Ampulicid Wasp

toward the front and somewhat necklike. Mesosternum with a forked process posteriorly. Parapsidal sutures distinct.

Ampulicids are rather rare. Nests are built in various protected situations, and are provisioned with immature cockroaches.

SPHECID WASPS Family Sphecidae See also PL 16

Identification: Pronotum short and collarlike. Mesosternum without a forked process posteriorly. Parapsidal sutures indistinct or absent.

This large family contains many common wasps. There are 9 subfamilies, differing in appearance and habits, in N. America.

Astatine Wasps, Subfamily Astatinae. Dark-colored, mostly about 15 mm. Eyes large, often meeting dorsally in male. Middle tibiae with 2 apical spurs. HW with vannal lobe large and jugal lobe small. Marginal cell in FW truncate apically, marginal vein continuing a short way beyond end of cell. 3 submarginal cells in FW. Astatinae nest in the ground and provision their nests with bugs; they are not common.

Sand-loving Wasps, Subfamily Larrinae. Most species are brownish and 10-20 mm. Middle tibiae with 1 apical spur. FW with 3 submarginal cells, 3rd often oblique, and marginal vein usually continuing a way beyond tip of marginal cell. Mandibles generally notched on outer margin. Lateral ocelli often distorted, not round. These wasps nest in sandy areas and provision their nests with grasshoppers or crickets.

Organ-pipe Mud-daubers, Subfamily Try poxy loninae. Slender, black. FW with 1 submarginal cell, and marginal cell pointed apically. Inner margins of eyes notched. Some make tubular nests of mud, and others nest in natural cavities; all provision their nests with spiders.

Aphid Wasps, Subfamily Pemphredoninae. Usually black, 8-15 mm. Middle tibiae with 1 apical spur. Marginal cell in FW pointed apically. Abdomen sometimes with a slender basal stalk. Pemphredonini have 2 (rarely 1) submarginal cells in the front wing, and the antennae rise very low on the face; some nest in the ground, others in twigs, and they provision with aphids or thrips. Psenini have 3 submarginal cells in the front wing, and antennae rise near middle of the face; they nest in natural cavities or in the ground, and provision their nests with hoppers (Homoptera).

Thread-waisted Wasps, Subfamily Sphecinae. Abdomen stalked at base. HW with a large vannal lobe. Middle tibiae with

2 apical spurs. Mostly 20-30 mm. Common wasps, grouped in

3 tribes. (1) Ammobiini: blackish or brownish, wings clear or dark. 2 or more basal teeth on front tarsal claws, only 1 recurrent vein meets 2nd submarginal cell, and discoidal vein in HW rises at anterior end of transverse median vein. They nest in

ORGAN-PIPE MUD-DAUBER"

Head of Aphid Wasps

Psenini

Astata

0 0

Post a comment