Common Name is Sidewalk Tiger Beetle or Punctured Tiger Beetle
Species Cicindela punctulata - Sidewalk Tiger Beetle
Phylum Arthropoda - Arthropods
Class Insecta - Insects
Order Coleoptera - Beetles
Suborder Adephaga - Ground and Water Beetles
Family Carabidae - Ground Beetles
Subfamily Cicindelinae - Tiger Beetles
Tribe Cicindelini
Genus Cicindela
Species punctulata - Sidewalk Tiger Beetle

The ones found in NW Colorado are more heavily maculated than those of this species found elsewhere.