From: ASSESSMENT OF SPECIES DIVERSITY IN THE MONTANE CORDILLERA ECOZONE
Robber Flies (Insecta: Diptera: Asilidae) Chapter

Ponderosa Pine woods, such as this one near Princeton, are home to a wide range of robber flies, including Leptogaster arida, Cophura brevicornis, Cyrtopogon montanus, Eudioctria sackeni, Stenopogon inquinatus, and a number of Laphria species. Photo: Syd Cannings.