CHLORISSA; MESOTHEA; CHLOROCHLAMYS. By L. B. Proud. 
K1 
28. Genus: (llilorissa Steph. 
This Old-World genus (see Vol. 4, p. 24; Vol. 16, p. 27) is chiefly represented in the New World by 
Chlorochlamys and Chloropteryx, but a few North American species seen really to belong to it. They have, 
however, a shorter terminal joint to the $ palpus than in typical Chlorissa. Antenna of G ciliated. Hindtibia 
of G with 2 spurs, in $ typically with 4, though the proximal pair is sometimes ill-developed. Hindwing with 
the termen as a rule bluntly bent in the middle; costal vein anastomosing at a point (or scarcely more) near 
the base. 
Ch. (?) euchloraria Guen. (= euehloria Hulst). Of this species the type, described from coll. Bois- euchloraria. 
Duval, is lost, like most of his North American, and I have never been able to obtain any reliable information 
about it. The shape makes me doubtful of the generic position. “24 mm. Forewing acute at the apex, with 
termen elbowed, hindwing with a pronounced angle at the 3rd radial, the borders straight; both of a fine light 
applegreen above and beneath, the fringe white, slightly rosy. Forewing with a white line, hardly visible, 
straight, oblique, running from the middle of the inner margin to % costa. Frons prominent, but entirely 
denuded in my example. North America, one example.” 
Ch. pistasciaria Guen. (= insecutata Walk., superata Walk., pistaciata Pack.) (8 b). Of this species -pistasciaria. 
also the type is lost, but the accepted determination seems to be correct. The ground-colour should be pistachio- 
green, with costal edge and fringes reddish, but it is liable to discolour, like the rest of the group. The lines 
are weak, slightly darker than the ground-colour, edged with whitish, the antemedian sometimes obsolete. 
Said to be fairly common in the Eastern United States. 
Ch. subcroceata Walk. (= auranticolorata Streck.) (8 b) according to Walker’s type from E. Florida, subcroceata. 
has the wings slightly more rounded, the face slightly redder, the wings more discoloured with ochraceous-buff 
(beneath deep chrome) the line perhaps less crenulate, but I know no good material in either species, and am 
ready to accept, as Forbes has suggested, that both may prove to be one. The larva believed to belong to 
this species has been described by Dyar. Head, after the first stage, with pointed lobes, similar conical points 
on the prothoracic shield anteriorly; body slender, smooth, greenish-brown, thickly granulated with white, 
the lines obscure, a series of dorsal, intersegmental deep brown dashes on the 1st to 5th abdominal segments; 
anal plate with a pointed projection. Reared from the egg on Quercus coccinea; they sit erect, without spin¬ 
ning a supporting thread. The pupa hibernates. Distributed in the Eastern States. 
Ch. dyarii Hulst has usually been sunk to subcroceata, but in the recent “List of the Insects of New dyarii. 
York” it is treated as distinct, being found at Bellport in May- June, while subcroceata appears in late June 
and July. 16 mm. Thorax green, yellowish behind; abdomen washed with violet-red above; wings deep 
yellowish green, costa, termen and finge reddish violet; indications of lines, faint, broken and irregular; wings 
beneath much lighter yellowish green, base of forewing washed with reddish. Type from Long Island (?). 
Ch. (?) decipiens Warr. ( 8 b) resembles some of the species of Chloropteryx (especially punctilinea) and dedpieus. 
is evidently related to them, but has ciliate, not pectinate, G antenna; and as this is at present the principal 
distinction of Chlorissa from Chloropteryx; we quote it here. The hindlegs, however, are missing in all the 3 
known examples. Forewing with 1 st subcostal arising from the stalk of 2 nd—5th, anastomosing with costal. 
Underside with narrow terminal dark blotches at tornus of forewing and apex of hindwing. Carabaya, S. E. Peru. 
29. Genus: Mesotliea Warr. 
An offshoot of the North American Chlorissa, with small eye, rather short palpus and in both sexes 
simple, 2-spurred hindtibia; pectus and femora hairy. The two species, both North American, are very closely 
related. 
M. incertata Walk. (= oporaria Zell., gratata Pack.) (8 b). Delicate green when fresh, but very easily incertata. 
fades to an ochreous almost as bright as in Chlorissa subcroceata. Common in the Eastern States. 
M. viridipennata Hulst (8 b) represents incertata in the West, from Alberta and British Columbia to viridi- 
Colorado, whence came Hulst’s type. Larger than incertata, the vestiture perhaps more hairy. Larva with pennata. 
head bilobed, the lobes produced into pointed horns; prothorax with smaller, slenderer cones; body green, 
slender, pretty uniform, granulated; a red-brown dorsal line; anal plate produced into a cone behind, brownish 
on the sides. Has been bred from the egg on Salix (Dod), wild cherry, gooseberry and cottonwood (Dyar). 
The pupa hibernates in a slight cocoon. Imago in May and June. 
30. Genus: Chloroclilaiiiys Hulst. 
Essential characters as in Chlorissa, but with the antenna of the G strongly pectinate. Hindwing with 
distal margin rounded or only very bluntly angled, but connected by intermediates with the following genus, 
