Antistrophus bicolor Gillette, 1891

Feeds on: May induce galls on Silphium integrifolium Michx. but claim is unsubstantiated

Distribution: United States: Illinois

Antistrophus bicolor

Described from one specimen from Normal IL. Type dated July 6 1884. Accession catalogue says: From Silphium integrifolium."

Antistrophus bicolor n. sp.

Gall unknown.

Gillette did not offer much information about this species. He described it from single specimen from Normal, Illinois. Bothe the host plant and gall of the wasp were unknown to him. Seventy years later, Weld reports the collection date of Gillettes's type specimen as being July, 6, 1884 and the accompanying accession catalogue as stating "from Silphium integrifolium".

Aylax bicolor (Gillette)

Antistrophus bicolor Gillette
Aulax bicolor Kieffer

Habitat. Illinois (normal).

The type of this species was sent to me for examination by Mr. C. A. Hart. In general appearance and color it is like Aulacidea bicolor, but the parapsidal grooves are different, the radial area is open at the costa, and the cubitus almost reaches the first cross-vein. The gall is not known.