192 AMERICAN HYMENOPTERA. 



Variety a. — %. — Head. — With a transverse smooth almost impunctate space 

 behind the posterior ocelli, a smooth impressed transverse band anterior to the 

 anterior ocellus divided longitudinally by a raised line, otherwise the tegument 

 is more or less closely punctured ; clypens convex, with almost adjoining punc- 

 tures and a smooth depressed anterior margin. 



T/iorrta;.— Dorsulum punctured all over, the anterior half dull, and with adjoin- 

 ing punctures, the posterior half shiuing and with many of the punctures three 

 and five puncture widths apart: scutellum and postscuUum with adjoining or 

 nearly adjoining punctures and longitudinally impressed in the middle. 



Abdomen. — Dorsal abdominal segments more closely and finely punctured than 

 the posterior half of the dorsulum. 



Pubescence and color much the same as in the f , differing chiefly as follows : 

 Clypeus with a yellow spot each side of the middle, lateral portions of the prono- 

 tum with a yellow mark parallel with and near the superior margin, tegulae with 

 a yellow spot, scutellum with a triangular yellow mark, postscutellum yellow, a 

 median longitudinal yellow line on the metathorax, third and fourth ventral 

 abdominal segments with a yellow spot on either side, yellow spots ou the third 

 dorsal aegnient almost touching, fourth and fifth dorsal segments with yellow 

 bands anteriorly incised, sixth dorsal with an indistinct band-like yellow mark. 



Motozus coiinexus u. sp. 



In structure very like marginatus, in color and size like viridi- 

 cyaneus. 



6 mm. — Head. — Punctured almost exactly as in marginatus, the frontal excava- 

 tion smooth and to a great extent impunctate, vertex with some of the punctures 

 distinctly separated from each other by polished impunctate spaces. 



Thorax. — Pronotum with part of the anterior half with such small shallow 

 close punctures as to appear rugulose, the greater portion, however, with some- 

 what larger punctures than the vertex, the punctures being adjoining or one to 

 two puncture widths apart, mesonotum almost entirely punctured like the 

 coarsely punctured portion of the pronotum; scutellum reticulated, the meshes 

 deeper than the punctures on the mesonotum and about three times as large; 

 postscutellum somewhat more coarsely tessellate than the scutellum, the meshes 

 deeper, the processes viewed from the side forming a right angle with the poste- 

 rior aspect of metanotum, rounded at apex and like a finger iu outline; meta- 

 thorax rather reticulate like the postscutellum. 



^ftdomen.— Punctures of the first dorsal segment a little smaller than the punc- 

 tures on the vertex and separated from each other by one to two puncture widths of 

 shining space; the second dorsal segment punctured much the same as the first; 

 apical dorsal segment with adjoining punctures about as large, but not so dis- 

 tinct as the punctures on the second dorsal segment ; the truncature of the apical 

 abdominal segment reniform bounded by a raised line and about twice as wide 

 as long antero-posteriorly. 



Type. — University of Kansas^. 



Type locality. — Clark Co., 1962 ft., Kansas. 



One specimen taken by F. H, Snow. 



