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.