Sierolomorphid Waspsnot illus

Family Sierolomorphidae Identification: Shining black wasps, 4.5-6.0 mm. No jugal lobe in HW.

These wasps are widely distributed but are quite rare. Their immature stages are unknown.

TIPHIID WASPS Family Tiphiidae See also PL 15

Identification: Mesosternum with 2 posterior lobes, or abdominal segments separated by rather strong constrictions.

Five of the 6 subfamilies of Tiphiidae occurring in the U.S. deserve special mention. The Tiphiinae, Myzininae, and Brachycistidinae have 2 posterior lobes on the mesosternum, the has an upcurved spine at end of the abdomen, and the 9 is usually winged; the mesosternum of Methochinae and Myrmosinae lacks lobes (or has a pair of small toothlike projections posteriorly), the cT sometimes has an upcurved spine at the end of the abdomen, the abdominal segments are separated by fairly strong constrictions, and the 9 is wingless.

Subfamily Tiphiinae. Black, short-legged, and generally 10-20 mm. Middle tibiae with 1 apical spur. These wasps are fairly common and widely distributed; their larvae parasitize white grubs.

Subfamily Myzininae (PI. 15). Black and yellow, longer-legged, and generally over 20 mm. Middle tibiae with 2 apical spurs. These wasps are also fairly common and widely distributed, and most species parasitize various beetle larvae.

Subfamily Brachycistidinae (not illus.). Brownish. Middle tibiae with 1 apical spur. 9 wingless. These wasps are restricted to the western states and are mostly nocturnal.

Subfamily Methochinae. Thorax of 9 divided into 3 parts. cf with a spine at end of abdomen, d" 15 mm. or less, 9 much smaller. Black or brownish. This is a small but widely distributed though not common group. Larvae parasitize tiger beetles.

Subfamily Myrmosinae. Similar to Methochinae but thorax of 9 divided into 2 parts and cf without a spine at end of abdomen. This is a larger group than the Methochinae and somewhat more common. Larvae are parasites of various bees and wasps.

SCOLIID WASP (p. 344)

Methochinae

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