276 
Philippine Journal of Science 
1919 
punctate; area of metathorax rather large, dull, microscopically 
rugose, with a slight tendency to plication basally ; tegulse testa- 
ceous, with a yellow spot; wings hyaline, with pale ferruginous 
stigma and nervures; first recurrent nervure joining second 
submarginal cell some distance before its end; third submar- 
ginal cell much broader in middle than second; outer recurrent 
and transverse cubital weakened; posterior face of metathorax 
densely covered with hair; legs with pale ocherous hair; hind 
spur with four long slender spines and a fifth rounded rudi- 
ment; abdomen broad, moderately shining, with a sericeous 
surface; basal part of first segment with dense pale ocherous 
hair, and segments 2 to 4 with dense basal bands; ventral seg- 
ments polished and shining basally. 
Male. — Length, about 6.5 millimeters; clypeus with a broad 
yellow apical band; labrum yellow; mandibles broadly yellow 
in middle, but with a black spot at base; scape yellow in front; 
flagellum rather long; dark areas on tibia smaller, and hind 
baSitarsi all yellow; hind margins of abdominal segments very 
narrowly fulvous; apical plate very broad and rounded; third 
ventral segment with a dense stiff brush of whitish hair along 
the margin, not reaching the sides. 
Luzon, Laguna Province, Los Banos {Baker), type locality; 
Mount Maquiling {Baker) ; Pagsanhan {Baker), the male de- 
scribed and 2 females: Manila {Eschscholtz) , type of H. manilee 
Strand. Mindanao, Cagayan {Baker) ; Bapitan {Baker) . 
A male from Mount Maquiling is Baker 2560. A very dis- 
tinct species, on account of the color of the legs resembling 
H. roepkei Friese, from Java. 
Halictus opistlioclilorus sp. nov. 
Female. — Length, nearly 7 millimeters; anterior wing, 4.75 
millimeters; black, with the upper part of the metathorax dark 
blue-green ; pubescence scanty, face with inconspicuous dark 
fuscous hairs, mesothorax almost bare, sides of thorax with 
thin white hair, abdomen without hair bands or patches, but 
with a scopa of long, white, curled hairs on ventral surface; 
head broad and short; antennae black, scape reaching to level 
of ocelli; face and front dullish with a sericeous luster; meso- 
thorax and scutellum dullish, with a sericeous luster and with- 
out evident punctures ; area of metathorax with very fine striae, 
appearing granular under a lens; posterior truncation not 
sharply defined; tegulse brownish black; wings dusky hyaline, 
strongly iridescent; stigma and nervures piceous; second and 
