ART. 1 AMERICAN WASPS OF THE GENUS SCELIPHRON PORTER 17 



Wings: Transparent with a fuscous tinge; outer margins infus- 

 cated; veins fuscous; wings often with a slight violet or purple 

 reflection. 



Male. — Differs from female as follows : Anterior margin of clypeus 

 nearly straight ; anterior tibiae usually with an elongate yellow spot ; 

 middle tibiae often with a very small yellow spot; tarsal claws 

 without a tooth. 



Genitalia: Uncus slender, tips bent at right angles to main axis; 

 volsellae broad (pi. 4, figs. 21 and 22). 



Length. — Female, 19 mm. to 22 mm. ; male, 17 mm. to 19 mm. 



Habitat. — Isle of Pines, Haiti, and Cuba. 



Types. — The location of Lepeletier's type is unknown. The type 

 of Cresson's argentifrons is in the collection of the Entomological 

 Society of Philadelphia. 



Kohl appeared to be in doubt whether fasciatuin and argentifrotis 

 were the same and chose to use the latter name. In both original 

 descriptions the tegulae and all legs were noted as being entirely 

 black. These characters constitute a departure from the usual con- 

 dition among American species of Sceliphron. The writer has seen 

 only one form in which these characters occur, and it seems evident 

 that there is only one species involved. 



SCELIPHRON JAMICENSIS (Fabridus) 



Sphex jamaicensis Fabricius, 1775, Syst. Entom., p. 347, no. 10. 



Pelopoeus jamaicensis Fabricius, 1804, Syst. Piez., p. 204, no. 6. 



Pelopoeus annulatns Cresson, 1865, Proc. Eut., Soc. Philadelphia, vol. 4, p. 



135, female, male. 

 Pelopoeus vindex, var. annulatns Cresson, Saussure, 1867, Reise d. Novara 



Zool., vol. 2, pt. 1, Hymen., p. 32, female. 



Black or fuscous and yellow, posterior margins of all segments 

 yellow, pubescence and hairs yellow. 



Femdle. — Head: Frons slightly depressed; insertion of antennae 

 slightly elevated; upper part of clypeus somewhat convex; clypeus 

 biiobed or bidentate at apex, the lobes rounded, frons except above 

 antennae and clypeus covered with a dense golden pubescence and 

 numerous erect golden hairs; antennae slender, filiform, the seg- 

 ments having the following relative lengths: 1/20, 2/5, 3/25, 4/20, 

 5/17, 6/14, 7/11, 8/10, 9/10, 10/9, 11/8, 12/9; scape yellow, bulb 

 fuscous; second segment fuscous above, yellow below; third seg- 

 ment yellow basally below and at tip, rest fuscous ; fourth and fifth 

 segments sometimes with a little yellow at tip; rest of antenna 

 black, very minutely sericeous; mandibles very dark ferruginous to 

 f ucous, slightly hairy toward the base ; frons above antennae, vertex, 



