Taxon classification Animalia Diptera Bombyliidae

Heterostylum croceum Painter, 1930 Figure 4

Material examined.

REE: Apr (1 F).

Known Nearctic records.

Mexico (Coahuila); USA (Colorado, Kansas, Missouri, New Mexico, Texas).

Comments.

Heterostylum croceum is recorded for the first time in Mexico; previously known from the southern-central United States. Hall and Evenhuis (1980) suggest that Heterostylum croceum may be related to Heterostylum engelhardti Painter, 1930 or even be a subspecies of that taxon, Heterostylum croceum is the eastern form and Heterostylum engelhardti the western form (Arizona, California, Texas, Utah) although both species are present in Texas. Cunha et al. (2007) comment that Heterostylum engelhardti can be distinguished by the presence of white to very pale yellow hair and brown-tipped hairs on the abdomen compared with the darker yellow hairs in Heterostylum croceum .