126 Psyche [August 
Berlin Museum, and was determined by Strand. Specimens from 
5. Paulo, determined as postica by Friese, are another species, 
having the tubercles tipped with yellow, and the abdomen beyond 
second segment covered with fulvous hair. 
Trigona nitidula sp. nov. (frontalis subsp.?) 
Male: Length about 4 mm.; closely resembling T. frontalis 
Friese, but the wings are quite clear (not greyish), and the nervures 
and stigma are dull testaceous; the abdomen is entirely dark. 
Eyes red; orbits converging below; clypeus, labrum, supraclypeal 
area and lateral face-marks yellow; mandibles yellow; scape yel- 
low in front. Thorax shining black, with narrow lateral margins 
of mesothorax, axilla and hind margin of scutellum cream-color. 
Tucuman, Argentine, December 26, 1912 (A. H. Rosenfeld and 
T. C. Barber). U.S. Nat. Museum. The types of T. frontalis 
came from Honduras, whence are also specimens in the U.S. Na- 
tional Museum, received from Friese. A related but larger species 
is T. remota Holmbg., which I have from S. Paulo, Brazil. Also 
of this group is T. molesta Puls, of which I have seen specimens 
from S. Paulo and Blumenau, determined by Friese. 
Trigona opaca sp. nov. (lineata subsp.?) 
Male: Length about 5 mm.; black, the front, long mesothorax 
and large scutellum dull; band on prothorax (interrupted in 
middle), lateral margins of mesothorax, continuing on axille and 
round margin of scutellum, as well as a large mark on tubercles, 
from which a line proceeds anteriorly, all clear yellow; clypeus 
(except two light brownish bars on disc), mandibles, supraclypeal 
mark (separated by a line from clypeus) and narrow bands along 
inner orbits to not far from top, all pale yellow; labrum dark brown, 
with a pale dot at each side; malar space small; eyes red; scape 
yellow in front; flagellum black, obscure red beneath; anterior and 
middle tibia light yellow on outer side, hind tibize with a broad 
light yellow band behind; tarsi rufofuscous; tegule rufofuscous, 
with a minute pale dot; wings greyish, with a pale yellow spot at 
base, just behind tegule, stigma and stronger nervures piceous; 
abdomen dullish, without markings, whole insect almost hairless, 
looking like a Prosopis. 
Tabernilla, Canal Zone, Panama, July, 1907 (A. Busck). Very 
