Taxonomic overview of the greater fritillary genus Speyeria Scudder and the atlantis - hesperis species complexes, with species accounts, type images, and relevant literature (Lepidoptera: Nymphalidae) Author Dunford, James C. text Insecta Mundi 2009 2009-09-26 2009 90 1 74 journal article 10.5281/zenodo.5352660 1942-1354 5352660 Speyeria hesperis hanseni Emmel, Emmel, and Mattoon, 1998 , new species combination ( Figure 34 ) Speyeria atlantis hanseni Emmel, Emmel, and Mattoon, 1998c: 152 . Common name. Hansen’s fritillary Type deposited. Holotype at Natural History Museum of Los Angeles County ( Figure 34 ). Type locality. Covelo Road, Anthony Peak, Tehama County, California . Type label data. I have not examined the label data associated with this specimen. Emmel et al. (1998c) provide the following data: “ Holotype male: California , Tehama County ; Anthony Peak on Covelo Road , 4 July 1968 , leg. S. O. Mattoon ” . Identification, taxonomy, and variation. Similar to S. h. dodgei and S. h. irene , S. h. hanseni is slightly duskier in appearance dorsally and more pale ventrally due to extensive cream scaling. Adult wingspan ranges from 50-55 mm . This taxon should be placed with western ‘ atlantis ’ forms that conform to the hesperis subspecies complex described by Scott et al. (1998) . Forms of this subspecies were likely referred to as Speyeria hesperis [ atlantis ] irene (Boisduval) in the past. See also Dunford (2007). Range. This subspecies is known in the North Coast Ranges from Glenn County northwestward to central Humboldt County ( Emmel et al. 1998c ). Life history. Speyeria hesperis hanseni flies from late June to early August, with a peak flight period during early July.