i7, 2 Cockerell: Bees from, Sandakan, Borneo 225 
6 
third and following segments dull; sides of first segment with 
small fringes of white hair ( Baker 9985). 
Female . — Like the male, but face marks reduced to three; 
namely, a very broad band on clypeus (sometimes rounded, 
sometimes slightly emarginate, above), and lateral face marks; 
the latter keeping the cuneiform shape, but separated from the 
clypeal mark, and their lower ends scarcely going down as far 
as middle of clypeal band (Baker 9987). 
Borneo, Sandakan ; 1 male, 4 females. The male is extremely 
close to P. taclobana Cockerell, from Leyte; but the mesothorax 
is more coarsely sculptured, the wings are browner, and there 
is less yellow on the scape. I cannot separate the female from 
the Philippine P. opacissima, which has hitherto been known 
only in that sex. 
Prosopis borneensis sp. nov. 
Female. — Length, about 6 millimeters, robust; black, with 
yellow markings as follows: Large cuneiform mark on clypeus 
(the point upward), broad-triangular lateral face marks (fill- 
ing space between clypeus and eye, and ending on the orbits 
at an angle of about 45 degrees, a little above level of antenna), 
interrupted band on prothorax (not nearly reaching tubercles), 
tubercles, large spot on tegulse (which are piceous posteriorly), 
and all the tibia at base (the anterior and posterior ones broad- 
ly, the middle slightly). Tarsi black; mandibles with a sub- 
apical spot ; antenna black, flagellum ferruginous beneath 
apically. Face broad; front dull; mesothorax distinctly and 
very densely punctured, posterior middle more shining and not 
so closely punctured; scutellum shining, and with large punc- 
tures; base of metathorax with ruga forming an irregular 
reticulation ; sides of metathorax pruinose with fine pale pubes- 
cence; wings hyaline, slightly dusky, stigma and nervures black; 
first recurrent nervure meeting first transversocubital ; second 
submarginal cell broad; abdomen shining, hind margins of seg- 
ments laterally with fine pruinose pubescence. The apical 
ventral segment is sheathlike, inclosing the sting. 
Borneo, Sandakan. Belated to P. mindanensis Cockerell, 
from Mindanao. Only the male of mindanensis is known, but 
the Bornean insect has the wings distinctly brownish, and the 
scutellum and posterior part of mesothorax less densely punc- 
tured, so I think it is certainly distinct. The lateral face marks 
of mindanensis have the upward extension linear instead of 
broadly angular. 
