Triepeolus remigatus (Fabricius, 1804)
Bahia absinthifolia var. dealbata (Gray) Gray, Centaurea repens [= Acroptilon repens (L.) DC.], Cichorium intybus L., Cosmos sp., Crotalaria incana L., Eriogonum abertianum neomexicanum (= Eriogonum abertianum Torr.), E. deflexum Torr., Eupatorium linearifolium (= Eupatorium glaucescens Ell.), Gaillardia pulchella Foug., Helianthus annuus L., H. ciliaris DC., Kallstroemia grandiflora Torr. ex Gray, Melilotus alba [= Melilotus officinalis (L.) Lam.], Petalostemon sp. (= Dalea sp.), Sphaeralcea fendleri Gray ssp. elongata Kearney, Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray, Vernonia noveboracensis (L.) Michx., China aster [= Callistephus chinensis (L.) Nees], “cultivated cucurbits”.
Females of T. remigatus can be distinguished by the anchor-shaped region of black setae on the mesoscutum in combination with the nearly uniform, darkly shining setae of the pseudopygidial area. Males of T. remigatus resemble T. concavus; however, in T. remigatus the paramedian bands and yellow setae on the anterior margin of the mesoscutum form a strong anchor pattern, while in T. concavus the paramedian bands are not distinct from the region of dense yellow setae on the anterior third or fourth of the mesoscutum. Triepeolus remigatus is also similar to T. nevadensis, but in T. nevadensis the paramedian bands are not so strongly developed as in T. remigatus, the mesoscutum is more distinctly shining, the scutellum is more flattened and extended posteriorly, and the T1 discal patch is distinctly rectangular (as opposed to ovate or subtriangular in T. remigatus). The males have white banding only on S3 in T. nevadensis (as opposed to both S2 and S3 in T. remigatus).
Dieunomia (Dieunomia) heteropoda (Say); Centris sp., Peponapis pruinosa (Say)?, Xenoglossa strenua (Cresson)
MéXICO: Chihuahua; Coahuila, Durango, Jalisco, San Luis Potosí, Sinaloa, Sonora, Zacatecas; USA: Arizona, California (Tulare Co. south to Riverside Co. and San Diego Co.), Colorado, Delaware, Georgia, Illinois, Indiana, Iowa, Kansas, Louisiana, Maryland, Mississippi, Missouri, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Pennsylvania, Tennessee, Texas, Virginia, Washington D.C.