xv, 2 Baker: The Genas Krisna ( Jassidse ) 213 
All of this means that no sound classification of the species 
(as in most jassids) can be based on colors, but that detailed 
study must be made of all important features of the external 
anatomy. Nor does it avail in the least to build up species de- 
scriptions by repeating characters common to all or even part 
of the species in the genus. All of these species are long oval 
in outline and strikingly gyponoid in form, with the vertex very 
bluntly angulated or rounded between the eyes (it may be quite 
different in the sexes) ; the face and the vertex variously rugose 
and wrinkled ; the pronotum, except anteriorly, thickly and finely 
cross striate; the scutellum having a strongly curved discal 
furrow, before which the surface is rugose, behind it, cross 
wrinkled; and the tegmina more or less thickly punctate. The 
number and the position of the supernumerary veins vary in 
the same species. The pronotum always possesses a long, strong, 
complete lateral carina. The frons is thickly rugose of varying 
degrees of coarseness. The cheek is slightly roughened below 
the eye, obliquely wrinkled on the middle third, and rugose 
below. The clypeus and the lorse are more or less rugosely 
roughened. The size is variable within narrow limits in all of 
the species. 
Key to the species of Krisna. 
a 1 . Lower margin of transversely wrinkled ocellar area with several strong, 
irregular, noncontinuous wrinkles of similar size, and with wrinkles 
on supra-antennal area; frons below ocellar area not or only moder- 
ately depressed; smaller species of slenderer form. 
b 1 . Frons evenly convex from margin of vertex to clypeus; length of 
male, 8.5 millimeters K. minima sp. nov. 
b 2 . Frons distinctly depressed below ocellar area; size usually larger, 
ck Vertex with but one irregular submarginal carina, distinct at least 
at sides, the entire disk uniformly coarsely rugose. 
d 1 . Supra-antennal carina passing on to frons in an even curve, or 
for a short distance straight and then curved; tegmina trans- 
lucent, the puncturation rather fine. 
e\ Lateral carina of pronotum about same length as eye in lateral 
view. 
f. Supernumerary veins numerous ; wings milky subhyaline ; face 
concolorous with remainder of undersurface. 
K. strigicollis Spin. 
f 2 . Supernumerary veins few; wings dark smoky. 
g 1 . Supra-antennal area as broad as long, face concolorous. 
K. simillima sp. nov. 
g 2 . Supra-antennal area longer than broad ; frons black. 
K. nigrifrons sp. nov. 
e 2 . Lateral carina of pronotum distinctly longer than eye in lateral 
view K. penangensis sp. nov. 
