316 _ The Philippine Journal of Science 1921 
margin slightly curved; flagellum stout, subclavate, the first joint 
slightly longer than the second; pronotum carinate anteriorly, 
rounded laterally; mesoscutum shining, with sparse, poorly 
defined punctures which are smaller and denser anteriorly : 
parapsidal furrows weak, indicated for about half the length 
of the scutum; scutellum and metanotum with separate distinct 
punctures; mesopleura, metapleura, and sides of propodeum 
anteriorly, smooth, shining; episternauli poorly defined ; inclosed 
area of propodeum broadly triangular, with a few ruge, the 
median ones more prominent; posterior surface of propodeum 
transversely rugulose, the sides posteriorly finely reticulate; 
legs robust; longer calcarium of posterior tibia nearly as long as 
hind basitarsus; abdomen smooth, shining; petiole cylindrical, 
curved, about the same length as the hind femur; pygidial area 
defined by carinz, very long and narrow, the carine nearly 
parallel; first and third cubital cells each receiving a recurrent 
vein; second cubital cell narrower above because of the oblique 
first intercubitus; venation of hind wings normal. Black; man- 
dibles except apices, palpi, scape, flagellum beneath except apices, 
pronotum posteriorly, tubercles, tegule, two spots on scutum 
posteriorly, metanotum, four anterior legs below apical third 
of femora, posterior femora beneath apically, posterior tibize 
except a black median band and posterior basitarsi yellow; face 
and clypeus with silvery pubescence; vertex and thorax with 
sparse hair. Wings hyaline, iridescent; venation black. 
The paratypes indicate that the line on the metanotum may 
be interrupted. 
Type locality.—Los Bafios, Laguna, Luzon. Described from 
two females (one type) from Los Bafios, and from one female 
from Mount Banahao. All specimens received from C. F. 
Baker. 
Type.—Catalogue No. 22842, United States National Museum. 
Diodontus maurus sp. nov. 
This species is allied to Diodontus tuberculifrons Rohwer, 
but besides the characters given in the preceding key it may be 
distinguished from that species by the black hind legs. 
Male.—Length, 7 millimeters. Clypeus convex medially, the 
apical margin with two obtuse teeth, which are separated by 4 
U-shaped emargination ; clypeus and face with distinct, separate 
punctures; frontal carina weak dorsally, very prominent between 
bases of antennz to the transverse facial carina; transverse fa- 
cial carina nearly complete to eye margins where it joins a raised 
