Bald-faced hornet Bald-faced hornet Dolichovespula maculata is a eusocial wasp of the cosmopolitan family Vespidae. Its colloquial names include the bald-faced hornet, bald hornet, white-faced hornet, white-tailed hornet, spruce wasp, blackjacket, and bull wasp. This species is a yellowjacket wasp, not a true hornet (genus "Vespa"). Colonies contain 400 to 700 workers, the largest recorded colony size in its genus, "Dolichovespula". It builds a characteristic large hanging paper nest up to 58 centimetres (23 in) in length. Workers aggressively defend their nest by repeatedly stinging invaders. "Dolichovespula maculata" is distributed throughout the United States and southern Canada, but is most common in
Robert Bald of the system of apprenticeship in the West Indies. The meeting attendees included the Lord Provost and other city dignitaries, as well as those connected with the Emancipation Society. Bald is reported as seconding the first resolution against the evils of apprenticeship, which was called for the abolition of a system that was but slavery under another name. In 1808 Bald mentored Francis Benjamin Hall, civil engineer and later acted as a mentor for the teenaged James Nasmyth, engineer and inventor of the steam hammer, introducing him to noted engineers and taking him on trips to engineering sites. Nasmyth mentions