Two new subgenera of bees in the genus Centris (Hymenoptera: Apidae)Published in Scientific Papers Natural History Museum the University of Kansas, in 2002, in volume 25, pages 1-8The bee genus Chilicola in the Tropical Andes, with observations on nesting biology and a phylogenetic analysis of the subgenera (Hymenoptera: Colletidae, Xeromelissinae)Published in Scientific Papers Natural History Museum the University of Kansas, in 2002, in volume 26, pages 1-47
The bee genus Chilicola in the Tropical Andes, with observations on nesting biology and a phylogenetic analysis of the subgenera (Hymenoptera: Colletidae, Xeromelissinae)Published in Scientific Papers Natural History Museum the University of Kansas, in 2002, in volume 26, pages 1-47