112 
MExAIOIRS OF THE ISTATIOi^AL ACADEMY OF SOIEXGES. 
Datana drexelii Edwards. 
(PI. 11, fig. 5,^ ; fig. 6, 90 
Datana drexelii H. Edw., Papilio, iv’, p. 25, Feb., 1884. 
Smith, List Lep. Bor. Amer., p. 30, 1892. 
Kirby, Syu. Cat. Lep. Het., i, p. 013, 1892. 
Neum. ami Dyar, Trans. Amer. Eut. Soc., xxi, p. 198, 1894; Journ. N. Y. Eut. Soc., ii, p. 116, 
Sept., 1894. 
Larva. 
(Plate XI, figs. 2, 26, 2c, 3.) 
Edwarde^ Pax)ilio, iv, p.25, 1884. 
Eeutenmiiller, Can. Ent., xx, 57, 1886. 
Dyar, Psyche, v, p. 418, 1890. 
Moth , — Exterior margin of the primaries less distinctly scalloped in the $ than in the $ , but 
fore wings distinctly so in both, with the markings as in J), ministra, but larger, and the costal 
shade is bright, distinct, contrasting. Its tint is ochraceous (liidg., V, 7). Thoracic patch 
tawny ochraceous (li , V, 4) in front, shading darker, as in B. ininistra, Discal dot large and 
distinct, darker than the line (^‘Fronts brown,” It., HI, 11), the inner round, outer elliptical. 
Hind wings darker than is usual in ministrcij shaded, somewhat powdered with russet (E,, III, 10), 
a faint paler extramesial band sometimes perceptible. Underside essentially like I>. mhiistro. 
Occasionally a dark shade, concolorous Avith the lines, fills up a part or most of the space betAA’eeii 
the first and fifth line beloAA^ the costal shade. Expanse of AA'ings, 48-55 mm (Dyar). 
— Snbspherical, shell thick opake, porcelain Avhite; micropyle smaller than mB, major. 
see p. 110. 
Larva., Stage I . — “Head rounded, black, shiny; Avidth, 0.5 mm. When nearly hatched the 
larva is scarcely distinguishable from B. major. The anal feet are rather long and elevated. 
Body sordid yellow, cerAUcal shield, anal plate, and feet blackish. A number of short hairs from 
the head and from about six rows of small blackish tubercles, Avhich are larger in proportion than 
in the subsequent stages. As the stage advances the body becomes reddish, with four lateral 
stripes on each side and three ventral, about as wide as tbe intervening spaces, dull yelloAv and 
confluent i)osteriorIy, During this stage the larATc eat the parenchyma in the same manner as 
B. major. I have estimated that a single larva eats about 00 sq. mm. of Avitch-hazel leaf.” 
Stage II . — “ Head black and sliiny, with a few hairs; Avidth, 1.1 mm. Body brown, stripes dull 
yellow, narrower than the intervening spaces, extending from the cervical shield and the {interior 
edge of the prothoracic segment to the anal plate, and becoming a little confluent there. Cervical 
shield, anal plate, thoracic and anal feet, and the abdominal feet outwardlj' black. Hairs short 
and pale. During this stage the larvae eat the whole leaf.” 
Stage III. — “Head higher than wide, depressed at the sutures of the clypeus; smooth, shiny 
black; Avidth, 1.8 mm. Body broAvu, the stripes yellow, confluent iiosteriorly and along the 
anterior edges of the prothoracic segment. Otherwise as in the preA'ious stage.” 
Stage I Y . — “Head shaped as before, smooth, centrally depressed at the top of the clypeus 
and more slightly along the central suture: cljqAeiis and labrum Avrinkled; all shining black; 
Avidth, 3.2 mm. Cervical shield black or partly brown; in some examples nearly all light brown; 
anal plate, thoracic feet, and the abdominal feet outwardly' black. Body' black or partly brown, the 
anterior half of the prothoracic segment y'el low, the stripes strongly confluent on the last segment. 
The bases of the legs and corresponding spots on the legless segments, as in the mature larva, of 
a darker yellow than the lines. Each segment is shaded centrally with this yellow, but it does 
not cause the lines to appear confluent, on account of its darker shade. Hairs sordid white, besides 
other short, tine, brownish hairs seen Avith a lens.” 
Stage Head as high as wide, flattened in front, depressed at the upper part of the 
sutures of the clypeus, iiunctured. Clypeus and labrum someAvhat Avrinkled. Color shiny’^ black, 
the anteniiie and palpi white ringed, their bases greenish. Width, 5.4 mm. Body black, cerAUcal 
shield honey yelloAv; anal ])late, thoracic and anal feet, and the abdominal feet outwardly black. 
Anterior half of the prothoracic segment yellow; stripes narroAver than the spaces, citron-yellow, 
