360 Annals Entomological Society of America [Vol. X, 



The color differences between this species and spinipes 

 are striking, and as far as the writer has observed, there is no 

 tendency for the markings to intergrade. This wasp was first 

 described by Saussure, although he later regarded it as a color 

 variety of spinipes. While the writer might hesitate to establish 

 a new species based on characters of punctation and color with 

 a small series, yet since the species has been named it would 

 seem preferable to preserve the name until the characters upon 

 which it is based are shown to be unstable. 



Zethus substrictus Haldeman. 



Zethus substrictus Haldeman, S. S., Proc. Phila. Acad. Nat. Sci., vol. 2, 1844, 

 p. 54. — vSaussurc, Henri de, Etud. fam. Vespid., vol. 3, 1854, p. 152. 



Zethus spinipes var. substrictus, Saussure, Henri de, Smithson. Misccl. Coll., 

 No. 254, 1875, p. 30. 



Female. — Length, Kko mm.; wing, 13.75 mm. Differs from spinipes 

 as follows: Mesonotum with median carina more distinct, area just 

 within tegtilae distinctly defined by a depressed line, impunctate; petiole 

 two-thirds as wide as long, sublinear at basal end and then rapidly 

 inflated, greatest width nearer base than apex, apical cordon distinct 

 with only one depression before it, punctations less distinct; second 

 segment of the gaster longer after the subpetiole. Black; no spots on 

 the elypeus and metanotum ; a line on either side of the anterior margin 

 of the prothorax instead of an indistinct mark, a spot on either side 

 below the tegulje, a spot on either side of the furrow of the propodeum, 

 yellow; antennas beyond the scape and all of legs, brownish. 



Male. — Length, 13.75 mm. ; wing, 10.5 mm. Differs from the female 

 as follows: Basal line of the elypeus wider and more nearly truncate, 

 surface punctate and not strigose, petiole more slender. Black; apical 

 half of elypeus, anterior aspect of the scape of the antennae, apical 

 margin of the third segment of the gaster, yellow; antennae, gaster and 

 tegulse, brownish; no spot on the anterior margin of the prothorax, 

 below tegulse, nor on propodeum. 



Distribution. — Pennsylvania and Long Island, New York. 



Neotype. — Determined by the writer, in the U. S. National 



Museum. 



Zethus poeyi Saussure. 



Zethus poeyi Saussure, Henri de. Rev. and Mag. Zool., vol. 9, 1857, p. 270; 

 Smithson. Miscel. Coll., No. 254, 1875, p. 45-47. 



Distribution. — Cuba. (Saussure). The National Museum 

 has three specimens from Tavenier, Largo Key, Fla., collected 

 by Frederick Knab. 



Type. — Probably in the Museum of Geneva, Switzerland. 



Zethus slossonae Fox. 

 Zethus slossonce Fox, W. J., Ent. News, vol. 2, 1892, p. 29-30. 



Distribution.- — Punta Gorda, De Soto Co., (Fox), Jackson- 

 ville, Duval Co., Miami, Dade Co., Fla. 



Type.—Csii. No. 1855, U. S. "National Museum. 



