274 
PACIFIC SCIENCE, VoL V, July, 1951 
revision he will undoubtedly erect a new 
genus for this group of species. 
Arytaina extrema n, sp. 
Fig. 1 
Length to tip of folded wings, 3.0- 
3.25 mm. 
Color: Dried specimens uniformly brown. 
When alive probably green, at least abdomen. 
Structure: Short pubescence general on 
body. Head broader than thorax, strongly de- 
flexed. Vertex flat, strongly narrowed an- 
teriorly, blunt protuberance next each eye. 
Genal processes much below plane of vertex, 
broad, blunt, one-third as long as vertex, with 
ring of large stiff setae. Antennae slender, 
three times as long as width of head. Thorax 
broad, quite flat. Pronotum large, vertical 
anteriorly. Forewings broad, slightly over 
twice as long as wide, broadly rounded 
apically; venation typical, Cui very strongly 
arched; pterostigma large, prominent. Legs 
stout. Metatibiae with large, curved basal 
spine and 5 black apical spines, 2 single and 
a cluster of 3. 
Male genital segment large, with short 
pubescence. Proctiger in lateral view slender, 
produced caudad apically. Forceps about as 
long as proctiger, slender basally, enlarged 
apically and produced both caudad and 
cephalad as figured, inner surface beset with 
numerous short heavy setae. Female genital 
segment large, slender; dorsal valve elongate, 
sinuate, abruptly turned up at apex, with area 
of minute spines laterally in addition to 
usual setae; ventral valve long, upturned, 
acute. 
Holotype male, allotype female, and 26 
paratypes collected at several localities (Ma- 
tansha-Calabera, Garapan, Garapan-Sadog 
Tasi, Tapocho, Fanagam) on Saipan, Mari- 
anna Islands, May 2-6, 1940, Yasu. et Yoshi. 
Type in author’s collection. 
This species is very evidently related to A. 
clara (Tuthill) but is readily distinguished by 
the shorter genal processes, which are much 
more depressed below the plane of the vertex, 
Fig. 1. Arytaina extrema n. sp. a, forewing; b, lateral 
aspect of male cauda and inner face of clasper; c, lateral 
aspect of female cauda. 
the shorter antennae, and details of the geni- 
talia, especially those of the male. 
Trioza (Megatrioza) vitiensis Kirkaldy 
Caroline Islands: Kolonia-Jokaji, Ponape, 
January 9, 1938; Matalanim, Ponape, Janu- 
ary 11, 1938; Matalanim-Nipit, January 12, 
1938; Kolonia-Paliker, July 16, 1939. 
Esaki notes this widespread species as com- 
mon on Ponape, where it forms very con- 
