PRASINOCHRYSA; XANTHYRIS. By L. B. Prout. 
117 
P. insulsaria Guen. (= placidaria Guen., invariata Walk., insularia Hulst, err. transcr.) (15 b). Antenna insulsaria. 
of the J with the shaft slender, normal. A further comparison with rudimentaria has been made under that 
species. The name-typical race has normally a fleshy tone, though there is some evidence of a colour dimor¬ 
phism analogous to that which is well known in some other Sterrhine genera, such as Dithecodes Warr. and 
especially Traminda Warr. (see Vol. 16, p. 52). —- ab. (?) persimilata Grote, described from New York, has persimilata. 
more green scaling, though I gather that it is more opaque than the whitish-green asthenaria. Evidence is 
somewhat conflicting, however, as to the degree of greenness in freshly-bred specimens of insulsaria; Packard 
sees in it “an almost imperceptible greenish tinge - ’. — insulsaria, which seems to overlap with the following 
in its range in Central America and the Antilles, spreads through the eastern part of North America from 
Texas and Florida to Maine. It was first bred from Celastrus scandens by Packard and (without specification 
of food-plant) by Belfrage in Texas. Hulst several years later gave Cassia chamaecrista and described the 
larva as cylindrical, slender, varying from yellow-green through orange to dark brown, with lighter dorsal and 
subdorsal and broad light lateral line and a fleshy ridge included in the latter; the pupa 10 mm in length, light 
translucent green to violet brown, its “upper end" nearly squarely truncate, with a sharp spine-like protuber¬ 
ance on each side, always of a violet colour, darkest in the dark pupae; it is attached by the tail to a slight 
button of silk on a leaf and with a silken girth as in Cosymbia. Flowers of Solidago have also been mentioned 
as a food-plant, but it is evidently a pretty general feeder and has recently obtained some notoriety as a po¬ 
tential enemy to corn (maize) crops; see Ainslie, Ohio Journ. Sci., Vol. 23, p. 89 —101, where it is shown that 
it prefers fresh corn silk to most of the substitutes offered it and that its coloration, though so variable, is pro¬ 
tective on that food. There is a succession of broods. asthenaria W alk. (= imparata Walk., tropicaria Schaus, MS., asthenaria. 
truncaria Edw.) (15 b). Distinguished by its delicate watery-green tinge and generally more distinct white 
lines, or at least the one just outside the postmedian dots. General in the Neotropical Region as far southward 
as Buenos Aires. The larva was found by Dr. Giacomelli (La Rioja) on Prosopis and Acacia, only in the green 
form (see Canad. Ent., Vol. 44, p. 369). 
P. numitoria Druce (15 b), founded on a $ from Guerrero, Mexico, is similar to asthenaria, but distin' numitoria. 
guishable by the straighter and more conspicuous outer white line and the almost complete lack of the dark 
markings. Mexico, Costa Rica and Panama. 
P. paranaria E. D. Jones (15 b), described as an Anisodes, is very distinct in its firm dark lines, paranaria. 
absence of median shade, etc. Castro, 1 $; until the <§ is discovered, its exact position in the genus cannot be 
fixed — possibly near archigetes. 
18. Genus: I*raslnoclirysa Warr. 
Palpus rather short, upcurved, 3rd joint in both sexes short. Antenna simply ciliate. Hindtibia in 
the d dilated, spurless, with strong pencil, tarsus abbreviated, with 1st joint swollen; $ with 4 spurs. Fore¬ 
wing with areole usually double, but liable to variation; 2nd subcostal arising from the cell. Hindwing with 
costal touching, or slightly anastomosing with, the subcostal at a point or slightly more, 2nd subcostal not 
stalked. The very distinct scheme of markings puzzled the early systematists, who described the species as 
Chrysauge, Numeria or Eurymene, while even Dyar in 1914 recorded the type species as a Pyrinia! The 
structure, however, shows nothing remarkable and the genus may well belong to the Semaeopus group; but 
as the genitalia show some resemblances to Xanthyris I have provisionally placed it at the beginning of the 
Cyllopoda group. Only two species are known. 
P. detracta Walk. (= eucharis Warr., nec Dm .) (15 c). The type of the genus and by far the commoner detrada. 
and more widely distributed species, extending from Panama to British Guiana and the Amazons; Walker’s 
original from Venezuela. — fructidora Th.-Mieg, from Peru, has about the size and shape of the type, but the frudidora. 
markings of the forewing heavy, almost as extended as in the following race, the proximal patch extending 
to about 1 mm from the costa. Perhaps most of the western forms belong here. — polydora subsp. n. (16 c). polydora. 
Small and relatively shorter-winged, rather heavily dark-marked, in particular with the patches at tornus 
broader in proportion to their length. Matto Grosso: Burity, 30 miles N. E. of Cuyaba, 2250 feet, July to 
October, 11 Tombador, 16 miles S. of Diamantino, 1500 feet, July and August, 4 all collected by 
C. L. Collenette, the type in the British Museum. 
P. quadriplaga Feld. (15 c), from the Guianas and Para, differs in the form of the dark markings and quadriplaga. 
especially in the presence of an apical patch on the hindwing. 
19. Genus: Xanthyris Feld. 
This and the 6 following genera have been treated as a separate tribe or subfamily Cyllopodicae (see 
Supp.-Vol. 4, p. 23) or Cyllopodinae, or (earlier) even their Geometrid affinities unrecognized; not rarely they 
