common sawfly

(Macrophya pulchella)

               
Conservation Status

IUCN Red List

not listed

common sawfly (Macrophya pulchella)

 

NatureServe

not listed

Minnesota

not listed

Occurrence

 

Flight/Season

 

Habitat/Host

 

Size

Male: ¼ (7 mm)

Female: 5 16 (7.5 mm)

Photo by Alfredo Colon

Identification

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

The female averages 5 16 (7.5 mm) in length. The head is black. The mouth parts are white. The antennae have 9 segments. They are thread-like, cylindrical, and entirely black.

The plate covering the thorax (pronotum) is black and with yellow markings. There is a yellow stripe wrapping around the forward (dorsal) edge of each side of the pronotum. The forward (anterior) portion of the stripe is narrow, the lateral portion is narrow to wide. The squarish plate at the base of each wing (tegula) is yellow. The triangular plate between the wing bases (scutellum) is yellow. The yellow spot on the scutellum is not divided or notched.

The thorax and abdomen are broadly connected. The basal plate of the abdomen is always black. The first one or two abdominal segments are sometimes black. The sheaths on the ovipositor are partly or entirely black. The remainder of the abdomen is orangish-brown.

The front and middle legs are mostly yellow to pale yellow. The tip of the fourth segment (tibia) is sometimes black. The last five segments (tarsi) together correspond to the foot of the insect. They are pale yellow with a narrow black tip. The hind leg is mostly yellow with black at the base, of the first segment, on the outer (apical) half to two-thirds of the third segment (femur), and the base and the tip of the tibia. The tarsi are pale yellow to almost white, with the base of the first segment and the upper surface of the last segment brown. The fourth segment (tibia) of the front leg has two spurs at the tip.

The wings are clear and evenly tinged dark brown.

The male is slightly smaller, averaging ¼ (7 mm) in length. The antennae are slightly flattened. The scutellum is usually entirely black, sometimes partially black. The abdomen is entirely black. On the hind leg, the tibia is entirely black or it may have an indistinct pale yellow spot on the forward (ventral) edge, but never a yellow band around it. The male is otherwise similar to the female.

 
Similar
Species

 


Larval Food

 

 
Adult Food

 

 
Life Cycle

 

 
Behavior

 


Distribution Distribution Map  

Sources: 29, 30.


Comments

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


Taxonomy

Order:

Hymenoptera (ants, bees, wasps, and sawflies)

 

Suborder:

Symphyta (horntails, sawflies)

 

Superfamily:

Tenthredinoidea (sawflies)

 

Family:

Tenthredinidae (common sawflies)

 

Subfamily:

Tenthredininae

 

Tribe:

Macrophyini

 
Synonyms

 

 
Common
Names

no common name


 

 

 

 

 

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.

 

Ocellus

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

 

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.

 

Tarsus

The last two to five subdivisions of an insect’s leg, attached to the tibia; the foot. Plural: tarsi.

 

Tegula

A small, hardened, plate or flap-like structure that overlaps the base of the forewing of insects in the orders Lepidoptera, Hymenoptera, Diptera, and Homoptera.

 

Tibia

The fourth segment of an insect leg, after the femur and before the tarsus (foot).

 

 

 

 

 

       

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Alfredo Colon


  common sawfly (Macrophya pulchella)   common sawfly (Macrophya pulchella)

       
       
       

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