— 68 — 



fine bristles. It has a blackish shade extending up from a point 

 above the last spiracle to the apex, which is dark. The body is 

 chocolate colored ; the heail redder, finely mottled with paler 

 retldish. The suranal plate is well rounded behind, the surface 

 roughened, with no piliferous warts, and this and the anal legs 

 are mtjre retldish than the body, being of a reddish pink hue. 

 The spiracles are much larger than in stage III, and are blackish, 

 surrounded by a broad, ])ale, flesh-colored ring. The middle 

 abdominal legs have a shining chitinous black patch above the 

 planta, there being no such patch on the anal legs. The thoracic 

 legs are dark, pitchy amber. 



For the last stage see my description in Proc. Boston Soc. 

 Nat. Hist., Vol. .xxiv, p. 52,^. 



Recapitulation: — i. The median dorsal tubercle or incipient 

 '* horn " on the 8th abdominal segment is in stage 1 plainly seen 

 to be double, the result of the coalescence and specialization of 

 what were originally two dorsal warts. In stage II, this tubercle 

 becomes a well developed, high, conical, fleshy horn. 



2. The prothoracic plate of stage I disappears in stage II. 



3. Appearance in stage II of the dark reddish brown spots 

 and band on the sides of the body. 



4. Appearance in stage III of traces of a whitish subdorsal 

 line, while the lateral yellow line is well marked. 



CEdemasia concinna Abbot and Smith. 



The later stages of this caterpillar, beginning with the second, 

 are described by me in the i-'roceedings of the Boston Society of 

 Natural History, \'ol. xxiv, 531. I found the eggs with the larv;Tj 

 just hatching on the lea\es of the willow at Brunswick, Maine, 

 J une 24. The eggs were in this case somewhat scattered, and few in 

 number, and the larvae did not feed gregariously. The larvae con- 

 tinue to hatch till the early part of August in Maine, as Aug. 14, 

 I found the larvic in stage II, and also- fully grown on the aspen. 



Eg}:;. — Diameter about i mm. Low hemispherical, the height 

 being about half the diameter. The shell is thin, smooth, and 

 under a triplet not seen to be pitted, but under a half-inch objec- 

 tive the surface is seen to be divided into regular, moderately large 

 |K)lygonal areas, with slightly raised but distinct edges. 



Freshly hatched lar'ca. — Length, 3 mm. Head large, globular. 

 smooth and unarmed, a thirtl wider than the body, deep dark, 

 honey-yellow. The body is greenish-yellow above, cherry-reddish 

 on the sides ; the prothoracic dorsal tubercles are larger and 



