common sawfly

(Macrophya trisyllaba)

Conservation Status
common sawfly (Macrophya trisyllaba)
Photo by Alfredo Colon
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Macrophya trisyllaba is a black, small to medium-sized, common sawfly.

The female averages (10 mm) in length. The head is black with white mouthparts and often a pair of white spots on the back of the head. The antennae have 9 segments. They are thread-like, entirely black at the base, and entirely white on segments 5 to 9 or 6 to 9. Rarely, they are all black.

The plate covering the thorax (pronotum) is black with white markings. There is a white spot on each side of the forward (dorsal) edge of the pronotum. The two spots are sometimes narrowly connected. There is also a pair of spots in the middle of the pronotum that usually merge into a single V-shaped spot. These spots may be bold and conspicuous, small and partially developed, or even absent. The triangular plate between the wing bases (scutellum) is partly or entirely white.

The thorax and abdomen are broadly connected. The abdomen is usually entirely black, sometimes with the forward edge of some or all of the segments white.

The fourth segment (tibia) of the front leg has two spurs at the tip. The third and largest leg segment (femur) on the front and middle legs are white in front, black in back. The hind legs are black except for the small first segment, which is white.

The wings are smoky and clear.

The male is slightly smaller, averaging (9 mm) in length. The antennae are often entirely black. The underside of the abdomen is often entirely white. It is otherwise similar to the female.

 
     
 

Size

 
 

Total Length:

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

 

 
     
 
Biology
 
 

Season

 
 

 

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

 

 
     
 

Larva Food

 
 

elderberry (Sambucus)

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 29, 30.

 
  11/29/2018      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
 

Order

Hymenoptera (ants, bees, wasps, and sawflies)  
 

Suborder

Symphyta (horntails, sawflies)  
 

Superfamily

Tenthredinoidea (sawflies)  
 

Family

Tenthredinidae (common sawflies)  
 

Subfamily

Tenthredininae  
  Tribe Macrophyini  
 

Genus

Macrophya  
       
 

Synonyms

 
 

Macrophya zonalis

 
       
 

Common Names

 
 

No species in this genus has a common name, nor does the genus itself. The common name for the family Tenthredinidae is common sawflies, and is applied here for convenience.

 
       

 

 

 

 

 

Glossary

Femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

Pronotum

The saddle-shaped, exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

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.

 

 

 

 

 

 
 
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Alfredo Colon

 
    common sawfly (Macrophya trisyllaba)   common sawfly (Macrophya trisyllaba)  
           
 
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  Alfredo Colon
6/10/2018

Location: Woodbury, Minnesota

common sawfly (Macrophya trisyllaba)  
  Alfredo Colon
6/8/2018

Location: Woodbury, Minnesota

common sawfly (Macrophya trisyllaba)  
           
 
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Created: 8/16/2019

Last Updated:

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