78 
The Philippine Journal of Science 
1919 
Luzon, Los Banos {Baker) : Bataan, Lamao (P. J. Wester), 
at flowers of Nipa fruticans, February 26, 1916. 
I take the opportunity to make known some species obtained 
by Professor Baker in Penang and Singapore : 
Trigona ambusta sp. nov. 
Worker. — Length, 8.5 millimeters; anterior wing, 8 milli- 
meters. Head large, shining black, the clypeus ferruginous, 
broadly suffused with dusky above and at sides; antennse dark, 
except basal third of scape, which is bright ferruginous; man- 
dibles simple ; front with fine brown pruinose tomentum ; a band 
of stiff black hair behind ocelli; mesothorax and scutellum fer- 
ruginous, the latter with two dark marks and the mesothorax 
with dusky lines anteriorly; surface of mesothorax with very 
short thin rich fulvous tomentum, and anteriorly with black 
hairs; scutellum with short stiff black hairs; metathorax hairy 
at sides, but the broad central portion polished, shining black; 
pleura black in middle, reddish around sides, and red below; 
tegulee castaneous ; wings fuliginous, with the apical field broadly 
reddish hyaline; stigma and nervure dusky reddish; legs black, 
the coxae and trochanters red; abdomen black (extreme base of 
first segment red), narrow, compressed, shining, with dark hair 
at apex. 
Singapore {Baker 9067) . Allied to T. lacteifasciata Cameron, 
from Borneo, but with black femora, basal part of wings dark, 
and other differences. It is also related to T. thoracica Smith, 
differing in the color of the wings, which Smith describes as 
flavo-hyaline in his species. 
Trigona atripes Smith, a variety differing a little in the color 
of the legs, comes from Penang Island {Baker 9068). The 
following species with black head and thorax were obtained by 
Baker on Penang or at Singapore : 
Mesothorax dull, bordered with fulvous hair (Penang). 
fulvomarginata sp. nov. (9073). 
Mesothorax not thus bordered 1. 
1. Small species, with red scape 2. 
Larger species; scape black, at most red at extreme base 3. 
2. Tegulse ferruginous (Singapore) valdezi sp. nov. (9074). 
Tegulse black (Penang) penangensis sp. nov. (9075). 
3. Larger; transverse-cubital nervures barely indicated (Singapore). 
busara sp. nov. (9072). 
Smaller; transverse-cubital nervures distinct 4. 
4. Scutellum bare (Penang) bakeri sp. nov. (9069). 
Scutellum conspicuously hairy (Singapore). 
itama sp. nov. (9071=type; 9070). 
