110 



MliMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



ventral greenish yoUow line. Tlionicic lej^s lilacl<. yri'eiii.sli ;it the base: abdominal le;L;s black on 

 tlio outside, but gTceuish yellow at base within and on tlie planta-. The body is dusted (luite 

 densely with long and abundant iiale whitish gray hairs, those of the thoracic and eighth and 

 ninth abdominal segments much longer than tlie others; the short dorsal liairs on the second and 

 third thoracic and fourth to eighth abdominal segments forndng tufts meeting over tlie middle 

 of the back, while tlie lateral hair.s are grouped in tiitts which are directed downward. 



Pupa. — The following description is that of the pupa of the Olympia, Wash., larva, 2 : 

 Head a little less jfrominent than in pupa of I>. aiujunii, not distinctly notched, and the ridges 

 much Ies.s distinct. Body elongated, not very plami), suddenly i)oiiited at the end. and bearing 

 a large, broad cremaster ending in ibur spines, the two inner ones the longer, and with a small 

 lateral spine at base. Surface of the body and alxlomen coarsely punctured. Length, 20 mm. 



Dataua augusii Grote ami Kobiusoii. 



(n. II, lig. 1, J; fig. 2, 9.) 

 Daiaiiu aiiijnsii (iroto and Kob., Proc. Ent. Soc. Phil., vi, p. it, 1X66, ])!. L', tig. 1. 

 Grote, New C'lieck List N. Amer. Sloths, j). 18. 1882. 

 .Smith, List Lep. ISor. Amer., ji. 30, 1891. 

 Kiiby, S.VD. Cat. Lcp. Het. lir. Mus., i, p. 613, 1892. 



Xcuiu. anil Dyar, Traus. Amer. Ent. Sue, xxi, p. 197, ISill; .louiii. X. V. Ent., Soc ii, p. 116/ 

 Sept., 1894. 



Larva. 

 (PI. X, lig. 2.) 

 Grote (ind Robinson, Proc. Ent. Soc. Phil., vi, p. 10, 1866. (Last larval stage.) * 



HedlenmiilUr, Can. Ent., xx, p. Vi'i. IHXS. (Last larval st.age.) 



,\[otli. — Ivxterior margin of fore wings exi'avated between the veins in both sexes. General 

 color above and below smoky brown (mars brown, Ridgway's Nomenclature of Colors, PI. Ill, fig. 

 13), but paler, shading into burnt umber (Uidg., 111,8) along costal edge of fore wings. The dark 



(juadrate patch which covers the head and the anterior part of 

 the thorax is burnt umber, shading darker posteriorly. Fore 

 wings .sjiarsely irrorate, with brown-black scales, crossed by 

 Ave transverse lines which, with the apical streak, di.scal dots, 

 and fringe, are coucolorous. The lines have the same arrange- 

 ment as in all the specaes of the genus and are not quite con- 

 stant in their course. The Urst one crosses the wing at the 

 basal third and is greatly arcuate; second at about the middle, 

 passing outside of the rounded ob.scure inner di.scal dot and 

 either inside or through the outer elongate, sublinear discal 

 dot situated on discal cross vein; third line intermediate 

 between second and tifth; fourth contiguous to fifth, which is at the outer lliird of wing; the 

 fourth line is narrower than the other, and often obscure. All these lines, except lirst and fifth, 

 are obscure on the costal edge. Ai)ical stiealc short from just 

 below apex or outer margin, and runs inward and downward, 

 ending at about vein 4. Anterior to the streak, and between 

 the median vein and costa, the wing is of a brighter tint, con- 

 structing the costal shade seen in all the species. Hind wings 

 and abdomen evenly coucolorous, mars brown, the abdomen 

 darker at tip. lielow uniformly i>aler than hind wings above; 

 the body parts a shade darker. Primaries shading darker 

 toward the apices; the fringe brown black, as above. 

 Expanse of wings, i6-53 nun. 



Tliis species is marked exactly like2>. ministra and D. califor- 

 nic((, but differs in the dark smoky-brown color throughout. From 

 D. integerrima, with which it is often confounded, it differs in the scalloped outer margin of the fore 

 wings, the dark hind wings, nearly coucolorous with the primaries, and in the comparative scarcity 

 of irroration on the primaries and the absence of pale shades bordering the transverse lines 

 (Dyar). 



Fia. 56. — Pupa of Datana angush 

 ilorsal view. 



Fio. 57. — Pupa of Dataita anrfxaii. Knd 

 of lioih-. 



