1894.1 
401 
[Dvar. 
elevated. Head bilobed, whitish, mottled with brown dots, especially 
over the vertex, white around the mouth; ocelli black; width 0.9 mm. 
Anal plate rather small, triangular. Body smooth except for the small 
pale setae (Fig. 3), varied with white and brown, sordid whitish on the 
sides of joints 2-3; subventrally and dorsally on joint 12 brown; a narrow 
ATlt. 
\ 
/ 
Fig. 3. Tubercles of Thyatira scripta, third stage. 
straight dorsal and lateral line with pale lateral marks indicating oblique 
lines. Thoracic feet transparent, abdominal ones pale. 
Fourth stage. — Head bilobed, rounded, whitish dotted with brown but 
leaving a streak of gi'ound color over each lobe, expanding above clypeus ; 
width 1.5 mm. Joint 3 folded to suggest horns, joint 12 a little enlarged 
dorsally, but all quite smooth ; setae fine and pale. Body marked with 
velvety brown and whitish, the latter in oblique lateral streaks on joints 5-11 
and on the subventral fold on joints 5-13, especially on joint 12. A square 
dorsal area on joints 3-4, light brown ; end of joint 13 whitish. A pale 
shade defines a narrow black dorsal line. Markings all confused, pulveru- 
lent. The velvety brown is most distinct in a patch on joints 4, 5, and 12 
dorsally. At the end of this stage the larva spins together some leaves, 
forming a house in which it molts. 
Fifth stage. — Lives in a house of leaves spun together. Head roundedly 
bilobed, pale brownish, thickly dotted with red-brown, the dots segregating 
into patches and streaks ; ocelli black ; a few short hairs ; width 2.5 mm. 
Body shaped as before; finely mottled with velvety brown reticulations 
around dots of yellow and pale brown, predominating laterally so as to form 
a pale shade which extends on the thorax to the subdorsal prominence on 
joint 3 and forms a pale, quadrate patch on joints 3-4. Oblique, pale, 
ill-defined lines on joints 5-12. A narrow black dorsal line. On joint 5, 
tubercle 3 is black and surrounded by a distinct white patch. Thoracic feet 
colorless, abdominal ones vinous. Marks more uniform brown, less con- 
trasted than in the previous stage. 
Sixth stage. — Essentially as before (see Dr. Thaxter's description of this 
stage in Papilio, v. 3, p. 10). 
Food plants. — Birch {Betula papyrifera, B. lento.) and raspberry (Eiibus 
odoratus). 
PROCEEDINGS U. S. N. JI. VOL. XXVI. 26 JAN. 1895. 
