quadrate snipe fly

(Chrysopilus quadratus)

Conservation Status
quadrate snipe fly
Photo by Alfredo Colon
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
           
           
           
           
 
Description
 
 

Quadrate snipe fly is a small fly. It occurs in the United States east of the Great Plains and in southern Canada. It is fairly common in Minnesota. Adults are found from May to September in woodlands. Larvae are found in rotting wood and in leaf litter.

Females are ¼ to 516 (7.0 to 8.0 mm) long, males a little smaller, ¼ (6.0 to 6.5 mm) long. Females are tan or orangish brown with brown or dark brown markings. Males are darker; brown with blackish-brown markings, or dark orange with few contrasting markings.

The head is more or less rounded. There are two large compound eyes on the side of the head and three small simple eyes (ocelli) in a triangle on top of the head. The back of the head is densely covered with long golden hairs. On the male the compound eyes are very large and meet at the top of the head. The front of the head is light gray and is covered on the lower half or two thirds with fine pale hairs. On the female the compound eyes are smaller and widely separated. The front of the head is brownish to almost blackish and is more or less covered with short, stiff, blackish hairs. On both sexes the antennae have three segments. The third segment is cone shaped, is not divided by rings (annulated), and bears a long, slender style (arista) at the end. The arista is distinctly longer than the antenna.

The thorax has three segments. It is densely covered with short golden hairs. The genus name Chrysopilus translates to “gold hair”. The sides of the third segment (metapleura) are densely hairy.

The abdomen on the male is narrow and tapered. On the female it is broad and is tapered at least on the lower half. Each abdominal segment may be dark on the front half and light on the back half, mostly light with a narrow dark band in front, or entirely light with no dark marking.

The wings are mostly clear with darker brown markings. They are and tinged brownish, especially above the middle. A cell (stigma) on the leading edge (costal margin) is dark. Midway between the base and the wingtip there is a large, well-defined, almost rectangular, dark patch. The patch joins with the stigma and extends to the discal cell. Near the base of the wing there is a small, round, dark spot. The anal cell is longer than the second basal cell and is narrow but open at the wing margin.

The legs are yellowish and relatively long. On the front legs the fourth segment does not have spurs at the end. On the hind legs there is just one spur at the end of the tibia.

 
     
 

Size

 
 

Male: ¼ (6.0 to 6.5 mm)

Female: ¼ to 516 (7.0 to 8.0 mm)

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

Woodlands

 
     
 
Biology
 
 

Season

 
 

May to September

 
     
 

Behavior

 
 

Like other eastern snipe flies, quadrate snipe fly does not bite.

 
     
 

Life Cycle

 
 

 

 
     
 

Larva Food

 
 

 

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30, 82

Leonard, M. D. (1930). A Revision of the Dipterous Family Rhagionidae (Leptidae) in the United States and Canada. United States: American Entomological Society.

 
  1/1/2021      
         
 

Occurrence

 
 

Fairly common

 
         
 
Taxonomy
 
 

Order

Diptera (gnats, mosquitoes, true flies)  
 

Suborder

Brachycera (circular-seamed flies, muscoid flies, short-horned flies)  
 

Infraorder

Tabanomorpha  
 

Superfamily

Rhagionoidea  
 

Family

Rhagionidae (snipe flies)  
 

Subfamily

Rhagioninae  
 

Genus

Chrysopilus  
       
 

Orthorrhapha was historically one of two infraorders of Brachycera, a suborder of Diptera. However, it did not contain all of the descendants of the last common ancestor (paraphyletic). It was split into five extant (still existing) and one extinct infraorder. Orthorrhapha is now considered obsolete and has not been used in decades, but it persists in printed literature and on some online sources. A recent revision of the order Diptera (Pope, et al., 2011) revived the name Orthorrhapha, but this has not been widely accepted.

 
       
 

Synonyms

 
 

Chrysopilus dispar

Chrysopilus flavidus

Leptipalpus limbipennis

Leptipalpus obscuripennis

Leptis fumipennis

Leptis quadratus

 
       
 

Common Names

 
 

quadrate snipe fly

 
       

 

 

 

 

 

 

 

Glossary

Arista

A large bristle on the upper side of the third segment of the antenna of a fly.

 

Costal margin

The leading edge of the forewing of insects.

 

Ocellus

Simple eye; an eye with a single lens. Plural: ocelli.

 

Stigma

In plants, the portion of the female part of the flower that is receptive to pollen. In Lepidoptera, an area of specialized scent scales on the forewing of some skippers, hairstreaks, and moths. In other insects, a thickened, dark, or opaque cell on the leading edge of the wing.

 

 

 

 

 

 
 
Visitor Photos
 
           
 

Share your photo of this insect.

 
  This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more photos and, if you like, a caption.
 
 

Alfredo Colon

 
    quadrate snipe fly      
           
 
MinnesotaSeasons.com Photos
 
 

 

 
           
           

 

Camera

     
 
Slideshows
 
 
     
     
     

 

slideshow

       
 
Visitor Videos
 
       
 

Share your video of this insect.

 
  This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach a video, a YouTube link, or a cloud storage link.
 
 

 

 
     
     
       
       
       
 
Other Videos
 
     
     
     
       

 

Camcorder

 
 
Visitor Sightings
 
           
 

Report a sighting of this insect.

 
  This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Be sure to include a location.
 
  Alfredo Colon
8/8/2019

Location: Woodbury, MN

quadrate snipe fly  
           
 
MinnesotaSeasons.com Sightings
 
 

 

 

 

 

Binoculars


Created: 1/1/2021

Last Updated:

About Us | Privacy Policy | Contact Us | © 2021 MinnesotaSeasons.com. All rights reserved.