98 
MEMOIRS OF THE NATIOISTAL ACADEMY OF SCIENCES. 
it as the type of a new genus, allied to, but distinct from, Glnphisia, owing to the notable differ- 
ences in the venation, as well as the presence of a dorsal tuft and other characters 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 
Glnphisia avimavula Hudson, adding that !Mr. Neumogen’s ^‘•Melia danbyV^ is referable to the same 
genus, but his name ‘^Melia” is preoccupied. Since then I have reexamined Edwards’s type of 
G, sm'ra,and have received from Mr. Dyar a specimen of G, lintneri, 3Ir, Dyar also wrote me as 
his opinion that the species of Ceruridia or Melia (Euuielia) are not generically different from 
Glnphisia, as he has collected G, sevcra in the Y'osemite Valley, Cal. 
As the result of my studies, esi)ecially of the venation, I am inclined to divide the genus 
Glnphisia into two sections and to believe that in the forms mentioned below we have a number 
of climatic or temperature varieties of a si)ecies allied to G. lintnen (originally referred to 
Dasychira by Grote), and which is common to both the Atlantic and Pacitic coasts. 
Of all these forms the variety slossonid' is the most remarkable, from its very dark markings, 
and 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 xjretty well established from the remarkable results 
obtained not only by Weismann and W. 11. Edwards, but also the more detailed experiments 
made by Mr. F. Merrifield and publislied with elaborate i)lates in the Transactions of the 
Entomological Society of London for 1891’ (p. 155) and 1892 (]>. 33) (xxxvi). 
In comparing G, slossonUe with iliidson’s description of arimacula^ it seems most probable 
that it is a melanotic form, due to the colder and damper situation of Franconia, N. H., which is 
about 1,409 feet above the sea. la slossoniw the thorax is lighter, the pale oeherous basal and 
discal s]K>ts of aeimacula are whitish gray in slossoniw, and the basal and middle lines of the 
median band are swAmped by the broad black-brown band of slossoiiuc; the hind wings of 
slossoniw agree with Hudson’s description. of arimacula. 
The following account of its transformations is copied from Dyar (Psyche, vi, p. 503, Aug., 
1893): 
Egg {f ), — Heuiisphericaf the base flat ; smooth, slightly shiny whitish green, the micropyle round, small, black. 
Under a' half-inch objective it is seen to be covered with irregular Ihittened reticulations, uot raised above the 
surface of the egg, much as in Cerura, but more irregular, ranging in shape from quadrilateral to hexagonal. 
Diameter, l.l mm. Pound mi a i»oplar leaf, deposited singly. J am uot 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. 
Head slightly hilohed, not shiny, pale greeu; mouth whitish ; ocelli black; width, 0.9 mm. Body 
smooth, slender, without humps or tubercles, uiiilbriu x>ale green, not shiny, with a faiut yellow suhdorsal line. No 
other markings. 
Third stage . — Only tho cast head-oaso was observed, the width of which was 1.45 mm. 
Fourth stage . — Width of head, 2.3 mm. Much as in tho first part of the last stage. There is a moderately 
distinct, pale yellow, subdorsal lino without other markings, or else traces of lateral and stigmatul yellowish lines, 
tho former broken, the latter continuous, but faint. Spiracles small, faintly oeherous. As tho stage advances the 
stigmata! line hecoraes the most distinct, tho others becoming faint. 
Fifth stage . — Head very slightly bilobed, somewhat fiatteued in front, uniform pale, suhlustroiis greeu, month 
parts paler, jaws black; width, 3.5 uim. Feet normal, all used in wjilking, concoloroiis with the body, the elaspers 
whitish. Body long and slender, uoetuifonu in appearance, without liumps or tubercles; piliferous dots absent, the 
hairs being reduced to mere rudiments. Color uniformly uonlustrons pale green, semitransparent, showing plainly 
tho jiulsatious of tho dorsal vessels. An obscure, x>alo yellow, stigmata! line. Siiiracles dull ocber. The larva 
rests on a slight web on tho back of the leaf, the head held out Bat. 
As the stage advances tho markings become much more pronounced. The head is mottled with white, especially 
on each side of the clypeus; clypens white centrally; a yellow line api^ears on the side of the head from the base of 
the anteume behind the ocelli, in lino with tho stigmatal baud when the insect is in its normal position of rest. 
Stigmatal line distinct, pale yellow, bordered above, very narrowly, with crimHon on tho thoracic segments, and 
reaching nearly to the end of the anal plate. Dorsal region whitish green, becoming almost white; suhventral 
region clear green, with yellow dots; siriraclea orange, feet faintly tipped with vinous. There arc faint traces of a 
j'ellowish suhdorsal line and one on each side of tho dorsal vessel, but they become rvbite and are seen as somewhat 
more distinct parts of the general whitish dorsal shading. Still later the riulimeutary piliferous dots become 
surrounded with yellow. There are seven on each side above the stigmatal line, seven in tho suhventral space 
(where they appear more distinctly on account of the absence of white shading), and others on the venter ot the 
legless segments. 
