Gotra marginata (Brulle, 1846) 緣斑脊額姬蜂
Muy parecido a X. virginica, pero la distribución no parece coincidir.
Ants at a mint; or, adament ants!
Green sweat bee (Agapostemon sp.) emergig from its burrow
No sé si sea la misma especie que mi observación anterior, porque estos son negros y los otros no.
The Hymenoptera are one of the largest orders of insects, comprising the sawflies, wasps, bees and ants. Over 150,000 species are recognized, with many more remaining to be described. The name refers to the wings of the insects, and is derived from the Ancient Greek ὑμήν (hymen): membrane and πτερόν (pteron): wing. The hind wings are connected to the fore wings by a series of hooks called hamuli.