UCCE Sonoma County
University of California
UCCE Sonoma County


Treehoppers are identified by the enlarged and elongated first thorax segment (pronotum) which projects above the head and extends back over the abdomen.

Species covered here are:

  • Threecornered alfalfa hopper 
    (Spissistilus festinus)
  • Tortistilus albidosparsus.

Key characteristics distinguishing these two species are:

  1. size
  2. where lateral ridges join.

See attached handout for detailed photos.

University of California Cooperative Extension, Sonoma County
133 Aviation Blvd Suite 109, Santa Rosa, CA 95403  Phone: 707.565.2621  Fax: 707.565.2623
Office Hours:  M-F, 8am-Noon & 1pm-4pm

Like us on Facebook: UCCE Sonoma                        Follow us on Twitter @UCCESonoma 

Webmaster Email: klgiov@ucanr.edu