Paragus

Latreille, 1804

Grass Skimmer Flies

Species Guides

Paragus angustifrons(Narrow-faced Grass Skimmer)
Paragus haemorrhous(Black-backed Grass Skimmer)

Paragus is a of hoverflies ( Syrphidae) comprising over 100 distributed worldwide except Antarctica. The genus is notable for its predatory larvae that feed on aphids, making it an important group for . are frequently observed visiting small flowering plants for nectar and pollen. Several subgenera are recognized, including Afroparagus, Pandasyopthalmus, Paragus, and Serratoparagus.

Paragus by (c) Paul Cook, some rights reserved (CC BY), uploaded by Paul Cook. Used under a CC-BY license.

Paragus by (c) Katja Schulz, some rights reserved (CC BY), uploaded by Katja Schulz. Used under a CC-BY license.

Paragus by (c) Barry Cottam, some rights reserved (CC BY), uploaded by Barry Cottam. Used under a CC-BY license.

Pronunciation

How to pronounce Paragus: //ˈpæ.ɹə.ɡəs//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Habitat

Larvae develop in colonies on various plants, including fruit trees, reeds (Phragmites), and agricultural crops. frequent open where small flowering plants are abundant. Specific habitat associations vary by ; for example, Paragus hyalopteri has been collected on Phragmites australis in association with aphid colonies.

Distribution

Worldwide distribution except Antarctica. Documented from the Palearctic (Europe, Iran), Nearctic (North America), Afrotropical (Ghana, Réunion), and other regions. Distribution records include Denmark, Norway, Sweden, Vermont (USA), and the US broadly.

Diet

Larvae are obligate of aphids (Aphididae). Documented prey includes Hyalopterus pruni (mealy plum aphid), Toxoptera aurantii (black citrus aphid), and other . feed on nectar and pollen from small flowering plants such as Polygonum (knotweed), Anagallis arvensis (Scarlet Pimpernel), Veronica persica (Common Field Speedwell), and Medicago lupulina (Black Medick).

Host Associations

Hyalopterus pruni - preymealy plum aphid; documented for P. hyalopteri
Toxoptera aurantii - preyblack citrus aphid; documented for P. borbonicus on cocoa in Ghana
Phragmites australis - larval development site for P. hyalopteri
Arundo donax - documented for P. hyalopteri
Theobroma cacao - cocoa plantations; documented for P. borbonicus in Ghana

Life Cycle

Complete with four stages: , three larval instars, , and . The full has been described in detail for Paragus hyalopteri, including egg , all three larval stages, and puparium structure. Larvae develop within colonies on plants.

Behavior

are diligent foragers on small flowering plants, often overlooked due to their diminutive size. Larvae are active within colonies. Female oviposition occurs in or near aphid colonies to ensure larval food availability.

Ecological Role

Important agents of pests in agricultural and natural . Contributes to natural pest suppression in crops including fruit trees and cocoa. serve as of small, often overlooked flowering plants.

Human Relevance

Valued as agents for agricultural pest management, particularly for control in orchards and field crops. The has been studied specifically for its potential in programs.

Similar Taxa

other Syrphidae generaParagus can be distinguished from similar small hoverflies by a combination of morphological characters including facial features and male genitalia structure; precise identification often requires examination of terminalia

More Details

Subgeneric classification

The is divided into four subgenera: Afroparagus (Afrotropical ), Pandasyopthalmus (includes Holarctic P. crenulatus group), Paragus (largest subgenus, worldwide), and Serratoparagus (characterized by serrated abdominal margins). This classification reflects biogeographic and morphological patterns but may be revised with further study.

Taxonomic research status

The has undergone recent revision in the New World, with six new Nearctic described. The stages of only about 9 of 27 known larvae had been described prior to detailed studies of P. hyalopteri, indicating significant gaps in larval knowledge.