XI. D, 6 Muir: Additions to Delphacidae (Hemiptera) 379 



Perkinsiella bakeri sp. nov. 



Male. — Macropterous form; structure typical. Vertex and 

 face brown, lighter spots coalescing and forming small bands 

 across face, clypeus and antennae darker brown ; pro- and meso- 

 notum light in middle, dark brown outside of lateral carinse ; rest 

 of thorax, coxae, femora, and abdomen dark brown; tibiae and 

 tarsi light brown, spur on hind tibiae dark brown on outer side. 

 Tegmina hyaline, fuscous brown, lighter over basal half, dark 

 over apical half, especially distad of clavus ; a triangular, lighter 

 mark at end of costal cell and a smaller spot at apex of each 

 apical cell, a small dark spot at apex of claval margin, rest of 

 claval margin white or yellowish white; veins closely studded 

 with black granules ; wings hyaline, veins dark. 



Pygophor slightly compressed laterally, ventral edge medially 

 produced into a small plate which is bifid at apex; at each side 

 of base of plate the pygophor is slightly depressed ; anal segment 

 with a long, thin, inwardly curved spine from each ventral 

 corner, spines reaching across pygophor; genital styles small, 

 basal portion spindle-shaped, slightly flattened, apex drawn to 

 a point, which is at right angles to basal portion. 



Length, 2.7 millimeters ; tegmen, 4. 



Female. — Macropterous form, similar to male. Brachypter- 

 ous form: Heavier in build than the male, especially the abdo- 

 men, also lighter in color; tegmina reaching about one fourth 

 from apex of abdomen, hyaline, veins with brown granules, 

 margin of clavus whitish with dark mark at apex; wings rudi- 

 mentary. 



Length, 4 millimeters ; tegmen, 4.5. 



This species is near P. amboinensis, but the genitalia are very 

 distinct; it can easily be distinguished also by the dark lateral 

 margins of pro- and mesonotum. 



Luzon, Laguna, Los Baiios {Baker, Muir) , on sugar cane and 

 sorghum. 



Perkinsiella saccharivora sp. nov. 



Male. — Macropterous form; structure typical. Antennae, cly- 

 peus, and frons between eyes dark brown, frons below eyes, 

 genae below antennae, and a few small spots between eyes light 

 brown or yellowish; two small dark spots occur at apex of 

 frons; vertex and median portion of pro- and mesonotum light 

 brown or yellow, lateral portions dark brown ; front and middle 

 coxae, front femora, a ring around front tibiae, and the front 

 tarsi dark brown, spur slightly darker along edge ; abdomen dark 

 brown. Tegmina hyaline, all anterior of media colorless, all 



