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~Pubescence of head unusually sparse, the eyes being perfectly glabrous, 
but the frontovertex has an orbital row on each side of a few fine setae 
‘set in minute pin-punctures, and there is a row of very fine setae on each 
side of the face at the outer margin of the scrobal impression, each row 
encircling the antennal sockets and ascending on each side of the facial 
prominence to about opposite the upper end of the sockets; mesonotum 
including seutellum with more or less numerous reclinate setae of normal 
structure, which are scarcely seriately arranged; abdomen with a row of 
fine setae on each side of the basal tergite and rather sparsely pubescent 
on the sides towards the apex; legs and antennae with the usual amount 
of pubescence; pubescence of the body dark-colored throughout, and not 
conspicuous. ’ 
Coloration of body usually bluish-black, with more or less purple 
luster on the head and abdomen; the mesoseutum and often the fronto- 
vertex, metallic green; wings typically more or less deeply infuscated 
at extreme base and on the apical two-thirds, but the cloud becomes 
gradually fainter towards the apex, and is interrupted by a hyaline area 
at the end of the stigmal vein and by another area on the opposite 
margin of the dise. 
Male. Differs from the female mostly in the structure of the head 
and antennae. The head is much thinner fronto-occipitally, the eyes con- 
siderably smaller, the frontovertex much broader or hardly longer than 
wide; the face with a similar serobal impression which reaches upward 
‘between the eyes. Antennae inserted just below a line connecting the 
lower corners of the eyes; the scape rather short but reaching beyond 
the scrobal impression; pedicel not over twice as long as thick at apex 
and much shorter than the first funicle joint; flagellum slender and 
cylindrical, clothed with long, scattered, semi-erect setae; the funicle joints 
all much longer than thick, the club elongate and about equal to the last 
two funicle joints combined. Sculpture, pubescence and coloration of 
the same type as in the female, but the wing pattern is much fainter, 
although usually apparent. 
Genotype: Echthrogonatopus hawatiensis Perkins. 
This genus is closely allied to Echthrogonatopus Perkins, 
which in turn is similar to Epiencyrtus Ashmead, but Echthro- 
gonatopus as represented by its genotype, E. evitiosus Perkins, 
has no foveae on the vertex, the eyes are slightly pubescent, 
the mandibles with the teeth nearly equal, the scutellum densely 
and opaquely sculptured, the mesoscutum with appressed, rather 
dense whitish pubescence, the middle tibiae less enlarged at 
apex, and the middle tarsi less thickened at base, the wings 
wholly hyaline, the dise ciliated throughout, the basal area 
being but little more sparsely pubescent, the speculum narrow 
and reaching from the stigmal vein obliquely nearly to the 
