50 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 74 



ruginous, frequently more or less stained with black ventrally and 

 apically. 



Except for the lack of black bands on the abdomen the male is very 

 similar in color to Mesostenus leucopus Ashmead. 



The type of rriacUentus is from Louisiana, that of longic(mdus 

 from Texas, that of gracilipes from California, that of texanus from 

 Texas (paratype from South Carolina), and that of exclamans from 

 Kansas. The additional specimens in the National collection are 

 as follows: New Jersey — Bridgeton, July 16, 1924, L. A. Steams, 

 one female. Maryland — Dorchester County, October 2, two females; 

 Marshall Hall, August 29, one male. District of Columbia — one 

 female. Virginia — Falls Church, September 2, 1918, E,. A. Cush- 

 man, six males; Leesburg, September 26, 1918, G. W. Underhill, 

 one female. Ohio — no locality, C. H. Kennedy, one female; Co- 

 lumbus, July 21, 1920, A. E. Miller. Kansas — Kiley County, May 

 22, F. Marlatt, one female. Colorado — no locality, C. F. Baker 

 collection, one female, six males; Rocky Ford, April 16-24, 1921, 

 reared but host not given, C. E. Mickel, one female, two males. 

 Texas — Paris, October 7, 1904, A. A. Girault, one female; Chilli- 

 cothe, August 17, 1909, T. D. Urbahns, two females; Cotulla, May 12, 

 1906, J. C. Crawford, one female, April 17, 1906, F. C. Pratt, one 

 male ; Victoria, April 6 and July 11-28, J. D. Mitchell, four females, 

 two males; Corpus Christi, one male; Brownsville, July 6, one 

 female. New Mexico — ^Las Cruces, T. D. A. Cockerell, three males. 



Genus POLYCYRTUS Spinola 



Polycyi-tus Spinola, Ann. Soc. Ent. France, vol. 9, 1840, p. 154. Genotype. — 



Polycyrtus histrio Spinola. 

 PolycyrtimorpJia Viereck, Proc. U. S. Nat. Mus., vol. 46, 1913, p. 383. GetU)- 



type. — PolycyrtimorpJia amocnus "Viereck. 



The single character on which Viereck founded his Polycyrtimor- 

 pka (the occipital carina joining the hypostomal carina) is ap- 

 parently not of generic value. At the point where the occipital 

 carina bends toward the hypostomal carina it varies greatly in height, 

 increase in height being accompanied by reduction in strength 

 toward the hypostomial carina sometimes to the point of virtual 

 disappearance. 



Head broadly transverse, temples sharply receding ; occipital carina 

 frequently very high, frequently very prominently angled below and 

 not reaching hypostomal carina, latter high and flangelike ; eyes more 

 or less convergent below; frons with a stout median horn; clypeus 

 very strongly elevated, apically inflexed and with a narrow reflexed 

 margin; malar sjjace long; upper tooth of mandible more or less 

 distinctly longer than lower tooth; antennae long, slender, in female 



