magnolim- 
bata. 
rhodocera. 
bombifor- 
inis. 
ye nates. 
felderi. 
aurantiaca. 
schausi. 
pentagona. 
crabronifor- 
mis. 
46 NEOTRICHURA; ISANTHRENE. By Dr. M. Draudt. 
tips. Tlie hyaline wings have a black base with a blue spot, black margins and veins. The black of the margin 
of the hindwing expands very much between the lower median vein and the anal angle. Distributed from 
Bolivia to Argentina. 
H. magnolimbata Dogn. greatly resembles the preceding, but it is somewhat larger; different by quite 
black, blue-reflecting antennae; the body is much more copiously spotted white: on the metathorax lies 
a large white spot margined by metallic blue, beginning from the 4th ring there are white lateral spots and 
on the ventral side 2 rows of spots. Forehips white bordered by blue, hind tibiae white-spotted. The black 
distal margin of both wings expands somewhat towards the apex. French Guiana in September. 
H. rhodocera Schaus has red antennae with yellow tips. Legs black with red tarsi; palpi black; beneath 
blue-striped. Head and thorax are black, on the collar there are some interspersed, blue scales; the black 
abdomen exhibits metallic violet-blue dorsal and lateral lines, at the first ring a yellow transverse line, and 
at the 2nd ring laterally a white spot and a yellow line; on the venter a white spot. Forewings yellowish 
diaphanous, along the costal margin brownish; veins black except the 2 uppermost subcostal veins which are 
of a reddish tinge; fringes dark brown, the distal margin of the hindwing near the anal angle black. Expanse 
of wings: 38 mm. Chiriqui. 
H. bombiformis Rothsch. The whole body is in the $ olive-brownish, the last rudimentary segment 
orange-reddish, from which long-haired, forcipated valves are projecting; legs brown; antennae black. The 
$ differs by a quite orange-yellow under surface and a well-developed, last, orange abdominal segment. Wings 
yellowish hyaline, base, distal and proximal margins, as well as the apex of the costal margin are black. — 
From Peru (Marcapata). 
11. Genus: IXeotrioluira Druce. 
The long cell of the hindwing from the lower angle of which the lower radial and lower median vein 
rise unpetioled, separates the only species from Homoeocera ; in the $ the strongly convex costal margin of 
the hindwing is turned over and provided with a cover of white, woolly hair. 
N. penates Druce (= dukinfieldia Schaus) (11 b) has a black body with metallic blue-green spots on 
the forehead, at the base of the abdomen, as well as lateral and sublateral rows of spots. The hyaline wings 
have broad black margins, in the inner margin there are 2 oblique brownish streak-spots. Distributed from 
Panama to Paraguay. 
12. Genus: Xsantfiirene Hbn. 
Rather many species form this group of small and large, wasp-like animals. The colours are prepon¬ 
derantly yellow and black, often there are blue metallic spots. The wings are almost entirely hyaline, with 
a narrow or without a margin. The antennae are somewhat thickened in their middle part, shortly doubly 
ctenodont. The palpi project beyond the head. The cell of the hindwing, owing to the discocellular running 
very obliquely, is so small that it is not visible from above. On the forewings the upper median vein rises far 
away from the lower cell-angle from which both the lower radial veins rise likewise separately, or also from 
the same place. 
I. felderi Druce (9 1). The body one-coloured yellow; the neck, anterior margin of the collar, one 
transverse streak each on the pro- and mesothorax, a longitudinal streak on the metathorax, and small spots 
quickly decreasing in size on the dorsum of the first abdominal segments are black. At the articulation of the 
forewings there is a minute, white, black-margined spot; antennae black. Wings hyaline with yellow costal 
and proximal margins. The distal margins and an extensive apical spot are black. Distributed from Mexico 
through Guatemala, Costa Rica as far as Ecuador. The colour of the body varies from light greenish-yellow 
to brownish orange-yellow. The latter variety of colour may be separated as aurantiaca form. nov. (9 1). 
I. schausi Rothsch. (10 g) differs from the allied felderi by the quite one-coloured, deep orange-yellow 
body without any black markings, and it may be merely an unspotted form of aurantiaca. Mexico (Huatusco). 
I. pentagona Schaus (9 1) differs from the preceding by the absence of the black apical spot of the 
forewing and by the broad black rings of the last 5 abdominal segments and the much smaller size. The forehead 
is whitish, between the antennae a black spot; collar and shoulder-covers black striped and margined; thorax 
with blue-black median stripes. Costal and proximal margins of the hyaline wings with reddish stripes, fringes red¬ 
dish. Peru. 
I. crabroniformis St.gr. (9 1) has scarlet antennae and legs; the former are at the base of the shaft 
often more or less black. Head and thorax are black with yellow markings. The steel-blue abdomen exhibits 
