MEMOIES OF TUE NATIONAL ACADEMY OF SCIENCES. 
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divided into two oval lanceolate black plates, tbe small ends pointing toward the bead. Otherwise 
tbe body is marked as in tbe above-described specimen, except that there are black spots at tbe 
base of tbe middle abdominal legs, Tbe hairs are not represented as so clavate as in tbe other 
specimen. It is possible that the latter is in tbe second stage, but if so, tbe suranal plate would 
not probably bo so large and entire. 
Third stage. — Length, 7 mm. (probably not of tbe normal length, owing to confinement), July 
30. About ready to molt, as tbe protboracic segment is somewhat swollen. The black protboracic 
plate still persists, and tbe hairs arising from it are about twice as long as those elsewhere, but 
tbe black suranal plate has disaiipeared; tbe anal legs are still slight, and tbe body beyond tbe 
sixth abdominal segment is upraised. The reddish color has deepened, and tbe yellowish lines 
ai'e more distinct, while tbe spiracular line, inclosing tbe distinct black spiracles, is xuilo lilac; the 
middle abdominal legs do not appear to be spotted. 
Fourth stage. — Length, 10 mm., August 13 (evidently underfed and unnaturally small). The 
bead is large, as wide as tbe body in front; tbe cervical shield still ])ersists, as do tbe clavate 
hairs. Tbe color has now changed to a dark reddish brown, above and beneath, with longitudinal 
gray stripes seen from above and four seen sideways; tbe additional stripe is tbe iufraspiracular 
one, while the spiracular one has moved up, tbe spiracles being situated between them. 
Tbe following is a description of another larva of this stage received from Mr. Angus,. 
August 23 : 
Length, 15 mm. Ilead shining black, us wide as tbe body. 
Tbe body of the usual cylindrical shape, rather slender, dark pitchy reddish brown all over,. 
Protboracic shield transversely oblong, not so square at tbe corners as in I), perspicua. There are- 
four dull whitish rather obscure lines on each side, which are of nearly the same width and of 
exactly the same color; they are somewhat irregular on the edges, being somewhat broken and 
of the same distance ai)art. The lowest or iufraspiracular line is a little wider and more distinct 
than the others, and extends along the lateral ridge. The body beneath is of the same color as 
above. The suranal plate is black, rounded; the anal legs are black at the tips. The middle 
abdominal legs are stained black above the plantm, and the tlioracic legs are black. The hairs- 
are long and white; those on first thoracic segment, and eighth and ninth abdominal, longer than 
those elsewhere; those on the protboracic segment stand up and curl over the head, and two or 
three of them are as long as the three thoracic segments put together. The spiracles are black. 
Fifth stage . — Length, 28 mm., August 29. Very different from the fourth stage, the color 
being still darker, while only two grayish lines are seen from above, and two lines when the larva 
is seen from the side. The two dorsal and the supraspiracular lines have disappeared. The body 
is now clothed with numerous soft fine gray hairs, many of which are nearly as long as the body.. 
The anal legs are still smaller than in the preceding stage. 
Recapitulation. — 1. In this species the larvie of the first four stages apparently have clavate^ 
glandular hairs, an unusually late persistence. 
2. The body is reddish in the three first stages, but becomes dark in the fourth, while in J).. 
viinistra the body is reddish in the fourth, being less precocious than in this species. 
3. Tlie loss of two of the longitudinal stripes in stage Y is noteworthy, and the habits of the- 
larva sliould be noted by the future observer to learn the probable cause of such a change; also why 
in 7>. minlstra, and perhaps in other species, there is such a decided change in the general color 
and stri])es in the last as conix^ared with the penultimate stage. 
4. The black suranal plate seems in Stage I to be entire, and to divide in two at the end of the- 
stage, not being present in the third stage. It is to be hoped that those who may hereafter rear 
the si>ecies of Dafana will preserve specimens of the earlier stages in alcohol for future study. 
Eggs, August: larvm, August and Se]>tember; adults, May and August; localities,. 
Kansas, ^Missouri, Indiana, New Ahn-k, Maine, and District of Columbia; food idants, walnut, 
hickory, larkspur, thorn. (Eiley IMS. notes.) 
Food plants , — The larvio prefer black walnut, but feed on hickory, butternut, etc. (Angus);, 
walnut (Pilate); “Live together in large companies on walnut {Juglans)^ hickory (Cargo), beech,. 
(Fagus)^ and also on oak (Quercus), but very rarely” (Beutenmiiller) ; willow, honey locust, thorn,, 
and apple (Riley). In Kansas, Juglans nigra (Popenoe). 
