XV, 6 
Muir: Malayan Delphacidas 
525 
mina black or very dark brown over basal half, hyaline over 
apical half, veins the same color as membrane, granules very 
small. 
Pygophor slightly compressed laterally, medioventral edge 
with a single small spine; anal segment with a large spine from 
the left side; genital styles small, slightly curved, broadest at 
base, apex acute; aedeagus not visible externally and not dis- 
sected out. 
Length, 1.5 millimeters; tegmen, 2.3. 
Female . — Similar to the male. 
Length, 1.7 millimeters; tegmen, 2.3. 
Luzon, Bataan Province, Mount Limay {Baker), 1 male: La- 
guna Province, Mount Maquiling {Baker), 1 female. 
Genus AECOFACIES Muir 
Arcofacie s Muir, Canad. Ent. (1915) 261, 270, 320. 
Arcofacies penangensis sp. nov. 
Male . — Width of vertex at base double the length, base nearly 
double the width, of apex; length of face 1.5 times the width, 
sides slightly arcuate; antennae not reaching base of clypeus, 
second joint 1.5 times length of first. In lateral view the cly- 
peus at right angle to face, apex of face projecting slightly 
beyond clypeus; mesonotum considerably arched. Hind femora 
short, not reaching beyond apex of abdomen; tibiae longer than 
femora, tarsi much shorter than tibiae, first tarsus subequal in 
length to other two together, spur small, about as long as first 
tarsus, fairly broad, thick, a tooth at apex but none on hind 
margin. Tegmina acutely tectiform, compressed beyond apex 
of abdomen, costal margin shallowly emarginate beyond apex 
of abdomen, apex acute. 
Ochraceous buff ; hind legs slightly fuscous, abdomen bright 
yellow with a few, small, black spots on sternites, chestnut brown 
over pygophor and genital styles; tegmina chestnut brown, 
darkest over basal third, a clearer space along middle of costa 
at the emargination, a dark mark at apex of each apical vein, 
a small one at apex of claval vein, at fork of cubitus and fork 
of subcosta and radius, veins the same color as membrane, with 
numerous small, light granules. 
Pygophor round with a small opening, no distinct dorsal 
emargination, anal segment short, exposed, without spines, anal 
style large, lanceolate; genital styles slightly curved, flattened, 
margins subparallel, apex truncate and produced into a quadrate 
process on inner margin. 
168743—3 
