Genus Rhynchanthrax
Rhynchanthrax capreus
Dark wing infuscation is lacking but there is a subtle smokiness to the wings at the costa. Also there is some coloration in the 1st basal cell, at the r-m crossvein, and at the base of the 4th posterior cell. Note also the stump vein in the third submarginal cell. The abdomen is patterned mostly in shades of tan.
Range: COCH, GRAH
Occurs: Mid-August to Mid-September
Rhynchanthrax rex
This is a medium-sized species with 50% black infuscation of the wings and, in fresh specimens, a pronounced white band across the scutellum. The legs are usually covered with dark scales. It occurs mostly at middle altitudes. Differentiating this taxon from the Eastern species, R. parvicornis, not currently documented from SE Arizona, is not always easy and sometimes the best alternative is to call the insect "Rhynchanthrax sp.".
Range: COCH, GRAH, GREE, PIMA, PNAL, STCR
Occurs: Late February to Late May
Rhynchanthrax texana
Although this species is common, at least during some years, it is fairly small, and often flies within the subcanopy, making it easy to overlook. The wings are 50% infuscated and the abdomen is orange-sided, giving it a similar appearance to Chrysanthrax cypris.
Range: COCH, GRAH, PIMA, PNAL, STCR
Occurs: Late July to Mid-September, One Early May Record
Also reported non-specifically from the region is R. quivera