192 
BOMBYCIA; BRACKYLOMIA; LITHOLOMIA; HILLIA. By Dr. M. Draudt. 
curvifascia. 
thula. 
eld a. 
rectifascia. 
ony china. 
populi. 
albidior. 
contrasta. 
discolor. 
napaea. 
umbrifas- 
ciata. 
32. Genus: ISombycia Stph. 
Proboscis developed, eyes comparatively small, antennae pectinate, thoracal covering like in the pre¬ 
ceding genus, anterior tibia without a claw at the end. The abdomen exhibits small tufts on the first rings. 
Of. also Vol. Ill, p. 122. 
B. curvifascia Sm. (27 i). Forewing brownish-grey with a black basal ray, indistinctly double trans¬ 
verse lines with vein-streaks behind the distal line, and whitish maculae, an elliptic ring-macula, the reni- 
form macula produced on the median towards the base, the whitish undulate line proximally bordered with 
brown. Hindwing light brown with a dark subterminal band. California. 
B. thula Streck. has light brown forewings intensely suffused with black, with a black basal ray and 
black transverse lines being bordered with a yellowish-grey on the averted sides; the maculae are very large, of 
the ground-colour, in grey rings and surrounded by black; the undulate line consists of small grey spots 
with black sagittary streaks before them. Hindwing blackish-brown. Expanse of wings: 25mm. Canada. 
B. elda French (27 i). Forewing brownish-grey, in some places irrorated with brown, with a black 
basal ray and a white spot above it, the transverse lines edged with whitish, the anterior line being double, 
and with whitish maculae irrorated with brown; before the whitish undulate line brown irroration. behind 
it at the anal angle a blackish-spot. Hindwing light brown, towards the margin darker. California. 
B. rectifascia Sm. (27 k) has more bluish-grey forewings, at the costal base and in the reniform and 
coniform maculae irrorated with ferruginous reddish, with double transverse lines filled up with whitish, and 
an intense black median line, a somewhat lighter subteiminal area, before the undulate line irrorated with 
reddish-brown. Hindwing dingy white, veins and margin brownish-grey. California. 
B. onychina Gn. is very similar to the palearctic viminalis (Vol. Ill, p. 122, pi. 29 i, k); it is greyer, 
with a much larger ring-macula, a reddish-tinted reniform macula; instead of the undulate line there are 
3 large, quadrangular, dark spots at the costal amrgin, in the centre of the distal margin and at the anal 
angle. United States. •— The larva is grey, watered with red-brown, with black V-spots on the dorsum, 
and a broad white lateral line hued with reddish. It lives on Chamaecistus. 
33. Genus: Rraeliyloinfa Hmps. 
Similar to the preceding genus, but with still smaller, somewhat reniform eyes and a prependorately 
scaled thorax with tufts in front and behind; the G antennae are serrate; the abdomen exhibits a tuft only 
on the first ring, on the others lateral hair-tufts. The forewing is short and broad. •— The genus is purely 
American. 
B. populi Streck. (27 i) is rather a common species and very variable. Forewing greyish-white, thickly 
strewn with black and in some places irrorated with orange-brownish,in the same way the transverse lines 
are bordered, the anterior line being almost straight; maculae of medium size. Hindwing light reddish- 
brown. — ab. albidior Strd. (= ab. 1 Hmps.) (27 k) is more white, very scantily orange-scaled, with an ex¬ 
tinct blackish median band, and whiter hindwings. — ab. contrasta Strd. (= ab. 2 Hmps.) has scarcely orange 
scales, the basal half is blackish, defined towards the white distal half by a distinctly marked black median 
band. Canada to Colorado. 
B. discolor Sm. (27 k). Forewing ochre-yellowish, in some places strewn with black; transverse lines 
single, black, the posterior line hardly curved near the reniform macula; macula ochreous, dark-centred; 
postmedian area almost black, the undulate line itself black, interrupted. Hindwing whitish, at the margin 
brownish. New Mexico. 
34. Genus: fjithofiomia Grt. 
Separated from the preceding genus by the admixture of hair on the thorax and a tuftless abdomen. 
The eyes are likewise small, but round; G antennae ciliated. Only 1 species: 
L. napaea Morr. (27 k) has grey forewings strewn with blackish-brown, with black, double, crenu- 
late transverse lines, between the white-ringed maculae with a blackish-brown median line; the white un¬ 
dulate line is on the proximal side darkened by blackish-brown. Hindwing brownish-grey. Canada to Cali¬ 
fornia. •— umbrifasciata Blackmore (33 h) has the central area behind the median line darkened in the shape 
of a band. British Columbia. 
35. Genus: Hlllia Grt. 
Like the preceding genus, but beside the tufts on the prothorax and metathorax also with hair-tufts 
on the frons and vertex, as well as on the shoulders. The eyes are larger. American, except H. iris living 
also in the palearctic north. 
