Wings bifasciate, the distal fuscous band at apex. Legs red except the coxae, the antennae wholly concolorous. Ovipositor extruded for over half the length of the abdomen. Scutellum longitudinally lined.

Hyaline band of fore wing distinctly narrower than either fuscous band (one on each side of it); stylus a little shorter than the ovipositor.

californicum Girault

Hyaline band of fore wing somewhat broader than either fuscous stripe; stylus and ovipositor equal.

coquillettii Ashmead

Wings unifasciate or wholly embrowned or with a large unbroken, fuscous area. Wings wholly infuscated. Scutellum densely punctate like the scutum (in the first species). Propodeum with a lateral sulcus.

Ovipositor much extruded.

Legs reddish except the coxae and the first and third femora ventrad; more slender than usual, the ovipositor about as in californicum but the abdomen is longer, hence the ovipositor is so. Fore wing with a longitudinal white streak caudad of middle.

acmaeoderae Rohwer

Ovipositor extruded for less than a fourth the length of the abdomen, the stylus subobsolete.

Fore wings indefinitely slightly stained; legs reddish except the coxae; scutellum long-lineolated.

obscurum Girault

Wings infuscated from the bend of the submarginal vein to apex or nearly. Antennæ concolorous (compare obscurum).

As in californicum but the scutellum finely punctate differs from acmaeoderae in being more robust, the first and third femora are not metallic ventrad, the costal cell is broader, the tip of the fore wing is hyaline for a short distance.

alpinum Girault

Legs wholly concolorous except the knees and tips of tibiae narrowly and the tarsi; as in the preceding but stylus and ovipositor subequal.

cyaneum Ashmead

Wings hyaline or subhyaline. Antennæ concolorous except at extreme base.

Ovipositor extruded for about half the length of the abdomen, the stylus slightly short.

Middle legs except coxae, all knees narrowly, tips of tibiae and the tarsi reddish brown. Postmarginal vein subequal to the stigmal.

hubbardii Ashmead

Ovipositor extruded for less (or not more) than a third the length of the abdomen, the stylus subequal.

Postmarginal vein subequal to the stigmal.

Legs reddish except the coxae and cephalic femora and tibiae.

Scutellum somewhat more distinctly lineolated longitudinally, punctate. Ovipositor short.

hyalinipenne Ashmead

Postmarginal vein distinctly longer than the stigmal. Legs concolorous except knees, tips of tibiae and the tarsi. Stylus somewhat shorter than the ovipositor which is a third the length of the abdomen.

georgia Girault

Wings subhyaline. Antennæ with the basal fourth of the cape honey yellow.

Postmarginal vein distinctly much longer than the stigmal, twice longer. Ovipositor extruded for nearly half the length of the abdomen, the stylus a little shorter. Legs honey yellow except fore and hind coxae.

arizona Girault

All the species have the postmarginal vein shorter than the stigmal or no longer, save where noted; the parapsidal furrows are distinct, but very short, joining before the middle of the scutum from cephalad. The club is usually single, the antennae 11-jointed, tapering-filiform.