INSECTS INJURING OAK-LEAVES. 151 
on the outside; anal inferior and of little use to the worm, small, thin, and shiny 
black. 
When young the larvse are brown or tawny yellow, with white stripes and more 
hair. 
The larvae go into the ground the latter part of August, and in less than thirty 
hou.-s change to a chrysalis. 
Pupa. — Eight-tenths of an inch and upwards in length, of the same form and 
appearance as that of D. angusii, but neither so dark nor so thickly punctured, and 
the four spines at the end are smaller in proportion. (Riley's unpublished notes.) 
^foth. — Dark reddish-brown. Anterior wings entire along external margin, thickly 
and evenly covered with fine scattered irrorations, with a bright shade extending 
along costa centrally and above apical streak. Five transverse dark-brown lines. 
The first moderately arcuate, margined within by a paler shade. A central discal 
dot. The space between the first and second transverse lines darker. The second 
line covers the outer discal dot and is margined outwardly by paler scales, as are the 
third, fourth, and fifth lines. The position of all these lines is subject to variation. 
The fourth is, as usual, faiuter than the rest and very contiguous to the fifth. Pos- 
terior wings very pale, crossed by a rather broad, pale, median shade. Under sur- 
face paler than upper, deepening in color towards external margin; fringes dark. 
The scales which clothe the head and form the thoracic patch are dark tawny- 
brown, deepening in color towards the edges of the thorax. The metathoracic and 
lateral hairs are very pale. Abdomen pale, testaceous; and segment concolorous with 
the rest. Expanse, male and female, 1.80 to 2.30 inches. Length of body, 0.78 to 1.10 
inches. (Grote and Robinson.) 
209. Datana contracta Walker. 
Mr. James Angus has bred this species, which is confined to various 
species of oak, not feeding on other kinds of trees. 
Larva.— Head black, shining. Body black, with four lateral broad yellowish-white 
stripes ; a fifth is interrupted centrally by the legs, as in D. ministra, but in this latter 
species the stripes are darker and slightly narrow, while the larva is larger than 
that of D. contracta. The body is clothed with longer hair and is of a deeper black 
than in D. ministra. The dorsal swelled portion of the prothoracie ring is similarly 
colored, but less prominent and exserted than in its congener. (Angus.*) 
Moth. — Luteous tawny. Anterior wings entire, with a brighter shade extending 
along the costa centrally and above the apical streak. Profusely and distinctly 
irrorate with dark brown scales. Five transverse brown lines. The first oblique, 
very slightly arcuate, and margined inwardly with lighter scales. A central discal 
dot. The second line curved outwardly at costa, thence running inversely obliquely 
to internal margin. This line, which is margined outwardly with paler scales, joins 
the first at internal margin in a single specim en before us. A second discal spot. 
The third line slightly arcuate at costa, thence running parallel with fourth and fifth 
lines to internal margin. The third and fifth distinctly margined outwardly with 
paler scales. The fourth, which is quite contiguous to the fifth, is indistinct, and, 
in some instances, almost obsolete. Apical streak obsolete superiorly, indistinct. 
Fringes bright reddish-brown, the same with the thoracic patch. Posterior wings 
very pale, with a paler median shade. Under surface paler than upper, shading to 
reddisn-brown towards external margin on anterior wings. The scales which clothe 
* The exact references to the place of publication of descriptions (published before 
1889) of this and nearly all the other caterpillars noticed in this report may be found 
by the reader in Mr. Henry Edwards' useful Bibliographical Catalogue of the described 
Transformations of North American Lepidoptera, forming Bulletin No. 35 of the U. S. 
National Museum, Washington, 18-9. 
