Recent Past Projects

Spiders of the Arid Southwest (Still ongoing)

Project with David Allen Dean, Sandra Brantley and Bruce Cutler.

Biological control and arthropod associations of range weeds.

Keys to Salticidae

Project with Bruce Cutler and G. B. Edwards, also Clubionidae, Corinnidae, Liocranidae, Miturgidae, Tengellidae, Anyphaenidae and Zorocratidae (all with Darrell Ubick) for what was at first considered only an update of Roth's Spider Genera of North America. It became a whole new book Finished in 2004. Spiders of North America published in 2005. New revision (2nd Ed.) to combine several families and to recognize several others, based on recent research. I now am author or coauthor on ten chapters.

Spider biodiversity on the Jornada of New Mexico

With Sandra Brantley of the Museum of Southwestern Biology at the University of New Mexico. Now published.

Revision of the genus Sassacus

This project is now finished after the examination of nearly 2000 specimens from around North America (British Columbia to Central America). A total of nine species were described of which three were new species from Mexico. One of the new species will eventually fall into a new genus associated with the South American "Sassacus" arcuatus group. Now published.

Spiders as predators of introduced biocontrol agents on Saltcedar

Spiders may affect the success of a introduced beetle for the control of saltcedar in the western United States. Study with Eric Knutson now published.