This insect is extremely cool and extremely rare. It was known only from its male for many years, and they in turn were very infrequently encountered at black light, the only source of collection for them. This is probably due to their early spring flight period, but still, only a relatively few specimens have been seen by me in a broad cross-section of private and institutional collections. Over the past 10-15 years, males have ostensibly disappeared from known localities, which I attribute to the drought, as well as other major ecologically devastating affects, that clearly decimated nocturnal insect activity in their prime localities, such as Molino Basin and Reddington Pass. Only one female specimen was known, observed and collected by me in 1981, along a gentle tributary of the Babocomari River, a locality now destroyed by cattle. She didn't attract a male, but the design of her pronotum, with the orange patch and the flanged margins, as well as her simple antennae, associated her with the only male in the known fauna with similar facies- P. pulsator. His picture can be seen in Cicero (2006) Pan Pac. 82(2):200-207. Now, all of the sudden, three females show up with lights on in the well-watered backyard garden of two excellent, very observant naturalists in Sierra Vista, so there's hope for a comeback to the species after all. Problem is that the task of species dispersal is relegated to the larvae, which can't travel far per year. They'll never get across Hwy 90/92.
She pulses her light in a steady, gentle, sinusoidal pattern. In the picture of one of them, taken and posted by Charles, she has retracted from a genuflected "C"-shaped posture characteristic of advertising female fireflies, probably because of the camera flash. The genuflecting brings the ventral lights into view of the males, flying in the night sky searching for them.

Larviform female fireflies are neotenic...they quit their metamorphic program earlier than the male does, and consequently emerge as adults that are more larval than he, and in fact, more larval than the broader coleoptera. Notice her short elytra, they indicate that she quit at about the first third of the program, when the wings had only grown that long during the pharate pupal stage. The head, pronotum, and legs, however, reached maturity, indicating that they are first in the program. The endocrine system controls the program, and it incites metamorphosis in characters in an anterior to posterior order. This developmental system can be seen in my tutorial at mycantharoidea.arizona.edu

now we have all the lampyrid genera in the guide

Moved from ID Request.