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, medio ventral 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 ARCOFACIES Muir 



Arcofacies 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; tibiee 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 



