walnut in a closely placed mass of .JOd and upward. 

 Eather small, elongate, hemisplierical, approaching cylindrical; apex somewhat tlattened, color 

 dull white. Surface somewhat roughened, l)ut without regular marking.s. Diameter, 0.7 mm."' 

 (Riley MS, notes.) 



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

 made by Mr. Bridghain at Providence. The figure of the fourth stage agrees with Mr. Beuteu- 

 miiller's description of the fourth stage of Datana integerrima. 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, when -i hours old, ■") mm., July.l-'-l. 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 sj)iracular 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 suranal plate is present; 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 dub-.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 plantiie dusky; the anal legs 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 and the head small in jiroportiou to the body, the suranal plate is 



