The Laphriinae family is dominated in the east by the Laphria genus. But the family includes eleven genera in the US overall. Two of which are essentially purely western. Two of the tribes have single species in the genera Orthogonis and Dasylechia. Both of these species are extraordinarily rare. And Dasylechia has not been seen since the late 1800s from the literature.

Laphria is the largest genus of robbers in Arkansas and one of the largest in the east. There are likely seventeen to twenty species in my state (over 10% of the robber fauna) and over sixty species in North America. This dwarfs most other genera in the east.

After the past few years of chasing robbers it is clear that the Laphria are a spring dominant species group. They appear before most of the other genera here in this family. And are unusual after spring with a few exceptions. Most are forest or understory loving robbers. Open woods with large-leaved, secondary growth beneath them are fine places to look for Laphria. They, along with Orthogonis and Pogonosoma, prefer areas with downed or deadfall wood which is where most if not all of the females deposit their eggs. Males can guard logs in all three of these genera. Dense, flat expanses of poison ivy often carry a few Laphria in spring. We are still trying to sort all the Laphria out and frankly Norm Lavers has been far more successful in the northeast part of the state at finding these than I have. And he remains the only one on the planet to net a male Orthogonis stygia and observe them.

Despite the size of some species Laphria tend to favor small to minute prey sometimes. They range from the giant Laphria lata at 35 to 40 mm to the small Laphria canis group.

Pages will expand as we explore these more. A working key to the Laphria of Arkansas appears here. Steve Bullington's new site location for Laphria sensu strictu with quite a bit of information and his own keys is here.