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[Major]

1. Location (on a map) of collection: Rochester, New York
2. Date of collection: July 14, 2018
3. Habitat of collection: Forest floor
4. Length (from head to gaster): 3-4 mm (workers, Queen not seen yet)
5. Color, hue, pattern and texture: Black
6. Distinguishing characteristics: N/A
7. Distinguishing behavior: like to hide
8. Nest description: Walnut
9. Nuptial flight time and date: N/A

Found these ants in a nut. There is brood with them so this is their nest. About 100 workers.

[AntsMaryland]

I would guess a species of Temnothorax. 

[Zxirl]

Do you have a side view? Is the waist segmented?