Bas 
January, 1917 (Giffard and Muir), with length of body, 1.22 
nim. and marginal vein about 2.9 times longer than the stigmal. 
One female collected at an old steam crack, four thousand 
feet, Kilauea, Hawaii, September 8, 1919 (W. M. Giffard), 
body 1.11 mm. long and marginal vein slightly less than three 
times longer than the stigmal. 
One female dissected from a Dryinid cocoon, probably of 
Pseudogonatopus perkinsi, which in turn was reared from para- 
sitized nymphs of Jlburmia coprosmicola Muir, collected on 
Coprosma ernodioides at twenty-seven miles, near Kilauea, 
Hawaii, July 30, 1918 (W. M. Giffard), has the body 1.19 mm. 
long and the marginal vein only slightly longer than the stig- 
mal, the apex of scutellum, sides of propodeum and base of 
abdomen with a brilliant purple luster. | 
This series of Hypergonatopus from the Kilauea region, 
Hawaii, shows a remarkable degree of variation in the propor- 
tions of the marginal and stigmal veins, but as I cannot dis- 
cover any other tangible differences between the extremes, it 
seems reasonable to suppose that they all belong to one species. 
The holotype shows an intermediate condition. 
Hypergonatopus oahuensis n. sp. 
Female. Very similar to vulcanus and differing in the same way that 
it does from hawaiiensis, but the facial prominence between the aytennae 
extends the whole length of the scrobal impression, the head is thicker 
fronto-occipitally, the scutellum more uniformly conyex, with the declivity 
at apex distinctly more gradual. Sculpture similar, but the reticulation 
of the scutellum is coarser and distinctly enlarging towards the sides, 
a condition which holds in a lesser degree for vulcanus; pubescence con- 
siderably sparser on the seutellum, the sides of which are entirely bare, 
and the median longitudinal rows of setae are made up of only about 
five or six bristles. 
Similar to vulcanus in coloration, or bluish black with a green luster 
on frontovertex, mesoscutum, apex of scutellum and on the basal tergite of 
abdomen in some aspects; other parts of the body with a bluish luster 
which is weak except on the abdomen; antennae black and becoming 
slightly brownish on the flagellum; legs black, with front and hind tarsi 
brownish, the apex of middle tibiae and the middle tarsi brownish yellow. 
Wings very similar to vuleanus, but the marginal vein is 3.5 times 
longer than the stigmal, the latter enlarged towards apex and curved 
towards the costal margin. 
Length of body, 1.18; length of head, 0.398; width of head, 0.426; 
