MEMOIliS OF THE NATIONAL ACADEMY UF SCIENCES. 143 



Expanse of wings, S , 40-45 mm.; 9 , 40 mm.; length of body, S , 17 mm.; 9 , 21 mm. 



¥aduta behrcnsii 11. Edwards (types examined, 2 3,1 9), from Sislciyou County and Kntte 

 County, Cal. It does not seem to differ from ¥. gibbosa. The 9 lias a i)aler body and wings; the 

 fore wings are more pointed, and, as in ;i number of Pacitic Coast moths, it is on tlie wdiole larger 

 than the Eastern form of </ibbosa. 



On examining my type of JV^. <l<>nhli(l<iiii in the collection of the Aniericiin Entomological 

 Society I lind that it is not even a variety of (jlbbnua. It only differs in having the underside of 

 the palpi and of the fore legs dusky, characters which are not of varietal imi)ortance. 



The three examph'S labeled X. doublcdayi in the United States jSTational Museum are without 

 discal dots, there being only a dusky shade in their place. A single 9 from Washington, D. C, 

 has only one discal dot, and there is another 9 without any. One 9 in the same collection fnmi the 

 St. Cruz ^louuiains, California, is as large as any specimen I have seen, and with two discal dots 

 larger than in any of the other fourteen specimens examined; it is less deep ocherous than usual. 



The eggs were received from ]\Ir. 11. Meeske, and hatched .June 12. Tliey were laid on the 

 oak, and the larvte were raised on the leaves of that tree. Compaie also the descriptidn (if the 

 five stages by Miss Soule in Psyche, Yol. VI, p. 197. 



I];/;/. — Described by Miss Soule (Psyche, vi, 197) as hemispherical and opaque j-ellow, with a 

 white bloom all over them. I still need specimens for examination under high jxiwers of the 

 microscoi)e. (See Appendix A for a fuller description of the egg.) 



Larva, Stage I. — -Length, 2.5 mm. The head is large, full, and rounded, pale green, witli a 

 yellowish tinge like the body, only clearer, more amberlike; it is wider than the l)ody, which is 

 pale yellowish green. The body is smooth, without distinct piliferous tubercles, though there are 

 scattered long, tine glandular hairs, which are ocherous brown in color, arising from microscopic 

 tubercles. These hairs under a .i inch objective at first appear to be simple tapering hairs, but 

 after close observation are seen to be clear and slightly Hattened and bitid at the tip. The body 

 tapers regularly from the prothoracic segment to the end. 



Stage II (end of stage ?). — Length, 12 mm., June 2(1. The head is rounded, smooth, as wide as 

 the body where it is thickest; j'ellowish green. Tlie body is cylindrical, tapering decidedly 

 toward the end; the segments are distinctly wrinkled above. Tlie body is pale green, with two 

 broad diffuse yellowish longitudinal bands, one on each side from the protlnn-acic segment to the 

 end of the body. The hairs are minute, and, with the tubercles they arise from, not easily seen. 



Stage III. — Length, 13 mm., June 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 differs from that of the 

 previous stage in being whitish glaucous green, since the bodj^ is covered with a soft whitish 

 exudation or bloom, so as to obscure the lateral fixint yellow stripe. 



Stage IV. — Length, IS mm., June 29. The head is very large, wider than the body, and 

 pea-green in color, while the body is more whitish, covered with a white bloom. The lateral pale, 

 straw-yellow line is not very distinct. There is a faint, very narrow, vascular median dorsal line 

 over the dorsal vessel. The skin is wrinkled above, and flecked above and on the sides with white. 

 The suranal ])Iate is well rounded and edged with straw-yellow. The prothoracic segment is much 

 wider than those behind, and the body tapers rajtidly toward the end. The sjiirades are ringed 

 with light sienna-brown, rendering them rather conspicuous. The thoracic and abdominal legs are 

 pale green. 



Stage Y and Jast. — P>ody green, large; head very large, full, ronnded, high toward the vertex, 

 as wide as the body, deei» pea-green; the labrnm whitish green; mandibles bright yellow, tipped 

 with black, making them very consiiicuous. Body glaucous pea-green, thick, full, soft, tapering 

 toward the end, and the surface with minute, raised, flattened, more or less confluent granu- 

 lations. A lateral yellow line formed of yellow, raised, flattened areas. Spiracles deep red. 

 Sui)raanal plate conical, flattened, apex much rounded, the edge colored bright yellow. Thoracic 

 and abdominal feet pale iiea-green; all concolorous. Tjength, 33 mm. ; thickness, G mm. 



CONGENITAL LARVAL CIIARACTKES. 



Tiie freshly hatched larva is in shape like the adult, only the head is larger in proportion, and 

 the body is provided with bulbous glandular hairs. Tiiere are no lines nor white dots. 



