12 
Philippine Journal of Science 
1919 
Male. — Antennae very long, black; face green; abdomen slen- 
der, black; tarsi, and anterior tibiae in front, ferruginous. A 
male from Mount Banahao is considerably larger than one from 
Mount Maquiling. 
Luzon, Mount Maquiling (Baker), type and varieties a and 
b; Imugan (Baker), variety c; Mount Banahao (Baker), male. 
Very variable, but apparently all one species. I have nine 
specimens before me. 
Halictus imuganensis sp. nov. 
Female. — Length, about 7 millimeters; bright golden green, 
the clypeus, mesothorax, and scutellum variably suffused with 
coppery red, or entirely green, or the clypeus peacock green; 
mandibles obscure reddish; face, front, mesothorax, and scu- 
tellum with a roughened granular surface ; antennae black ; area 
of mefathorax shining, with strong, irregular plicae, forming a 
coarse irregular network; posterior truncation sharply defined 
at sides; thorax above with thin ocherous hair; tegulae rufo- 
piceous ; wings very faintly dusky ; stigma black ; second submar- 
ginal cell large and broad, receiving first recurrent nervure at 
its apical corner; outer transverse cubital and recurrent ner- 
vures weakened; legs black; abdomen shining, without bands; 
a well-developed ventral scopa. 
Luzon, Imugan (Baker) , type locality. Mount Banahao 
(Baker) : Baguio, Benguet (Baker). Five specimens are be- 
fore me. Allied to H. taclobanensis. 
Halictus adonidise sp. nov. 
Female. — Length, about 6.5 millimeters; shining green, with 
dark tarsi, tegulae rufotestaceous, and basal half of scape red. 
Closely allied to H. imuganensis Cockerell, differing in the color 
of scape, the bluish green (not brassy green) abdomen, the 
broader head, the scutellum and posterior half of mesothorax 
brilliantly shining, and the paler (brownish) stigma. 
Luzon, Manila, Malate (R. C. McGregor) , October 27, 1918, 
at flowers of Adonidia merrillii Beccari. 
Halictus cyanescens sp. nov. 
Male. — Length, a little over 5 millimeters; head, thorax, and 
abdomen blue-green; face and front, including clypeus, dull and 
granular; antennse black; mesothorax granular; area of meta- 
thorax irregularly reticulate; posterior truncation sharply de- 
fined at sides; tegulse testaceous; wings very faintly dusky, 
