464 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



the greatest width, sharply truncate posteriorly, punctured similar 

 to the head; first segment much narrower than the second; second 

 segment large, much higher than the first, subtruncate anteriorly, 

 punctures large, not confluent; carina of the first ventral large, 

 triangular, apex rounded; second ventral with large, distinct punc- 

 tures; pygidium not strongly defined laterally, truncate apically sur- 

 face coriaceous. Black; head, thorax and abdomen (except where 

 mentioned) with long matted scarlet pubescence; cheeks, clypeus, 

 scape, sides and venter of thorax, venter of abdomen and legs with 

 white pubescence; first dorsal, a triangular spot at basal and apical 

 middle of second dorsal segment with black pubescence. 



Federal District of Mexico. One female from Prof. Guillermo 

 Gandara. 



Type.— Csit. No. 14175, U.S.N.M. 



Superfamily SPHECOIDEA. 



Family AMPULICID.E. 



Genus RHINOPSIS \Vestwood. 



RmNOPSIS CANICULATUS (Say). 



Ampulex caniculata Say, West. Quart. Rep. Cincinnati, vol. 2, 1823, p. 76. 

 Rhinopsis abbottiiV^^ESTWooD, Arcan. Eiit., vol. 2, 1844, p. 68. 

 Ampulex pennsylvanicus Haldeman, Proc. Acad. Nat. Sci. Phila., vol. 4, 1849, 

 p. 203. 



A proxytype (Rohwer) in the Museum collection, and figured on 

 plate 6, figure 2, Howard's Insect Book, 1904, agrees with the original 

 description accompanying the above three names. The synonymy 

 established by Cresson is again confirmed. 



Male. — Length, 6 mm. Not as strongly sculptured as the female 

 and the basal part of the wings without a fuscous area. Clypeus with 

 a single apical tooth. 



RHINOPSIS MELANOGNATHUS, new species. 



Separated from caniculatus by the following : 



Clypeus not carinate apically, apical middle margin quinquedentate, the 

 sides of the production sinuate; mandibles ruf o-f erruginous ; head 

 uniformly sculptured; pronotum finely transversely striato-granular 

 posteriorly; mesoscutum without large lateral punctures; notauli not 

 foveolate; mesoepisternum granular with a few large punctures dor- 

 sally caniculatus (Say). 



Clypeus with a carina in apical middle with one apical tooth, sides of produc- 

 tion not sinuate; mandibles, except the piceous apices, black; front striato- 

 punctate, rest of the head finely granular, with large scattered punctures; 

 pronotum coarsely, transversely striato-reticulate; notauli foveolate; sides 

 of mesoscutum with large punctures; mesoscuto-scutellar suture strongly 

 foveolate; mesoepisternum with large, dorsally confluent, punctures; 

 entirely black, wings marked as in caniculatus. Female. Length 

 10 mm melanognathus Rohwer 



