1919 



2|Q Philippine Journal of Science 



superior frontal margin thus always lies below the apparent 

 upper anterior border of the head, which may not be at all ex- 

 tended above and cephalad of the superior frontal suture, or may 

 be strongly so as in the Tartessusaria. Some of these insects 

 possess a superficial resemblance to bythoscopids, and Walker 

 wrongly described various species of Tartessus and other genera 

 in Bythoscopus. But in all, including Tartessus, the ocelli are 

 far higher and very close to the eyes, and this and other char- 

 acters mark them as true jassids. In superficial habitus Krisna 

 presents a very remarkable resemblance to Gypona, so much so 

 that Kirkaldy described a new genus, Eogypona, in the Gypo- 

 ninaa, for one of its species. It has, of course, not the remotest 

 relationship to Gypona. In addition, the true Gyponinse (ex- 

 cluding the Penthimiina?) are exclusively American. 



A minor character common to this assemblage may be ob- 

 served in the lorte, the suture of which, above, usually does not 

 reach the frontal suture, but commonly ends in a more or less 

 radiate arrangement of minute wrinkles some distance from the 

 frontal margin. In rare cases this suture is subobsoletely ex- 

 tended and strongly recurved to the lateral frontal margin, 

 making the lora ear-shaped. Previous drawings, even those of 

 Signoret, are incorrect in this detail of structure. 



The jassids discussed above fall into three tribes as follows: 



Key to the tribes. 



a\ Head as wide as or wider than pronotum; frontoclypeal suture usually 



distinct; lateral pronotal carina very short. 



V, Pronotum strongly, narrowly rounded cephalad, and extending beyond 



anterior margin of eyes; ocellar area broad and usually transversely 



wrinkled; appendix of tegmina usually extending around apex, 



and very broad ^apically, rarely wanting as in Macroceps; ovipositor 



long, exserted; Pediopsis-like in form Tartessusaria. 



V, Pronotum not extended cephalad of anterior margin of eyes; ocellar 

 area narrow, usually once or several times sulcate; appendix of 

 tegmina usually extending only to apex or less, and broadest sub- 



apically; ovipositor little exserted Selenocephalaria. 



o s . Head distinctly narrower than pronotum; frontoclypeal suture obsolete 

 or subobsolete; ocellar area broad and transversely wrinkled and with 

 one or more transverse carinas above it; lateral pronotal carina (and 

 pronotum behind eyes in lateral view) long; ovipositor little or not 

 exserted; Gypona-Yike in form Stegelytraria. 



Distant names two of these tribes but gives no diagnostic char- 

 acters. He places Krisna in the Selenocephalaria, but Gessius, 

 which might easily be called a subgenus of Krisna, he puts in 

 the Tartessusaria. Several genera formerly placed in the Sele- 

 nocephalaria do not belong in this congeries at all, and a number 



