— 62 — 



Datana ministra ])nny. 



It occurred at Providence, R. I., on the birch, Sept. 10-12. 

 Figured in Forest Insects, PI. IV, figs, i, 2. 



Sta^:;c next to last. — Length, 26 mm. Head black, as wide as 

 the body, ist thoracic segment black. The body is yclhm', not 

 greenish-yellow, as in the adult, and the stripes are reddish-bnmni, 

 the color of brown roofing slate. Just before molting the ist 

 thoracic segment becomes gamboge-yellow on the plate, and 

 straw-yellow around the edges. A broad dorsal reddish brown 

 line fully twice as wide as the others. There are four lateral 

 stripes all of the same width, the yellow spaces between them only 

 a little more than one-half as wide as the brown bands; the 3d 

 brown band includes the black spiracles. Thoracic feet black; 

 suranal plate and anal legs black; middle abdominal legs dark, 

 four of tlie legs pale livid reddish; plantje pale. The hairs are 

 minute, short, iiot apparent without a lens. 



The head and thoracic segments often held bent over back- 

 wards, so that the thoracic feet stick up, while the tail is so bent up 

 as to nearly meet the head. 



Last stage. — Length, 30 mm. Head black. Body with white, 

 eonspicuotis liairs, many of them one-third longer than the body is 

 thick. The body is now distinctly greenis/i-yelloiu, and the pro- 

 thoracic plate gamboge-yellow. The stripes are black, not reddish 

 dark brown, as before. The 3d or spiracular band is a little wider 

 than before, and continued on to the prothoracic segment, under 

 the gamboge-yellow ])late. Base of the legs and space around 

 and between them honey-yellow, not dull reddish-yellow, as in the 

 ])revious stage. Middle abdominal legs reddish-yellow, with a 

 large black chitinous plate above the planta. 



Datana angusii G. d> R. 



The specimens here described were received under the above 

 name from Mr. James Angus, Sept. 4. I failed to note their 

 length, but they were nearly if not ciuite full-grown. 



Head black, including the mouth parts. The prothoracic 

 shield is distinct, transversely oblong, black. Body black, with 

 four narrow pale whitish-yellow stripes on each side. The two 

 dorsal stripes are wide apart, leaving a broad dorsal median black 

 stripe; the space between the ist and 2d line is a little wider than 

 between the 2d and 3d; the 4th line is slightly wider than the 

 others, scalloped, and interrupted by the sutures between the 

 segments. Beneath the lateral ridge along the base of the legs is 



