453 



on each side of median suture, posterior ocelli slightly elevated, anterior 

 half bulging and clothed with moderately long hairs. Genal cones short, 

 seldom more than ^ or 1-3 as long as vertex, subacute, divergent, 

 somewhat separated. Eyes very large. Antennae slender, not quite twice 

 as long as width of head. 



Thorax large, broad, well arched, surface l)rielly and sparsely pubes- 

 cent; legs rather long, stout, pubescent; hind tibiae with a spur at ])ase 

 and two prominent teeth at apex, one bitid and one simple and a tliird 

 long tooth a little before the apex. Forewings large, long, hyaline (»r 

 very slightly smoky, with four dark spots on hind margin, one at tip 

 of clavus and the other three the regular marginal spots characteristic 

 of this subfamily but darker and more prominent. 



Abdomen long in lioth sexes ; male forceps nearly as long as anal 

 valve, slender, narrowing slightly toward subacute apex, hairy. Anal 

 valve much broader than forceps, posterior margin convex, broadest 

 near base and narrowing distad to truncate apex. Female genital seg- 

 ment large, not as long as abdomen but often nearly so, both valves 

 acutely pointed, dorsal longer than ventral. 



Distribution: — Island of Oalni — Pnnaliin ( (). 11. Swezey) ; 

 Wailiipe, riannarv 23, 1915 (Swezey) ; Alt. Olympns, eleva- 

 tion 2500 ft., September, lOlT (Swezey and Crawford) ; W;ii- 

 ahole, Ano-nst 23, 1010. 



P'ood })lant : Fan palm (Pr'dchardia spp.)i native palms. 

 This species ap])cars to oeenr only on the endemic palms 

 which are comparatively rare on Oalm. The insects live on 

 the yonnger fronds, especially those jnst nnfolding-, from which 

 they can readily snck the sap and in the folds of which they 

 find good refnge and seclnsion. 



Megatiioza is a Polynesian genns, distingnished by the 

 armature of the hind tibiae together with certain cephalic and 

 wing characters. Tims far there are ten known species of this 

 genns^ in the ^Malay Archipelago and Peninsula and the Phil- 

 ippines, though there are doubtless many more to l)e discovered, 

 as this a]i]iears to be a large genus. None of these known ten 

 species shows any marked relarionshi]) to the Iltnvaiian species, 

 so that it is probable that the latter is derived from some other 

 still unknown species. It is possible that it may occur else- 

 where, being merely an introduction here, but the indications 



1 These species are described in a forthcoming paper on paleotro])ical 

 Psyllidae by the author of this paper. 



