Ma. Zumbado et Fc. Thompson, NEW SPECIES OF STERPHUS (DIPTERA, SYRPHID AE) IN COSTA-RICA WITH NOTES ON OTHER SPECIES EXISTING IN COSTA-RICA, The Southwestern entomologist, 22(1), 1997, pp. 79-90
Sterphus rufoabdominalis and gamezi are described. A new key to the sp
ecies of Sterphus is given. Distribution notes are given for other Cos
ta Rican species.