INSECTS INJURING OAK-LEAVES. 151 



on the ontside; anal inferior and of little use to the worm, small, thin, and shiny 

 black. 



When young the larvae 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 (Riley's unpublished notes.) 



Moth. — 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, fainter 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 covtracta 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 Z>. 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 

 reddish-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. 



