white-spotted pond fly

(Sericomyia lata)

Conservation Status
white-spotted pond fly
Photo by Alfredo Colon
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
           
 
Description
 
 

White-spotted pond fly is a robust, medium-sized, long hoverfly. It is somewhat bee-like in appearance. It is found across southern Canada and in the United States from New England to Minnesota.

The face is short, projecting less than half the length of the compound eye below the compound eye. It is entirely yellow and does not have a black vertical stripe down the middle. There are two large compound eyes and three very small simple eyes (ocelli). The compound eyes are bare, without a covering of hairs. On the male they meet at the top of the head. On the female they do not. The ocelli are arranged in a small triangle at the top of the head. The antennae are short, no more than one-third the length of the face. There is a long bristle (arista) on the third segment of each antenna. It is about one and a half times as long as the antenna and has many fine filaments giving it a feathery appearance (plumose).

The thorax is slightly wider than long. It is black tinged with bronze, shiny, and unmarked. The plate between the abdomen and thorax (scutellum) is large, convex, and colored like the thorax. The scutellum has a fringe of long pale hairs.

The abdomen is oval and slightly longer than wide. It is black with pairs yellow marks on the second, third, and fourth segments. The yellow marks do not touch the lateral margin. The marks on the second abdominal segment are large and nearly round. Those on the third segment are smaller and separated in the middle, effectively two spots on each side. The marks on the fourth segment are even smaller, kidney-shaped, and placed at an oblique angle. The tip of the abdomen is sometimes reddish.

The wings are clear. The second cell on the leading edge of each wing toward the tip (pterostigma) is relatively broad and tinted brown. It does not have a cross vein. The marginal cell (R1) is open.

The legs do not have spurs. The third leg segment (femur) is not thickened.

 
     
 

Size

 
 

Total Length:

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

 

 
     
 
Biology
 
 

Season

 
 

 

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

 

 
     
 

Larva Food

 
 

Larvae filter pond water of decaying organic debris, obtaining nourishment from microorganisms.

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 29, 30.

 
  10/19/2018      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
 

Order

Diptera (gnats, mosquitoes, true flies)  
 

Suborder

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

Infraorder

Muscomorpha  
  No Rank Eremoneura  
  No Rank Cyclorrhapha  
  No Rank Aschiza  
 

Superfamily

Syrphoidea  
 

Family

Syrphidae (hover flies)  
 

Subfamily

Eristalinae  
 

Tribe

Eristalini  
  Subtribe Sericomyiina  
 

Genus

Sericomyia  
  Subgenus Sericomyia  
       
 

Synonyms

 
 

Condidea lata

 
       
 

Common Names

 
 

white-spotted pond fly

 
       

 

 

 

 

 

 

 

Glossary

Arista

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

 

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.

 

Pterostigma

The dark, blood-filled second cell at the leading edge of each wing toward the tip on many insects. It is heaver than adjacent, similar sized areas and is thought to dampen wing vibrations and signal mates. (= stigma. More precise than stigma but less often used, even by entomologists.)

 

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

 
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  Alfredo Colon
6/8/2018

Location: Woodbury, MN

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