18, 3 . Rohwer: New Philippine Wasps 319 
half the length of the second intercubitus from its base. Black; 
mandibles, scape, flagellum beneath, tegule, tubercles, and legs 
beyond coxz testaceous; gaster reddish; head and thorax with 
long silvery hair which is especially dense on the propodeum; 
wings hyaline, iridescent; venation testaceous. 
Type locality—Basilan. One female from C. F. Baker. 
Type.—Catalogue No. 22845, United States National Museum. 
e. Abdomen reddish, thorax black with yellow markings. 
Diodontus luteopictus sp. nov. 
Of the described oriental species this species seems to be 
more closely allied to Psen pulcherrimus Bingham, but the color, 
sculpture, and venation are decidedly different from that species. 
Female.—Length, 9.5 millimeters. Clypeus very slightly con- 
vex, shining, sparsely punctured, the apical margjp rounded; 
face more closely punctured than the clypeus; a strong median 
carina, between the bases of the antennz, ends well above the 
middle of the face, as a short transverse carina, and extends 
dorsally to the anterior ocellus; frons, vertex, and posterior 
orbits smooth and shining; intraocellar area raised; ocelli in an 
equilateral triangle, the anterior oceilus the largest; postocellar 
line subequal to the ocellocular line; scape short, straight; flagel- 
lum subclavate, first joint one-fourth longer than second, the 
second and third subequal; pronotum carinate anteriorly, 
rounded laterally; scutum with sparse, poorly defined punctures ; 
parapsidal furrows weak, indicated on the anterior fourth; 
scutellum, metanotum, mesosternum, mesopleura, metapleura, 
and sides of propodeum anteriorly smooth, shining, impunctate; 
inclosed area of the propodeum broadly triangular, prolonged 
as a sulcus to the apex of the segment, the basal portion with a 
few prominent ruge; posterior surface and sides of propodeum 
posteriorly transversely rugulose; abdomen smooth, shining; 
postpetiole not sharply defined; petiole cylindrical, slightly 
longer than the posterior legs to apices of femora; pygidial area 
not defined; first and third cubital cells each receiving a recur- 
rent vein; second cubital cell nearly quadrate; third intercubitus 
strongly curved; venation of the hind wings normal. Black; 
mandibles except apices, palpi, scape, pedicellum, flagellum 
beneath, pronotum posteriorly, tubercles, tegulz, a line above, 
two spots below, two spots on scutum (broader behind), scutel- 
lum, postcutellum, spot beneath each posterior wing, posterior 
surface of propodeum except a median line, legs except the 
posterior femora above and-beneath, and the posterior tarsi 
