210 
Philippine Journal of Science 
1919 
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- 
ninse, for one of its species. It has, of course, not the remotest 
relationship to Gypona. In addition, the true Gyponinse (ex- 
cluding the Penthimiinse) are exclusively American. 
A minor character common to this assemblage may be ob-' 
served in the loras, 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 1 . Head as wide as or wider than pronotum; frontoclypeal suture usually 
distinct; lateral pronotal carina very short. 
b\ 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. 
b : . 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. 
* 2 . Head distinctly narrower than pronotum; frontoclypeal suture obsolete 
or subobsolete; ocellar area broad and transversely wrinkled and with 
one or more transverse carirue above it; lateral pronotal carina (and 
pronotum behind eyes in lateral view) long; ovipositor little or not 
exserted; Gypona - like 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 
