Latrodectus

My pet spider is completely black
She has a red mark over her back
When she gives you a little nog
Her very simple little blog
Physical contractions felt within
As strong as you sin
Enough to take your mind
To make your body blind
She sees in the myre of her blog
Whether you have acted like a dog
Heed this very little mark
Your foe is not size but the dark

Muscipula