156 
ture appearing smooth under low magnification, and with a row of 
sparse, minute, setiferous punctures at the orbits; mesoscutum polished 
and with very fine, scale-like reticulations, the axillae and «seutellum 
slightly duller with similar reticulations, those of the scutellum somewhat 
coarser; mesonotum also with a few, extremely minute, scattered setif- 
erous pin-punctures, those of the scutellum slightly larger and rather 
more numerous, and distributed sparsely over the disc from base to apex; 
1esopleura microscopically rugulose anteriorly, but becoming smooth on 
the posterior half, prepectal plates finely reticulate; propodeum smooth 
and polished, and with a median carina; abdomen smooth and _ highly 
polished. 
Pubescence of the head about as in hawatiensis; collar of pronotum 
with a row of fine setae somewhat coarser than those of the head, mesos- 
eutum with sparse scattered setae like those of pronotum, the scutellum 
with slightly coarser, more numerous setae; sides and apex of abdomen 
with a few fine setae, the basal tergite with a row of about six fine 
setae on each side near the middle. 
Head blue-black with a purple luster; mesoseutum bright metallic 
green, the axillae and scutellum duller green; pronotum, pleura and _ pro- 
podeum with a strong purple luster; basal tergite of abdomen bright 
metallic green, the remainder of abdomen brilliant metallic purple; an- 
tennae and legs entirely yellow, the coxae and base of femora paler, the 
general color approximating yellow ocher of Ridgway; apical fourth of 
wing beneath marginal vein and small area at extreme base fuscous, the 
marginal and stigmal veins dark brown, but submarginal except basal 
part nearly hyaline; pubescence of body dark and inconspicuous. 
Length of body, 1.18; length of head, 0.476; width of head, 0.490; 
thickness of head, 0.332; least width of frontovertex, 0.073; width of 
mesoscutum, 0.424; length of forewing, 0.552; width of forewing, 
0.216 mm. 
Male. Differs from the female principally in the shape of the head, 
which is much thinner fronto-occipitally with the face distinctly inflexed ; 
as seen from above the outline of the head is semicircular; as seen from 
in front the cheeks arcuately converge more strongly than in the female; 
as seen from the side the dorsal part is well rounded, but the face from 
the lower third of the eyes to just above the clypeal margin is strongly 
flattened and forms an obtuse angle with the plane of frontovertex; eyes 
hardly more than one-half as large as in the female, broadly oval and 
widest near the middle; frontovertex with parallel sides and about @ 
half longer again than wide; ocelli large, arranged in a nearly equilateral 
triangle, the posterior pair only slightly farther apart than the distance 
from either one to the anterior ocellus, about one-half their diameter 
from the eye-margin and about one and one-half times their diameter 
from the occipital margin; cheeks longer than wide and slightly longer 
than the width of the eyes; face comparatively larger than in the female, 
the upper part surrounding the antennal sockets distinctly flattened and 
also continuous with the scrobal impression, which is semicircular and 
