204 



Head and mesoscutiim smooth and not reticulate, the basal tergite 

 distinctly reticulate. 



Length : .71 to .86 mm. 



Coloration as in the female, not reddish as in aftcnis. the abdomen 

 black. 



Descril)e(l from 3 females, 3 males (type, allotype and 

 paratypes) collected on Laysan Island, December, 1912 TFiilla- 

 way). 



Xanthoencyrtus semiflavus n. sp. 



Female : Similar to X. aptcrus and differing as follows : Head a 

 little wider, being considerably wider than the thorax and in frontal view 

 distinctly wider than long; the space between the eyes from the antennal 

 sockets to the occipital margin a little wider than long, with a trans- 

 versely oval depression on the lower part somewhat above the antennae, 

 the vertex fully as wide as the pronotum ; ocelli rather more minute, 

 the posterior pair distinctly more remote from the eye-margins than 

 their distance apart. Antennae more nearly as in laysaucnsis in thick- 

 ness or width; the scape considerably wider than in a[>tcrus: the pedicel 

 not so distinctly wider at apex than the following joint; the fiagellum 

 stouter but increasing in thickness distad in about the same proportion, 

 the first funicle joint relatively longer, the apical funicle joint slightly 

 wider, the last two being as wide as long ; the club as in apterus 

 Thorax and abdomen about as in aptcnis, the scutellum rather more 

 acute at apex, the ovipositor slightly protruded. Sculpture smooth, witli 

 no reticulations apparent on the mesoscutum. 



Length : 1.38 mm. 



Coloration similar to aptcrus except that the abdomen is not yellowish 

 at base although somewhat brownish, the funicle yellow instead of black, 

 with the last joint somewhat dusky and the club black, the tarsi yellowish 

 white and distinctly paler than the rest of the legs. 



Male : Unknown. 



Described from 1 female (type) collected on the southern 

 slopes of Diamond Head, Oahn, in the spring- of 1917 (Fulla- 

 way). 



Xanthoencyrtus fullawayi n. sp. 



Female : Head very thin fronto-occipitally, seen from in front nearly 

 circular, the entire anterior or dorsal aspect lying in one plane ; the 

 occiput strongly concave above with the neck inserted far above the 

 center; space between the eyes from the antennal sockets to the occipi- 

 tal margin about a fifth longer than wide, and very slightly convex from 



