MEMOIES OF THE KATI0:N’AL ACADE3IY OF SCIEmiES. 
105 
Pupa rather stout, head iiromiuent, notched at the eud ; the surface rugose and very coarsely 
punctured, the pits being more or less conduent, especially on the thorax. Cremaster wide at base,, 
bearing a imir of double sharp spines. 
I am at present inclined to think that this group may be the most generalized one of the 
family, owing to the smooth and hairy larvae, resembling those of the Xyctemeridie, Liparidie, etc. 
Datana "Walker. 
(PI. XXXIX, and PI. XL lig. 5. Venation.) 
Phala;na Drury, 111. Nat. Hist., ii, 1773. 
Abbot and Smith, Lci). Ins. Georgia, 1797. 
Fygwra? Harri.s, Cat. Ins. Mass., p. 73, 1835. 
Petasiaf Westwood, Drury^s III. Exot. Ent., ii. p. 27, 1837. 
Datana Walker, Cat. Lep. Het. Br. Mus., v, p. 1000, 1855. 
Eumetopona Fitch, 2d Rep. Nox. Ins. N. Y., p. 235, 1850. 
Datana Grote, New Check Li.st N. Ainer. Moths., p. 18, 1882. 
Smith, List Lei). Aiiier., p. 30, 1891. 
Kirhy, Syn. Cat. Lep. Het., i, p. 612, 1892. 
Neuni. and Dyar, Trans. Ainer. E^t. Soc., xxi, p. 197, .Tune, 1894; Jonrn. N. Y. Ent. Soc., ii, pp. 112, 
116, Sept., 1894. 
Moth . — Head not prominent, rather sunken; front vertically oblong, narrower in 9 ; the 
scales clothing it short, closely, and evenly cut. Auteuum not pectinated in $ , the joints only 
slightly produced beneath, and ciliated. Between the anteiinm at base is a minute vertical 
pointed tuft. Maxilla*, about as long as the head, sometimes separate, but usually united and 
rolled up. Palpi short aud stout, ascemliug, second and third joints bent upward even with the 
front; the scales on the second joint long, bushy, even with or passing beyond the end of the 
minute third joiut. 
Thorax rather large, pilose, convex, not tufted. Fore wings one-half as long as broad, 
triangular; costa straight, becoming curved at the apex, which is pointed and slightly falcate; 
outer edge slightly scalloped and in $ very slightly excavated just below the apex. Hind wings 
with the costal edge convex and bent down toward the apex, which is somewhat iwoduced; 
outer edge slightly bent on the second median venule. Venation: A narrow subrhomboidal 
subcostal cell, otherwise much as in Xadata, but with the costal region wider toward the apex. 
Legs with the femora and tibhe deusely hairy; the second pair of spurs on the hind tibim 
longer than the tirst; tarsi rather thick. Abdomen long, somewhat flattened in 3 , with a slight 
tuft at the eud; claspers large, long, aud well developed. 
Coloration usually very uniform, the species closely resembling each other, as do the larvse., 
but ditfering somewhat in the vena tion of the fore wings; body and wings ocherous, thorax Avith a 
darker brownish i)iitch, which is contracted and square b(‘hind; fore wings usually ocherous, 
reddish brown, with a regular curved basal whitish brown line, and three parallel more or less 
straight outer lines, with one or two disc^al dots; hind wings and body pale ocherous. 
The species are readily recognized by the simple, ciliated antenme, short palpi, and the 
peculiar mode of coloration. 
As regards the protective mimicry exhibited in these moths Avheii at rest, Grote remarks that 
Datana in repose ‘Hooks like a broken twig, the shaded thorax, with its raised tufts at the sides, 
like the top of the twig at the break.*’ (Can. Ent., xx., ii. 184, Sept., 1888.) 
Larva , — Body cylindrical, brightly banded, of uniform thickness, and with no tubercles or 
humps; usually with long, ratlier dense, jiale hairs. .Freshly hatched larva, head large; body with 
long clavate glandular hairs of unequal length; with faint siibdorsal and lateral stripes, 
Diipa . — Head prominent, pi'ojectiug well beyond -the body, and with twoiiarallel dorsal ridges;; 
the surface of the body quite rough, being corrugated and granulated. 
Geofp'aphlcal distribution , — The species are confined to the Appalachian and Austroripariau 
subprovinces, except one (or two) species oii the Pacific Coast. One species, Datana integerrima^ 
is said by .Air. Druce (Biol. Ceiitr. Amer., p. 245) to occur at Jalapa, Alexico, this being in the^ 
tropical or subtropical belt. 
