1094 
MEGALOPYGE. By Walter Hopp. 
undulata. M. undulata H.-Sch. (= fuliginosa Moore, vulpina Schs.) (162 c) varies extraordinarily in size, colouring 
from olive brown to blackish brown and in the intensity of the white markings in both sexes; it Avas observed 
that uniformly dark brown qB may belong to $5 which are much lighter and provided with abundant white 
markings, whereas on the other hand the brightly coloured do sometimes emerge with plainly dark broAvn 
$$ from the same breed. South-Eastern Brazil. The much smaller, more distinctly marked specimens from 
vulpina. Argentina are -— vulpina Berg (162 d), forming regidar transitions to amita Schs. —- sevarina Schs., described 
sevarma. f rom Paraguay, is closely allied to undulata. The <$ has paler hindwings and the $ is broader and darker coloured. 
— The larva of undulata, according to Jones, with black, white and brownish ochreous spatulate hair, lives 
on Guava (Sao Paulo) and other plants. Cocoon in a dense web into which the larval hair are intermixed. 
uruguayen- M. uruguayensis Berg (162 d). Head, thorax and abdomen brownish ochreous, intermixed with white. 
*7s. \yi n g S thinly scaled, with indistinct white markings, especially in the cell. Uruguay, Argentina. —- A form 
with more distinct white markings, especially white veins and more extensive Avhite colouring of the cell of 
ctiacona. the forewing, Avhich shows a large dark spot at the end, has been denominated — chacona Schs. (162 d). Prom 
the Chaco in Argentina. 
lanceolata. M. larsceolata Dogn. $ with a brownish ochreous head and body, blackish legs. Forewing brownish 
ochreous, paler in the lower median area, the costa and the anterior part of the basal area blackish; the cell 
is Avhite and forms the point of a lance, the point being turned inward. Two white distal-marginal lines ap¬ 
proach each other at the apex. Hindwing white, feebly brownish. La Rioja, Argentina. 
Inca. M. inca sp. n. (162 d). Head ochreous, white between the antennae. Thorax, abdomen and legs ochreous, 
tibiae and tarsi black, white-haired on one side. Forewing brown, costal area dark brown; marked with white 
are: the costa, the anterior and posterior edges of the cell as well as the media of the cell with fine white hair, 
the cell-end blackish, a broad white spot at the costal apex. Hindwing broAvn, lighter at the base. $ un¬ 
known. Peru: betA\ r een Lima and the Chanchamayo (A. M. Moss). Type in the Tring Museum. 
Defoliata- series. 
dcfoliata. M. defoliata Wkr. (162 e). We figure a specimen corresponding to the type. Mexico. The species has 
been wrongly determined by Dyar and corresponds approximately to his trujillina. It forms transitions to 
trujillo. —» trujillo Schs. (162 e) which is to be regarded as the darkest coloured form of this series. Much lighter coloured 
agesistrata. than defoliata , however, is — agesistrata Drc. (162 e) which might correspond again to Dyar’s codiopteris. 
Darker specimens than the figured Guatemala-specimen occur of agesistrata, and in nature there may be trans¬ 
itions from the lightest agesistrata to the darkest trujillo. The type of Druce is a badly preserved $ from Guate¬ 
mala, according to which the author determined later on a $ evidently belonging to this form. Whatever Druce 
denoted as agesistrata later on, seems however to belong partly to ornata Drc. Mexico, Guatemala. 
A Mexican form Avith a still more extensive brightening is allied to agesistrata. It is the form which 
Dyar determined as defoliata by mistake and which has thus remained without a denomination; it may be 
dyari. called: —- dyari nom. nov. (162 a). The distal-marginal area of the foreAving is distinctly defined light yellow, 
the basal area brown, blackish t.OAvards the costa. 
The form dyari is of special importance, because it represents the Mexican edition of the oldest species 
xanthopasa. described of this group — xanthopasa Sepp from Dutch Guiana, of which no specimens are at hand. The Guiana- 
species chiefly differs from its Mexican form in the darker brown thorax and abdomen which are light yellow 
spotted with broAvn in dyari. Sepp figured only the <$<$', the $$ might be identified with pellita Felder (from 
French Guiana), the figure of which could not be reconstructed. — Finally we may mention the occurence of 
a form of the defoliata- series also in South Brazil, from Sao Paulo, “Sierra de Cubatao”. Head, thorax and 
abdomen light brown, foreAA'ing almost similar to that of agesistrata , though with a smaller white basal spot, 
hindwing intensely brown near the inner margin. 
Tavo melanistic aberrations of Megalopyge-s pecies of the xanthopasa -group are at hand 
from the Tring Museum, one of which Ave figure. Here the wings are completely black, as Avell as the legs and 
the abdomen, but the latter with a light yellow anal tuft. Head and thorax brownish ochreous, the thorax 
Avith a light yellow saddle at the base. This aberration the relation of which to one of the many chromatic forms 
melaina. can no more be ascertained owing to the black cover of the Avings may be named —- ab. tnelaina n. f. (162 f); 
Para (M. Moss). The other aberration was also collected by M. Moss on the LTpper Amazon R. and has much 
narrower wings which are dark brown like the thorax and abdomen. The thorax has a lighter tuft at the base, 
