A glossy head, slender legs, and four pronotal spines are among the traits of genus Repipta.
Shown here is a female of Repipta flavicans, a common and widespread species.
Photo location: Along the Rewa River, Guyana
Determined by Dr. Abdiel Martín-Park, Universidad Autónoma de Yucatán.
Another image of a Repipta species from Guyana is also pictured on this site.
American Insects site