1909-description
Guides
Diplotaxis fissilabris
A small scarab beetle in the genus Diplotaxis, first described by Fall in 1909. Members of this genus are commonly known as chafers and are typically nocturnal, attracted to lights. The specific epithet "fissilabris" refers to a cleft or split lip, likely describing a distinctive labral feature. The species occurs in the southwestern United States and northwestern Mexico.
Holopogon umbrinus
Holopogon umbrinus is a species of robber fly (family Asilidae) described by Back in 1909. It is classified within the subfamily Brachyrhopalinae and the genus Holopogon, which comprises small to medium-sized predatory flies. The species epithet 'umbrinus' (meaning 'shadowy' or 'dusky' in Latin) likely refers to its coloration. Like other asilids, it is presumed to be an aerial predator of other insects, though specific natural history details remain poorly documented.
Systropus arizonicus
Arizona bee fly
Systropus arizonicus is a species of bee fly in the family Bombyliidae, first described by Banks in 1909. The species is native to the southwestern United States and adjacent Mexico, with confirmed records from Arizona and Mexico. Like other members of the genus Systropus, this species is parasitic in its larval stage. The genus belongs to the subfamily Toxophorinae, a group characterized by their distinctive wing venation and parasitic life history.