Oecanthus laricis This is a pair of Tamarack tree crickets. The male is singing, which exposes his metanotal gland. He is singing to entice the female to sip secretions from his metanotal gland. This species has a small range – southern Michigan and northeastern Ohio on Tamarack or Hemlock trees. They are very difficult to tell apart from Pine tree crickets. Although knowing the host tree is helpful, Pine tree crickets have also been found on Tamaracks and Hemlocks. Generally they have a truer brown color vs rust, an aging individual can have some fading of the brown. This female has a rich dark brown coloring. This Tamarack tree cricket is carefully cleaning her antennae. The technique is very similar to that of cats. To read the original description: https://orthsoc.org/sina/s576lw63.pdf