1955] 
Obraztsov — Amata pfeifferae Group 
33 
orange, third and fourth tergites with prsesegmental girdles 
of the same coloring, fifth tergite entirely orange; the cor- 
responding sternites with somewhat paler, almost yellow 
girdles; second sternite with yellowish scaling on the 
whole surface. Legs brown, only the bases of the interior 
side of the coxae yellow. Wings black-brown, shot with 
dark violet; spots orange. Length of the forewing: 14 mm. 
Forewing with six spots: one subtrapezoidal spot (m,) 
at the wing base supradorsad; a subquadrate spot (m_,) 
at the end of the middle cell; a larger, rhomboidal spot 
( m,i ) below it; an elongate-ovoid spot (m 4 ) between the 
veins R 5 and Mi near their base; the spots (m s and m f> ) 
on both sides of the vein M :< form a common roundish spot 
divided by the diffusely black-scaled vein. Hind wing with 
a basal spot stretching band-like from costa to dorsum; 
this band reaches about to the middle of the wing (in the 
middle cell about to its middle) and joins the distal spot 
which looks like an exterior tooth of the basal spot and 
occupies the small area below the middle cell and between 
the veins CUi and Cu 2 . The lower vein of the middle cell 
black-scaled ; a diffuse blackish dot in the orange spot, 
below the middle cell and separate from it. 
Male genitalia (fig. 4) : Uncus swollen before the 
pointed tip. Tegumen with the two large lateral appendages 
curved inward. The left valva with an undulate upper 
edge, a separate and angled apical part, the right one 
subtrapezoidal, shorter and much broader; both processus 
basales curved caudad, the left one much longer. 
Type: male, holotype, Lundu Mt., Kuching, Sarawak, 
Borneo, July 15, 1920, H. W. Smith leg. (Museum of Com- 
parative Zoology). 
From all known species of the pfeifferae group, borneo- 
gena differs in number of abdominal girdles, and also in 
genitalia. The forewing spots m t and m 3 of the new 
species are more widely separated than in pfeifferae, and 
the orange supradorsal streak is absent. The hind wing 
spots of borneogena are like those of acuminata, but not 
like those of pfeifferae, which latter has two distinct spots. 
The truncate tooth formed by the distal spot of the hind 
wing of borneogena differs from the more acute tooth in 
