326 Mr. F. Smith’s Notes on 
above, and more or less yellow beneath; the abdomen brown, 
when distended with honey, showing the pale membrane that 
attaches the segments one to another, giving the appearance of 
being banded with pale fasciz ; the coxee and femora dark brown; 
the tibiae paler, with the tarsi honey-yellow ; the face is covered 
with a short downy grey pubescence; the mandibles, labrum, and 
the scape in front, yellow; the wings milky-white, the’ costal 
nervure brown; the tegulze yellow; the scutellum usually more 
or less pale. 
In the Monograph, already referred to, on the stingless honey- 
bees (Tr. Ent. Soc., 3rd series, i. 497), I have described males as 
well as workers of T'rigona ; but the female was previously un- 
known to me; neither do I recollect to have found that sex 
noticed by any author. M. Guérin discovered six or seven females 
of Melipona in a nest of M. fulvipes; but that sex of the genus 
Trigona is, I believe, for the first time noticed in this paper. 
Whether a colony of T’rigona at any period contains more than 
one gravid female cannot be decided; but the fact of finding a 
single one, and that one apparently the sole mother of the entire 
brood, leads me to entertain the opinion that the swarms are 
governed by a single queen, as in the case of the hive-bee. It is 
true that colonies of these bees are described as containing a 
countless host ; so are communities of Termites ; and in both cases 
we find a female with a very similarly enlarged abdomen. 
Another vial contained between five and six hundred of TZ'ri- 
gona ruficrus, all apparently workers. This bee is called “ Abelha 
Cachorro,” signifying the bee of. the dog. One circumstance is 
noticeable. The mature bee is entirely black; but among the 
multitude of specimens were found individuals of every shade of 
colour between pale testaceous and black. ‘This is analogous to 
what I have observed in our own social bees and wasps, in whose 
nests individuals will be found, exhibiting stages more or less 
approaching maturity. Wasps frequently emerge from their 
cocoons destitute of all markings on the abdominal segments; 
and banded species of our black humble-bees sometimes emerge 
clad in uniform silver-grey, a few days serving to bring out the 
perfect colouring of the insects. 
Another bottle contained a very large number of specimens of 
Trigona basalis, a species first described by myself in the Cata- 
logue of Bees published by the Trustees of the British Museum. 
Among them wasa single specimen of the male. This species is 
about 33 lines long. The worker has the head, thorax, legs, and 
