stink fly

(Coenomyia ferruginea)

Conservation Status
stink fly
Photo by Luciearl
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
           
 
Description
 
 

Stink fly is a large awl fly. It occurs in Europe and in eastern North America. It is uncommon throughout its range, including in Minnesota. It is most known for its strong smell, hence the German common name Stinkfliege, which translates to “stinking fly.” Larvae feed on the larvae of bark beetles and other insects in the top layers of soil. Adults are sluggish and are found on foliage.

Adults are robust, relatively soft-bodied, and to 1116 (16 to 18 mm) long. The head is small. There are two large compound eyes, one on each side of the head, and three small simple eyes (ocelli) in a triangle on top of the head. The eyes are black and hairy. The antennae are short and have three segments. The third segment has ring-like subdivisions. There is no bristle-like style (arista). The thorax is humped. The exoskeletal plate between the thorax and abdomen (scutellum) has two spine-like protuberances. The wings are brownish-yellow. The anal cell is longer than the second basal cell and is open at the wing margin. The last part of the leg (tarsus), corresponding to the foot, has five segments. The last segment has three pads.

On males the the compound eyes meet at the top of the head. The thorax is dark brown. The abdomen is shorter than the wings and is mostly dark brown with some light brown spots on the sides of the abdomen. The front and middle legs are light brown, the hind legs are dark brown.

On females the compound eyes do not meet. The thorax is shiny orange or reddish-brown. The abdomen is pale orange or almost white and very large, extending beyond the wings. All legs are light brown.

 
     
 

Size

 
 

Total Length: to 1116 (16 to 18 mm)

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

 

 
     
 
Biology
 
 

Season

 
 

April to June (North Carolina)

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

 

 
     
 

Larva Food

 
 

Larvae of bark beetles and other insects in the upper layers of soil

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30, 82, 83.

 
  9/25/2020      
         
 

Occurrence

 
 

Uncommon in Minnesota

 
         
 
Taxonomy
 
 

Order

Diptera (gnats, mosquitoes, true flies)  
 

Suborder

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

Infraorder

Xylophagomorpha  
 

Family

Xylophagidae (awl flies)  
 

Subfamily

Coenomyiinae  
 

Genus

Coenomyia  
       
 

Synonyms

 
 

Coenomyia cinereibarbis

Coenomyia pallida

Musca ferruginea

 
       
 

Common Names

 
 

stink fly

 
       

 

 

 

 

 

 

Glossary

Ocellus

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

 

Scutellum

The exoskeletal plate covering the rearward (posterior) part of the middle segment of the thorax in some insects. In Coleoptera, Hemiptera, and Homoptera, the dorsal, often triangular plate behind the pronotum and between the bases of the front wings. In Diptera, the exoskeletal plate between the abdomen and the thorax.

 

Tarsus

On insects, the last two to five subdivisions of the leg, attached to the tibia; the foot. On spiders, the last segment of the leg. Plural: tarsi.

 

 

 

 

 

 
 
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Luciearl

 
    stink fly      
           
 
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  Luciearl
6/5/2020

Location: Cass County

stink fly  
           
 
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Created: 9/25/2020

Last Updated:

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