Osten-sacken-1877
Guides
Chrysops surdus
deer fly
Chrysops surdus is a species of deer fly in the family Tabanidae, described by Osten Sacken in 1877. The species is distributed across northern North America, including Canada and the United States. Deer flies in the genus Chrysops are blood-feeding flies known for their painful bites and are recognized as significant biting pests in their range.
Cyrtopogon sudator
Cyrtopogon sudator is a species of robber fly in the family Asilidae, described by Osten Sacken in 1877. As a member of the genus Cyrtopogon, it belongs to a group of predatory flies characterized by their distinctive morphology and hunting behavior. Very few specific observations of this species have been documented in public databases, with only one iNaturalist record identified.
Pantarbes capito
Pantarbes capito is a species of bee fly (family Bombyliidae) described by Osten Sacken in 1877. It is known from the southwestern United States, with records spanning from California to Wyoming. As a member of the bee fly family, it belongs to a group of flies that are typically pollinators and often parasitoids of other insects. The genus Pantarbes is classified within the subfamily Cythereinae.
Procecidocharoides penelope
Procecidocharoides penelope is a species of fruit fly in the family Tephritidae. It is distributed across northern North America, with records from Canada and the United States. As a member of the subfamily Tephritinae and tribe Dithrycini, it belongs to a group of tephritid flies often associated with gall formation or plant-feeding habits. The species was described by Osten Sacken in 1877.
Protanyderus vipio
Protanyderus vipio is a species of primitive crane fly in the family Tanyderidae. The genus Protanyderus contains some of the most archaic members of the Diptera, retaining characteristics that reflect the early evolutionary history of true flies. This species was described by Osten Sacken in 1877. Very few observations of this species exist in public databases, suggesting it is either genuinely rare, poorly surveyed, or restricted to specific habitats.
Sphecomyia brevicornis
Short-horned Yellowjacket Fly
Sphecomyia brevicornis is a species of syrphid fly (flower fly) notable for its striking mimicry of yellowjacket wasps. It belongs to a small genus of wasp-mimicking flies that exhibit exceptional morphological convergence with vespid wasps. The species was described by Osten Sacken in 1877. Its specific epithet 'brevicornis' refers to the relatively short antennae compared to related species.