192 Philippine Journal of Science i»w 



long and slender, nearly as long as abdomen, reaching far caudad 

 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 Triozee 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 tibiae, unusual in Triozinse ; the secondary metacoxal 



