me:moies of the national academy of sciences. 
143 
Exjiaiise of wings, $ , 40-45 miii. 
9 , 4G mm. 
leugtli of body, S , 17 mm. 
9 , 21 mm. 
Xadata hehrensii II. Edwards (tyi)es examined, 2 5,19), from Siskiyou County and Butte 
County, Cal. It does not seem to diil'er from A. gibhosa. The 9 has a ]»aler body and Aviiigs; the 
fore wings are more pointed, and, as in a number of Pacific Coast moths, it is on tlie whole larger 
than the Eastern form of gihbom. 
On examining my ty]>o of A. doublcflayi in the collection of the American Entomological 
Society 1 find that it is not even a- variety' of gibbosti. It only differs in having the underside of 
the pali)i and of the fore legs dusky, characters which are not of varietal importance. 
TIte three examples labeled A. (loublcdayi in the Fnited States National Museum are without 
discal dots, there being only a dusky shade in their place, A single 9 from Washington, D. C., 
has only one disctil dot, and there is another 9 Avithout any. One 9 in the same collection from the 
St. Cruz ^lountains, California, is as large as any specimen I have seen, and Avith two discal dots 
larger than in any of the other fourteen specimens examined; it is less deep ocherous than usual. 
The eggs Avere received from 5Ir. II. Meeske, and hatched June 12. They were laid on the 
oak, and the larvm were raised on the leaA'es of that tree. Compare also the description of the 
five stages by Miss Soule in Psyche, Tol. YI, p. 107. 
— Described by ]\Iiss Soule (Psyche, A'i, 197) as hemispherical and opaque yelloAv, Avith a 
white bloom all over the*n. I still iieetl specimens foi* examination under high jxiAvers of the 
microscoi)e. (See Appendix A for a fuller descrii)tiou of the egg.) 
Larva^ Stage J. — Length, 2.5 inm. The heacl is large, full, and rounded, pale green, Avith a 
yelloAvish tinge like the body, only (dearer, more ainber-likc^', it is Avider than the body, Avhicdi is 
l)ale yellowish green. The body is smooth, Avithont distinct piliferous tubercles, tliough there are 
scattered long, fine glandular hairs, which are ocherous broAvn in color, arisiiig from micros(fopic 
tubercles. These hairs under a i-inch obJectiA'C at lirst appear to he simple tapering hairs, but 
after close observation are seen to be clear and slightly llattened and bilid at the tip. The body 
tapers regularly from the piothoraeic segment to the end. 
Stage II (end of stage?). — Length, 12 inm., June 20. The head is rounded, smooth, asAvideas- 
the body where it is thickest; yellowish green. The body is cylindrical, tapering decidedly 
toward the end; the segments are distinctly Avrinkled above. The body is pale green, with two 
broad diffuse yelloAvish longitudinal bands, one on each side from the prothoracic segment to the 
end of the body. The hairs are minute, and, Avith the tubercles they arise from, not easily seen. 
Stage III. — Length, 13 mm., Juno 23. Of the same shape as before. The head is still much 
wider than the body; it is a little deeper green, but the color of the body ditfers from that of the 
previous stage in being whitish glaucous green, since the body is covered Avith a soft whitish 
exudation or bloom, so as to obscure the lateral faint yellow stripe. 
Stage IV. — Length, IS min., June 29. The head is very large, Avider than the body, and 
pea-green in <5oIor, while the body is more Avhitish, covered with a white bloom. The lateral pale, 
straw-yellow line is not A'ery distinct. There is a> faint, A'ery narrow, vascular median dorsal line 
over the dorsal A'essel. The skin is Avrinkled above, and decked above and on the sides with Avhite. 
The suranal idnte is Avell rounded and edged with straw-yellow. The jirothoracic segment is much 
Avider than those behind, and the body tapers rapidly toward the end. The spiracles are ringed 
Avith light sienna-brown, rendering them rather conspicuous. The thoracic and abdominal legs are 
l)ale green. 
Stage V and last. — Body green, large; head very large, full, rounded, liigh toward the A*ertex, 
as Avide as the body, deep pea-green; the labrnm whitish green; mandibles bright yellow, tipjied 
with black, making them very conspicuous. Body glaucous pea-greeu, thick, full, soft, tapering 
toward the end, and the surfa(*e with minute, raised, tiatteued, more or less contlueiit granu- 
lations. A lateral yellow line formed of yellow, raised, flattened areas. Spiracles deep red. 
Smiraanal plate conical, flattened, apex much roiuided, the edge colored bright yelloAV. Thoracic 
and abdominal feet x)ale pea-greeu ; all coucolorous, Ijcngth, 33 min.; thickness, 0 min. 
CONGENITAL LAUVAL CIIAKACTERS. 
The freshly hatched larva is in shajie like the adult, only the head is larger in proportion, aiul 
the body is provided with bulbous glandular hairs. There are no lines nor AA’hite dots. 
