192 
Philippine Journal of Science 
1919 
long and slender, nearly as long as abdomen, reaching far caudacl 
of forceps, slender and acuminate; forceps a little longer than 
anal valve, situated near base of genital segment, somewhat 
triangular in lateral outline, broadest near base, shortly petiolate, 
converging to blunt point at apex, scarcely arched toward each 
other; anal valve small, not as long as forceps, with a fingerlike 
projection caudad below midpoint. Female genital segment 
about as long as abdomen, slender, acuminate; ventral valve 
about half as long as dorsal, latter long and slightly constricted 
midway. 
Singapore {Baker), 2 males and 2 females. 
This is a very striking species, remarkable for its genitalia 
and differing from most Triozse in wing characters. It should 
be perhaps referred to a distinct genus. In the next genus, 
Megatrioza, there is a marked tendency toward abortion of the 
hind wings. 
Genus MEGATRIOZA Crawford 
Head more or less declivous, usually not as broad as thorax; 
vertex broader than long; genal cones usually rather short but 
in a few species long, usually thick and bluntly rounded; frons 
concealed. Thorax broad or narrow, strongly arched or some- 
times nearly flat, usually sparsely clothed with long hairs; legs 
long, apparently strongly saltatory; metacoxse with large pos- 
terior spurs and also a pair of spiniform processes extending 
cephalad between bases of hind legs ; hind tibiae with a small or 
large spur at base, a more or less conspicuous, thick spine or 
tooth near apex and three smaller spines at extreme apex. Fore- 
wings hyaline, sometimes colored, usually acutely pointed, long 
and narrow, venation triozine with radius and clavus short. 
Hind wings usually much reduced, seldom more than half as long 
as forewings and sometimes very greatly reduced. Abdomen 
short or long; male anal valve broad, with lateral wings pro- 
duced caudad. 
Type of the genus, Megatrioza armata Crawford (’15: 264). 
This genus was first erected for a single large and striking 
species of the Philippines. The subsequent study, however, of 
additional South Pacific psyllids makes it appear that this genus 
has very many representatives throughout tropical Asia and 
the South Pacific Islands, and no doubt in other tropical areas 
as well. 
The most striking characteristics of this generic group are the 
armed hind tibise, unusual in Triozinse ; the secondary metacoxal 
