Publ. 16. XI. 1936. 
1185 
HYALOSCOTUS. By M. Gaede. 
about 15 mm. more pointed towards the end, covered with protuberances. The larva of the form platensis 
is doing much harm in Argentina. It feeds on all the home and imported foliage trees, also on fruit-trees. 
Only conifers and Eucalyptus are spared. 
Oi. abboti Grt. d sand-brown with a hyaline stripe at the cell-end of the forewing, narrowly paler at abboti. 
the distal margin. A blackish streak at the base of vein 1. being absent in kirbyi and its forms, and a broad 
shadow from the cell-end to the distal margin. <$ 30 mm. Florida. — The bag is about 35 mm long, densely 
spun with transversal leaf-stalks. 
Oi. townsendi Towns. The cell in the forewing “solidly" blackish brown, also without the light cross- townsendi. 
vein blackish brown. Veins 8 + 9 stalked, also veins 4 + 5 stalked in most of the specimens. bonniwelli bonniwelli. 
Barnes <£• Benj., described as a species, is a form oi townsendi according to Jones. Ground-colour more smoke 
brown, the marking less distinct, townsendi is said to have a pale streak at the anterior edge of the cell on 
the forewing. According to Jones, both the forms differ little from abboti. According to Barnes and Ben¬ 
jamin, the body and wings are yellowish brown. Forewing with a black patch at the base of vein 1. The cell 
is black, more faded behind it, the cross-vein intensely white. Similar to abboti , but larger, lighter, the hind¬ 
wing rounder. 42 mm. From New Mexico, Texas. The cases of both forms are not different; the temperature 
and other influences decide which form emerges. - The bags are longer than in abboti , longitudinally covered 
with leaves and leaf-stalks. 
Oi. dendrocomus Jones (169 e) is the largest species, similar to townsendi. The forewing shows veins dendroco- 
8 + 9 stalked, but 4 and 5 mostly not stalked, thus contrary to townsendi. Veins 4 and 5 of the hindwing are 
mostly neither stalked. Only the lower part of the cell on the forewing is intensely blackish brown, not the 
whole cell. The shadow behind the cross-vein is very short, so that the marginal area is not interrupted by 
it. Nothing is mentioned about the ground-colour of both wings; it will be similar to that of townsendi. 45 to 
48 mm. Arizona. The $ is 46 mm long, 10 mm strong, dull yellowish white, the head and the thoracal dorsum 
darker yellow. — The larval bag is enormous, 80—130 mm long, clad with long leaf-stalks, and thereby about 
20 mm thick. The bags of the d+ are without these stalks in the lower thirds. On Robinia. Platanus, Tamarix. 
Oi. basiger Wkr. The species was described in 1866, since when no more specimen seems to have been basiger. 
found. Body rusty brown. Forewing spotted brown, with black dots at the costal and interior margins. A 
black spot near the base, next to it a triangular silvery spot and a few silvery dots above the inner margin. 
The shape of the wings and the long abdomen are mentioned in the description, but owing to the silvery spots 
it is somewhat doubtful whether the species belongs to the Psychidae. 58 mm. Bogota. 
The two following species have not completely scaled wings. In orizavae the margin is semidiaphanous, in toumeyi 
both wings are almost quite hyaline. 
Oi. orizavae Schs. Forewing smoke grey, almost black at the inner margin, the exterior half of the orizavae. 
cell likewise almost black. A white spot at the cross-vein as in kirbyi , but less notched. Distal margin semi- 
diaphanous. Hinclwing smoky grey, broadly blackish at the inner margin. The distal margin from vein 2 to 
the apex semidiaphanous. 39 mm. Orizaba (Mexico). 
Oi. toumeyi Jones (169f) is very similar to Thyr. ephemeraeformis. Antennae brown, broadly pec- toumeyi. 
tinated, tips bare. Anterior tibiae with a fine tibial leaf, half the length of the tibia itself. Abdomen long and 
delicate, projecting far beyond the hindwing. Veins 4 + 5 stalked in both wings, veins 8 + 9 also short- 
stalked on the forewing. Wings hyaline, the veins yellowish brown, only the inner margin with brown hair, 
the costal margin of the hindwing with dark scales. 28—32 mm. Tucson (Arizona). — The bags very common 
on Acacia, 55—60 mm long, exceptionally to 100 mm and 10—12 mm thick on two fifths of their length, then 
growing thinner, greyish white, irregularly spun with pieces of leaves and stalks. 
15. Genus: Hyaloscotus Btlr. 
Wings broad, vein 6 absent in both wings, by which it is distinguished from Platoeketicus. Inner- 
marginal vein of forewing with a spur to the inner margin, fumosa exhibits a long thin thorn on the anterior 
tibiae, which is not yet ascertained in pithopoera. 
H. fumosa Btlr. ( fragmentella H.Edw., coniferella H.Edw.) (169 f). This synonymy is probably fumosa. 
correct according to Jones, but it must yet be ascertained. The name fragmentella is prior to fumosa. The 
forewing of fumosa shows veins 8 + 9 short-stalked, but 4 and 5 are mostly not stalked. The species is deli¬ 
cately built, originally described as a Lithosiid. Wings rounded, scantily scaled, more densely scaled only at 
the veins and margins. Body blackish with long white hair. Wings smoky grey, the forewing somewhat darker 
than the hindwing. 26—28 mm. California. 5 were found by Lord Walsingiiam. 50 years ago, they are 
the only specimens known to this day. — The bags are 20—25 mm long, 5 mm thick, longitudinally covered 
with fine remnants of plants. 
H. pithopoera TJyar. Wings scantily scaled, grey, without any marking. 20 mm. From Idaho, Blue pithopoera. 
Mountains (Wash.). — The bag is longitudinally spun with small pieces of grass. Size not mentioned. 
VI 149 
