86 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



Monohia it is separated also by having 4-segmented labial and 6- 

 segmented maxillary pali)i. It lacks the transverse carina on the 

 first tergite of the Ancistrocerus. O. hidens has a differently shaped 

 clypeiis, the cheeks considerably widened behind the eyes, the post- 

 sciitellum without a crenulate transverse ridge, and the concavity 

 of the propodeum separated from the dorsal areas by a more or less 

 distinct carina (forming an upper tooth divided by a notch from the 

 sides of the postscutellum). 



ODYNERUS PRATENSIS H. de Saussure 



Odynerus pratensis H. de Saussure, Rev. Mag. Zool., ser. 2, vol. 22, p. 61, 1870 

 (9 $ ; "America borealis") ; Smithsonian Misc. Coll., vol. 14, no. 254, 

 p. 292, 1875 ( 2 from Cape St. Lucas, Lower California ; $ from New 

 Mexico). 



Odynerus clusinus Cresson, Trans. Amer. Ent. Soc, vol. 4, p. 234, 1872 

 ( 2 $ ; Texas ; types collected by Belfrage, therefore probably from Bosque 

 County). 



Cresson's clusinus and de Saussure's pratensis were based upon the 

 same species, even though de Saussure's description does not mention 

 that the first and most of the second tergites are smooth and im- 

 punctate. 



The typical form of 0. 'pratensis is mostly ferruginous, with a few 

 black blotches or spots, particularly on the vertex and mesonotum, 

 and with many yellow markings, most of the tergites and sternites 

 having broad apical j'ellow margins, always widened anteriorly on 

 the first and sometimes also on the second tergite. Wings subhyaline, 

 tinged with amber-yellow and very slightly violaceous. Length 

 (h. + th. + t.l and 2) : 2 , 11.5 to 12.5 mm; $ , 8.5 to 10.5 mm; of fore 

 wing: 2 , 10.5 to 11.5 mm; S , 8.5 to 11.5. 



Specimens examined. — Texas: New Braunfels, Comal County; 

 Ozona, Crockett County; Devils River near Comstock, Val Verde 

 County; Fort Davis, Jeff Davis County; Valentine, Presidio County; 

 Fedor, Lee County, 



New Mexico : Rio Grande Canyon, south of Taos, Taos County. 



Arizona: Flagstaff, Coconino County; Post Creek Canyon near 

 Fort Grant (Pinaleno Mountains), Graham County; Congress 

 Junction, Yavapai County. 



Many females and males. 



ODYNERUS PRATENSIS BRUMALIS, new variety 



Male. — Mainly black, extensively marked with yellow and with a 

 few ferruginous blotches. Clypeus, frons to upper margin of ocular 

 sinuses (except two black oblique spots above antennal sockets), most 

 of cheeks and mandibles, under side of scape, anterior portion of 

 dorsal face of pronotum wholly or only medially, ridge of postscutel- 



