1074 
MICROCLADIA; MICRORAPE. By Walter Hope. 
ma 
pygmaca. 
pusilla. 
Santiago. 
signata. 
carnet a. 
filata. 
gnathata. 
cristaia. 
jasminata. 
nivea. 
hippo- 
potama. 
minuta. 
simplex. 
V. ma Dyar (160 a). Scaled greyish-brown, all the veins finely lined white, fringe white. Forewing with 
a white spot at the end of the cell. Hindwing with a white basal area. Abdomen greyish-brown, thorax inter¬ 
mixed with white. Head whitish, antennae light, with a whitish shaft, broadly pinnated. Legs white. Expanse 
of wings: <$ 154A mm. Peru and Lower Amazons, probably more widely distributed. 
3. Genus: Microcladia Hopp. 
Veined like Vescoa, but the 1st radial branch of the forewing is free. Distinguished from Microrape 
by a paired, short, bivalve uncus. White dwarfish species. The two species hitherto known are distinctly 
separable by the male sexual armature. 
M. pygmaea Iiopp is purely white, with a faint silky gloss, the costa brownish on the basal half of the 
forewing beneath. The completely developed 10th segment contains, as a sternit-appendage, a free, tongue¬ 
shaped, not paired gnathos. Sacculi distinctly developed. Mexico. 
M. pusilla Hopp exhibits a more intense silky gloss, the basal half of the forewing beneath with a blackened 
costa. The gnathos is only indicated by the sternit being more intensely chitinized. Saccidi extremely small, 
knob-shaped. Rio de Janeiro. 
4. Genus: Microrape Dyar. 
Veined like Microcladia from which it differs in the not paired, well developed uncus the shape of which 
varies from one species to the other. The species differ besides in the very differently shaped appendages of 
the genital segments. The American primeval forests probably contain yet many undiscovered species. White 
pygmean species. Only two species are known hitherto, bearing blackish markings on the white forewings: 
M. Santiago Hopp has a smoky grey angular mark at the cell-end of the forewing and is brownish also 
at the inner margin and apex of the forewing. Expanse of wings: 10 mm. South Colombia. 
M. signata Hopp (160 a) with an expanse of 12 mm shows a broad feeble black band from the centre 
of the inner margin almost to the centre of the veins 4—5 of the forewing, terminating in a black spot; next 
to it there is another black spot in the centre of the cell, so that the end of the cell represents a blank white 
spot. Irregular blackish dusting at the inner-marginal area and below the cell, at the apex, at the centre of 
the distal margin, and at the costal area of the forewing. Hindwing and body white. From the Lower Amazons. 
The two species differ also in many details of the genital armatures; Santiago has a well developed scent-organ 
on the tegumen before the uncus, in signata it is absent. 
As to the following purely white species we must consider that considerable differences in size may 
occur within the species, for instance the forewing may be from 6% to 9 mm long, so that it might easily lead 
to mistakes, if we were to state the exact sizes of these pygmean species. 
M. caniela Hopp , from South California, exhibits intensely glossy, somewhat prolonged forewings with 
transverse stripes. 
M. filata Hopp, from Bolivia, Colombia and the Amazons, is recognizable by long filiform sacculi which 
frequently project from the anal end. 
M. gnathata Iiopp, from Peni and the Lower Amazons, has rather narrow wings and a broad arched 
gnathos. 
M. cristata Hopp, from South Brazil, exhibits tufts of chitinized, narrowly lanceolate listels on the 
tegumen. presumably representing a scent-organ. 
M. jasminata Dogn. (= tenuis Hopp), from South Ecuador, Bolivia, and Peru. The wings show a slight 
greenish tint; the species is characterized by a hooked tapering uncus, very narrow long delicate harpes and 
.likewise delicately chitinized sacculi with very broad ends. 
M. nivea Hopp (= sycophanta Dogn.), from Bolivia and Peru. The clumsy curved uncus is dorsally 
set with spikes, the harpes are coherent by a high chitine-wall behind which the small club-shaped sacculi 
are situate. 
M. hippopotama Hopp , from Costa Rica, Colombia, and the Amazons, has rather broad short wings, an 
almost straight uncus, double harpes, and hollow-shelled sacculi with tapering ends. 
M. minuta Druce, from Panama and Colombia, resembles a small Norape in its habitus. The harpe is here 
a short pointed dent, the sacculus is terminally incurved, bicuspid. 
M. simplex Hopp, from Peru, lacks the harpes, the sacculi are similar to those of minuta, but with one 
point. 
