Antennae reaching the hind angles of the prothorax; second and third segments subequal, the two together of the same length as the fourth.

Luminous spots lateral, slightly convex and also visible beneath in the proepisternum.

Female genitalia: bursa copulatrix spiraled and with long spines; median oviduct with two pair of sclerotized plates.

[1] Deilelater, another genus of the tribe Pyrophorini occurring in Southeastern United States, Mexico, etc., is distinguished from Vesperelater in male genitalia with well-developed median lobe with numerous cuticular, minute scales.

[4] Species of this genus occurs in the United States (Arizona) and Central America, from Mexico to Costa Rica.