36 PROCEEDINGS OF THE NATIOISTAL MUSEUM vol.74 



Ferruginous; mouthparts, scutellum, upper division of metapleu- 

 rum and region around apophyses more or less distinctly paler; 

 antennae with an incomplete white annulus centering on seventh 

 flagellar joint, red basad of annulus, black beyond; front wing with 

 an infumate band below stigma; legs testaceous, front ones paler; 

 apex of postpetiole indefinitely paler ; seventh tergite white above. 



Male. — Sculpture less dense throughout; apical carina entirely 

 without apophj'^ses; abdomen narrow, spiracles close to margins of 

 tergites; head black and white, orbits except interruption at vertex, 

 face, clypeus, mouthparts and scape beneath white; antennae black 

 with a whitish annulus centering on flagellar joint 11, joints grad- 

 ually shorter from base, the fourth not abruptly shorter; thorax, 

 especially laterally, and legs paler; wings hyaline; abdomen, except 

 the stramineous petiole, ferruginous. 



Type-locality. — Louisiana. 



Type.—C^t. No 40590, U.S.N.M. 



Nine females and eight males as follows : Four females and three 

 males, including the type and allotype, from Louisiana (C. F. Baker 

 collection); one female, Opelousas, La., G. R. Pilate; one female. 

 Piano, Tex., October, 1907, E. S. Tucker; one male, Paris, Tex.; one 

 male, Lolita, Tex., J. D. Mitchell; one female, Victoria, Tex., April 

 11, 1911, J. D. Mitchell ; one female, San Antonio, Tex., May 4, 1905, 

 W D. Pierce (Hunter No. 112) ; one male, Alamaba (C. F. Baker 

 collection); one male, Lexington, Ky. ; one female, Raleigh, N. C, 

 April 10, 1927, C. S. Brimley ; one male, Washington, D. C, July 14, 

 1915, W. A. Donnell. 



DIAPETIMORPHA INTROITA (Cresson) (new combination) 



Figs. 3f, 6fir 



Mesostemis introUns Cresson, Trans. Amer. Ent. Soc, vol. 4, 1872, p. 162, male. 



Type.— Gat. No. 1577, U.S.N.M. 

 Mesostemis dejectus Cresson, Trans. Amer. Ent. Soc, vol. 4, 1872, p. 163, 



female. Type. — No. 1174, Acad. Nat. Sci. Phila. (new synonymy). 

 Cryptus armatus Ashmead, Proc. U. S. Nat. Mus., vol. 12, 1890, p. 411, female, 



(not Lucas). Type.- C-Ai. No. 2026, U.S.N.M. (new synonymy). 

 Cryptus ashmeadii Dalla Torre, Cat. Hym., 1901-1902, p. 562 (new synonymy). 

 Diapetimorpha armatus (Ashmead) Viereck, Proc. U. S. Nat. Mus., vol. 44, 



1913, p. 565. 



In spite of the marked color antigeny between the sexes I have no 

 doubt of the correctness of the above synonymy. 



Discussion based on the types of all names, a homotype (R. A. 

 Cushman) of dejectus and three additional specimens of each sex 



Female. — Length, 10-12 mm. 



Head behind eyes shining and sparsely punctate, otherwise mi- 

 nutely densely punctate opaque; temples convexly sloping, cheeks 



