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Pigeon tremex

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Tremex columba

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Pigeon tremex look like long, cylindrical wasps. The thorax is reddish-brown and the abdomen is marked with yellow and black bands. The wings vary from golden brown to black. The adults of both sexes have pointed appendages at the end of the abdomen. The females also have a long, slender egg-laying organ, called an ovipositor. The adults are from 2.5 to 5 cm long, with the females slightly larger than the males.

The white larvae, 5 cm long, have light brown heads and a black spine at the tip of the abdomen. Their legs are relatively undeveloped.

Horntails

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Horntails are related to wasps. The adults have thick, cylindrical black or metallic blue bodies from 2.5 to 4 cm long. The males are generally smaller, but more colourful than females. They sometimes have yellow or red markings. They have four translucent wings, and are powerful, skilful fliers. Their name comes from the horn-shaped appendage at the end of the abdomen, on both sexes. The females also have a long, slender egg-laying organ called an ovipositor, at the tip of the abdomen. The soft, whitish larvae can be up to 4.5 cm in length

Great golden digger wasp

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Sphex ichneumoneus

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These insects owe their name to the short golden hairs that cover the thorax and head. 

They have black antennae and orange or golden brown wings. The legs are orange, except for the coxa, the part nearest the body, which is black. Great golden digger wasps have a narrow waist and a bi-coloured abdomen: orange-red in front and black behind. Their total length is 15 to 27 mm, and males are slightly smaller than females.

Sphecid wasps

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These insects come in widely varying sizes (10 to 55 mm long), but all have an elongated abdomen attached to the thorax by a characteristic “thread-waisted” long, narrow, petiole-shaped structure. They may be entirely black or brown or dark with white, yellow or red markings. The females’ forelegs often have specialized structures for digging.

The larvae are pale coloured and legless. 

In the past, the Sphecid family included the Crabronidae [lien], a fairly similar-looking group of wasps that now forms a separate family. 

Virescent green metallic bee

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Agapostemon virescens

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These bees are recognizable by their metallic green head and thorax. The eyes are droplet shaped, and their antennae are highly visible. The female’s abdomen is black, with bands of white hair, while the male’s is black with hairless bands. Their translucent wings are slightly smoke-coloured or amber.

The males are 10 mm long and the females, 11 mm.

Giant ichneumon

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Megarhyssa atrata

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These insects look like large, slender wasps. They have a yellow head with a dark stripe between the eyes. The thorax and abdomen are dark, either black or dark brown. Their long legs are mainly yellow, while their four elongated, narrow wings are almost black.

Females have an impressive 12- to 15-cm long dark brown ovipositor.

This species resembles two other ichneumons found in the same habitat in Quebec: Megarhyssa macrurus and M. greenei. Giant ichneumons are recognizable by their blackish-brown abdomens. In addition, they have the longest ovipositors.

Ichneumon wasps

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These insects generally resemble wasps, but their antennae are longer and more segmented.

In many species, the female’s abdomen ends in a filament even longer than the rest of the body. This egg-laying organ is called an ovipositor.

The vast ichneumon group comprises thousands of species, ranging widely in size (from 3 to 50 mm long) and coloration. Many are a single colour, varying from yellowish to black, while others are bicoloured, black and brown or black and yellow.

Sand wasp

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Bembix americana

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These black wasps have greenish-yellow bands on their abdomens. Their legs are yellow, except for the parts nearest their bodies. Their wings are transparent, with brown veins. They are 13 to 16 mm long.

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