X, D, 6 Baker: Studies in Philippine Jassoidea, IV 319 



IDIOCERINI 



Diagnostic synopsis of the genera. 



a\ Head very short and much wider than the very short and very broad 

 pronotum; vertex shorter at middle than at eyes, where its anterior 

 margin is strongly sinuate; face with width once and a half the 

 length, front far wider than long; supra-antennal ledge falling far 

 short of reaching eye; clypeus parallel-sided; tegmina very broad; 

 first anteapical cell confluent with median, the second being the only 

 closed anteapical; closed apical cells five, but with supernumerary 



subobsolete cells in apical portion of costal area Ipo Kirk. 



a^ Head, etc., not as above. 



6\ Scutellum, and clypeus at least in part, more or less tumidly elevated; 



upper lateral sutures of the front usually strong to the ocelli;" 



lorae acute above; scutellum very large, distinctly longer than head 



and pronotum together. 



c\ Head as wide as pronotum; appendix scarcely reaching apex of 



corium, and about as wide as second apical cell; vertex shagreened 



and slightly shorter at middle than at eyes; venation indistinct 



proximad of apical cross veins; first apical cell twice the width 



of fourth, which is far shorter than third; pronotum two and 



a half times as wide as long, its hind margin very slightly 



incurved; lorae shorter than clypeus and lying in same plane as 



genaj; supra-antennal ridge strongly sinuate, producing a 



distinct lobe next front; clypeus broader at base than at 



apex '. Iposcopus gen. nov. 



c'. Head usually wider than pronotum; vertex as long at middle as 



at eyes or longer; venation usually strong proximad of apical 



cross veins; outer apical cell in tegmina separated from outer 



subapical by a cross vein, thus three subapical cells; first apical 



cell about same width as fourth, which is about same length as 



third; pronotum less than two and a half times as wide as long, 



its hind margin strongly incurved; lorae longer than clypeus; 



supra-antennal ledge evenly curved, .not producing a lobe next 



front; clypeus usually distinctly broader at apex than at base. 



d}. Five apical cells in tegmina; first subapical cell about as 



large as second or as third; appendix scarcely reaching 



apex of corium and about as wide as second apical cell ; 



head finely shagreened; lorae lying in same plane as genae; 



frontoclypeal suture distinct Ipocerus gen. nov. 



cf. Four apical cells in tegmina; first subapical cell much smaller 

 than second or than third ; appendix surrounding apex of corium 

 and wider than second apical cell; vertex and upper part of 

 face cross striate; lorae tumidly elevated; fronto-clypeal suture 



obsolete Chunra Dist. 



b'. Scutellum and clypeus not at all tumidly swollen ; upper lateral sutures 



of front, usually not equally distinct near ocelli and near scrobe; 



scutellum of medium size, rarely as long ■ as, usually distinctly 



shorter than, pronotum and vertex together. 



c^. Outer apical cell in tegmina separated from outer subapical by a 



cross vein, thus three subapical cells ; vertex normally transversely 



wrinkled, usually very short and very broad; clypeus usually with 



