24 
PACIFIC SCIENCE, Vol. Ill, January, 1949 
Supra-alar: 9 long, simple. 
Metanotum: 10 two- or three-forked, occasion- 
ally simple or four- to five-forked; 11 simple; 
12 simple. 
Trumpet: short, funnel-shaped, greatest diam- 
eter equal to a little less than half the length; 
pigmentation uniform; pinna equal to about 
two-fifths of total length; no definite tracheoid 
portion present. 
Abdomen. — Segment I: h small, simple; K 
long, simple; L medium, usually two-forked 
from near base, occasionally three- or four- 
forked; M very small, usually simple, ranges 
from simple to four-forked; S and T long, sub- 
equal to each other, simple; U minute, simple. 
Fig. 12. Tripteroides argenteiventris: dorsal aspect 
of right half of abdomen of female from Hilimoi, 
Papua. 
Segment II: A small, simple spine; B long, sim- 
ple; c small, three- to seven-forked near base; 
c' small, simple; 1 medium, simple or two- 
forked; 2 longest seta on segment, simple; 3 
small, two- to five- forked; 4 medium, usually 
simple, occasionally two- or three-forked. 
Segment III: A small, simple spine; B long, 
simple; C small, usually three-forked near base, 
occasionally simple or four- to five-forked;- d 
small, simple; 1 small, simple; 2 small, two- or 
three-forked, rarely simple; 3 represented only 
by its socket; 4 medium, simple. 
Segment IV: A small, simple spine; B very long, 
exceeding posterior margin of segment V, sim- 
ple; c small, two- to three- forked near base, or 
occasionally four-forked; d small, simple; 1 
small, simple; 2 medium, simple; 3 represented 
only by its' socket; 4 medium, usually two- 
forked from near base, occasionally simple or 
three-forked. 
Segment V: A small, simple spine; B very long, 
equal to B-IV, simple; C small, usually two- 
forked near base, or occasionally simple or 
three-forked; c' small, simple; 1 small, simple; 
2 medium, usually two-forked near base, occa- 
sionally three-branched; 3 represented by its 
socket; 4 medium, simple. 
Segment VI: A small, simple spine; B long, not 
quite reaching posterior margin of segment VII, 
simple; C small, usually simple, occasionally 
two- to three-forked from middle; d small, 
simple; 1 medium, well removed from the lat- 
eral margin, simple; 2 medium, simple; 3 ab- 
sent; 4 medium, simple. 
Segment VII: A large, black, conspicuous nine- 
to fourteen -branched, plumose tuft, usually 
twelve-branched, about equal to B-VI in length; 
B small, simple; c small, either simple or two- 
forked; d small, simple; 1 small, simple or two- 
to three-forked near apex; 2 medium, simple; 
4 medium, simple. 
Segment VIII: A very large, black, conspicuous 
thirteen- to twenty-two-branched, plumose tuft, 
averages seventeen-branched, exceeding the pad- 
dles in length; a' long, reaching to about the 
middle of the paddle, simple. 
