98 MEMOIRS OF THE ZSTATIOXAL ACADEMY OF SCIENCES. 



it as the type of a new genus, allied to, but distinct from, Glupliisia, owiiii;- to the notable differ- 

 ences in tlie venation, as well as the presence of a dorsal tuft and other cliaracters given below. 

 After sending my description for publication Mr. Dyar wrote me that he had seen the specimen 

 with my name on it in Mrs. Slosson's collection and that it seemed to him to be a dark 9 of 

 GUiphma nriniacula Hudson, adding that ,Mr. Neumogen's ^'Melia danhyi"' is referable to the same 

 genus, but his name "Melia" is preoccui)icd. Since then I have reexamined Edwards's type of 

 G. scvera, and have received from Mr. Dyar a specimen of G. lintncri. Mr. Dyar also wrote me as 

 his oiiinion that the species of Ceruridia or Melia (Eumelia) are not generically different from 

 GIiii)hisia, as he has collected G. severa in the Yosemite Valley, Cal. 



As the result of my studies, especially of the venation, I am 'inclined to divide the genus 

 Gluphisia into two sections and to believe that in the forms mentioned below we have a number 

 of climatic or temperature varieties of a species allied to G. lintneri (originally referred to 

 Dasycliira by Grote). and which is common to both the xVtlantic and Pacilic coasts. 



Of all these forms the variety xlossoniw is the most remarkable, from its very dark markings, 

 aiul deserves to receive a distinct name. That these forms may be the result of climatic causes, 

 acting on the insect in its i)upal state, seems pretty well established fri)m the remarkable results 

 obtained not only by Weismann and W. II. Edwards, but also the more detailed experiments 

 made by Mr. F. Merrifield and published with elaborate plates in the Transactions of the 

 Entomological Society of London for 1891 (p. 155) and 1892 (p. 33) (xxxvi). 



In comparing G. slossonicv with Hudson's description of avimucula, it seems most probable 

 that it is a melanotic form, due to. the colder and damjier situation of Francouia, X. H., which is 

 about 1,400 feet above the sea. In slnssoniw the thorax is lighter, the pale ocherous basal and 

 discal spots of arimacula are whitish gray in .s/osso/iuf, and the basal and middle lines of the 

 median band are swamped by the broad black-brown band of sldsvonkv; the hind wings of 

 slossoiiitv agree with Hudson's description of avimacula. 



The following account of its transformations is copied from Dyar (Psyche, vi, p. 503, Aug., 

 1893) : 



Egg (.'). — Heniisplierical, the base flat; smooth, sligbtly sbiiiy whitish green, the mieropyle round, small, black. 

 Under a half-ineh objective it is seen to be covered with irregular tlattened reticulations, not raised above the 

 surface of the egg, much as in Cerura, but more irregular, ranging in shape irom quadrilateral to hexagonal. 

 Diameter, 1.1 mm. Found oil a poplar leaf, deposited singly. I am not sure that this egg belongs to this species, as 

 it failed to hatch, but it was found with the larvie and probably belongs here. 



First larval stage. — Not observed. 



Scrund «tugc. — Head slightly bilobed, not shiny, pale green ; mouth whitish ; ocejli black ; width, 0.9 mm. Body 

 smooth, slender, without humps or tubercles, uniform pale green, not shiny, with a faint yellow subdorsal line. Xo 

 other markings 



Third xtage. — Only the cast head-case was observed, the width of which was 1.45 mm. 



Fourth stage.— yVidth of he.ad, 2.3 mm. Much as in the first part of the last stage. There is a moderately- 

 distinct, pale yellow, subdorsal line without other markings, or else traces of lateral and stigmatal yellowish lines, 

 the former broken, the latter continuous, but faint. Spiracles sra.all, faintly ocherous. As the stage advances.the 

 stigmatal lino becomes the most distinct, the others becomin.g faint. 



Fifth stage. — Head very slightly bilobed, somewhat flattened in front, uniform pale, sublustrous green, mouth 

 parts paler. .jaws black; width, 3.5 mm. Feet normal, all used in walking, concolorous with the body, the claspcrs 

 whitish. Body long and .slender, uoctuiform iu appearance, without humps ov tubercles; ])iliferous dots absent, the 

 hairs being reduced to mere rudiments. Color uniformly nonlustrous juile green, semitranspiirent, showing plainly 

 the pulsations of the dorsal vessels. An obscure, pale yellow, stigmatal line. Spiracles dull ocher. The larva 

 rests on a slight web on the back of the leaf, the head held out flat. 



As the stage advances the markings become much more pronounced. The head is mottled with white, especially 

 on each side of the clypeus; clypeus white centrally; a yellow line .appears on the side of the head from the base of 

 the antenuie behind the ocelli, in line with the stigmatal band when the insect is iu its normal position of rest. 

 Stigmatal line distinct, pale yellow, bordered above, very narrowly, with crimson on the thoracic segments, and 

 reaching nearly to the end of the .anal plate. Dorsal region whitish green, becoming almost white; subventral 

 region clear green, with yellow dots; spiracles orange, feet faintly tipped with vinous. There are faint traces of a 

 j-ellowish subdorsal line and one on each side of the dorsal vessel, but they become white and are seen as somewhat 

 more distinct parts of the general whitish dorsal shading. Still later the rudimentary piliferoiis dots become 

 surroumled with yellow. There are seven on each side above the sti.gmatal line, seven iu the subventral space 

 (where they appear more distinctly on account of the absence of white shading), and others on the venter of the- 

 legless segments. 



