MEilOIES OF THE :N'AT10yAL ACADEMY OF SCIEXCKS. 143 



Expanse of wings, 3 , 40— t.") luii!. : 9 , 4G mm. ; lengtli of body, S , 17 mm. : 9 , 21 mm. 



Xadftta behnnsii 11. Edwards (types examined. 2 (?,12),from Siskiyou County and Butte 

 County, Cal. It does not seem to difier from X yihhom. The 9 Las a paler body and wings; the 

 fore wings are more pointed, and, as in a number of Pacific Coast moths, it is on the whole larger 

 than the Eastern form of (jibhom. 



On examining my type of X. doubkflayi in the collection of the American Entomological 

 Society I find that it is not even a variety of (jibbosn. It only ditt'ers in having the underside of 

 the i)alpi and of the fore legs dusky, characters -which are not of varietal importance. 



The three examples labeled X. doiibledayi in the United States Xational 3Iuseum are without 

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

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

 St. Cruz Mountains, California, is as large as any specimen I have seen, and with two diseal dots 

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



The eggs were received from Mr. H. Meeske, and hatched June 12. They were laid on the 

 oak, and the larvte were raised on the leaves of that tree. Compare also the description of the 

 five stages by Miss Sonle in Psyche, Vol. VI, p. 197. 



£,),/, — Described by Miss Sonle (Psyche, vi. 197) as hemispherical and opaque yellow, with a 

 white bloom all over them. 1 still need specimens for examination under high powers of the 

 microscope. (Sec Aiipendix A for a fuller description of the egg.) 



Larra. Stage I. — Length, 2..j 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 body, which is 

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

 scattered long, fine 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 flattened and bifid at the tip. The body 

 talkers regularly from the piothoracic segment to the end. 



Stage II (end of stage ?). — Lengtli. 12 mm., June 20. The head is rounded, smooth, as wide as 

 the body where it is thickest; yellowish green. The body is cylindrical, tapering decidedly 

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

 broad ditfuse yellowish longitudinal bands, one on each side froiu the protlioracic segment to the 

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



Stnye 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 iu being whitish glaucous green, since the body is covered with a soft wliitish 

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



Stage IV. — Length. 18 mm., June 29. The head is very large, wider than the body, and 

 pea-green in color, wliile 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 ]ilate is well rounded and edged with straw-yellow. The prothoracic segment is much 

 wider than those behind, and the body tapers rapidly toward the end. The s]>iracles are ringeil 

 with light sienna brown, rendering them rather conspicuou.s. The thoracic and abdominal legs are 

 pale green. 



Stage V and last. — Body green, large: head very large, full, rounded, high toward the vertex, 

 as wide as the body, deep pea-green: the labrum whitish green; mandibles bright yellow, tipped 

 with black, making them very conspicuous. 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. 

 Supraanal plate conical, flattened, apex much rounded, the edge colored bright yellow. Thoracic 

 and abdominal feet pale pea-green ; all coucolorous. Length, 33 mm.; thickness, 6 mm. 



COXCJEXITAL LAKVAL CHARACTERS. 



The 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. There are no lines nor white dots. 



