Allograpta obliqua

Allograpta obliqua is a common North American species of hoverfly, commonly known as oblique streaktail. The larvae are important predators of aphids while adults are pollinators.^[1]

Allograpta obliqua
Allograpta obliqua
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Syrphidae
Genus:	Allograpta
Species:	A. obliqua
Binomial name
Allograpta obliqua (Say, 1823)
Synonyms
Scaeva obliqua Say, 1823 Syrphus baccides Walker, 1849 Syrphus dimemsus Walker, 1852 Syrphus securiferus Macquart, 1842 Syrphus signatus Wulp, 1867

Description

Adults are 6–7 mm long, with yellow stripes on the thorax and cross banding on the abdomen with four longitudinal, yellow stripes or spots on the fourth and fifth tergite. The face is yellow and lacks a complete median stripe. Males have holoptic eyes and females have dichoptic eyes.^[1]

Eggs are white, oval, and about 0.84 mm in length. Larvae reach 8–9 mm.^[1] They are bumpy and slug-like.^[2]

Life history

Adults of A. obliqua occur throughout the year in the southern part of their range. Eggs are laid on surfaces leaves or branches near aphids. Larvae hatch in two to eight days and feed on the aphids.^[1]

Distribution

Found in most of the continental United States, New York State. Quebec in Canada, Bermuda, Mexico, and some parts of the Neotropical Americas, and the West Indies.^[1]