Proboscis: Long, dark-scaled.
Palpi: short, dark
Head: Occiput with narrow curved ash-white to golden scales and brown erect forked dorsally, with broad dingy-white scales laterally.
Thorax: Integument of scutum usually light brown; scutum clothed with narrow light-brown scales, light gray to dark brown on some individuals, scales on anterior and lateral margins and the prescutellar space paler; a pair of indefinite submedian spots of pale scales often present near middle of scutum. Scutellum clothed with grayish scales and brown setae. Pleura with patches of broad white scales.
Abdomen: 1st tergite with median patch of dark scales; remaining tergites dark-brown to black-scaled with bronze to metallic blue-green reflection, each with a narrow apical band of white scales joining a triangular patch on either side. Venter clothed with grayish-white scales.
Legs: dark-scaled with bronze to metallic blue-green reflection except for small pale knee spots, pale posterior surface of femora and tibiae and a pale streak usually present on segment 1 of tarsi (pale posterior stripe on hind femur complete).
Wings: length 3.0 to 3.0 mm. narrow, dark scales.
Bionomics: Larvae found in semi-permanent and permanent pools in streams, swamps, and ponds. They do not favor foul water. Larvae can be collected Spring, Summer or Fall. Females prefer to feed on cold-blooded vertebrates, particularly frogs. Females overwinter as adults in hibernation in colder areas. Flight range is short, only up to 1/8 mile.