Canoa Ranch Rest Area (northbound) Hwy 19
Pima County, Arizona
Coordinates: 31.765192, -111.034699
Elevation: 2,991 ft
October 4, 2019
Size: 3.2 mm
Attracted to mercury vapor and ultraviolet lights
Determined by Salvador Vitanza
Confirmed by David McCoy who said: “Based on the 1948 H.G. Barber paper (Some New Lygaeidae Chiefly From The United States) and perusing a paper dealing with T. biguttula, I believe your ID to be accurate: T. biguttula. See the following comment separating T. biguttula from T. testacea: Besides a marked difference in color testacea differs from Stal’s biguttula from Texas as follows: head and pronotum relatively narrower, anterior lobe of the latter less distinctly puncatate, clavus with three rows of punctures and the apical of corium more profusely punctate.”