^0.3.] PATTON ON ACULEATE HYMENOPTERA. 363 



cles, line behind tubercles, the tegulte and a line above, the eosta of 

 wing, a large spot on each side of the scutellum shaped like a comma, 

 line on postsciitellum, an arcuated almost interrupted line bordeiiug the 

 upper face of the metathorax posteriorly, the tips of the femora, the 

 tibiie (exceptiug a line within, and, on the anterior ]iair, an exterior line 

 connected with the inner line posteriorly), the base of the four posterior 

 tarsi, a band occupying the posterior half of all the dorsal abdomiual 

 segments excepting the last, two spots on the last dorsal segment, and a 

 dot on each side of the second and third ventral segments at the tip, all 

 yellow. On the mandibles, collar, and tibial, the yellow is whitish, on 

 the abdomen it is pale and greenish. The tarsi are testaceous, the ter- 

 minal joint of the four posterior darker, the ciliation of the anterior pair 

 black. The wings are hyaline, with a faint smoky cloud across the 

 middle, the nervures fuscous. The bands on the abdomen are notched 

 on the disk, and all but that on the first segment are slightly sinuate on 

 each side. Clypeus elevated, its anterior margin distinctly sinuated 

 (much more so than in B.fasciaia), the anterior border of the clypeus 

 (more broadly in the middle) free from pubescence, and highly polished. 

 The marginal and third submarginal cells separated by a sinus as deep 

 as that in Monedula. Anterior tarsi dilated externally, and fringed with 

 long flattened spines. Abdomen finely punctured, the sixth segment 

 inore coarsely punctured, the sides of the sixth segment denticulated, 

 its apex with a sharj) notch. Length 11""". 



The specimens from Kansas all differ in having the wings hyaline (or 

 with the slightest trace of a cloud), the nervures paler, the metathorax 

 with a yellow stripe on each lateral angle, and the apical segment of 

 the abdomen immaculate. In one specimen, the markings have a deeper 

 yellow tint. In most of the specimens, the silvery pubescence is more 

 conspicuous, and the yellow markings are more developed. The speci- 

 men presenting the greatest ditference has the clypeus, a line on scape 

 of antennfE, most of prothorax, broad lateral margins, and two longi- 

 tudinal discal stripes (shaped like the tooth of a Dinosaur) of the 

 mesoscutum, large spot on side of mesothorax, spot above intermediate 

 coxse, scutellum except median line, upper surface of metathorax except 

 spot at base, broad lateral angles of metathorax, upper surface of the 

 first segment of abdomen except a notch on anterior middle, and broader 

 abdominal bands, yellow ; the bands of the second and third segments 

 of the abdomen with a broad rectangular notch on each side anteriorly. 



A specimen of the male from Northern Illinois (Mr. E. J. Lake) differs 

 from Say's description in the following respects : there is scarcely any 

 green tinge in tlu? yellow markings, and the bands on the abdomen are 

 entirely yellow and cover nearly the whole surface excepting the black 

 seventh segment ; the tubercles, a small transverse spot behind them, a 

 dot on the tegulse, an indistinct yellow line on each side of the meta- 

 thorax at the tip, and a small spot on each side of the second and third 

 ventral segments are yellow j the anterior tibiiE have a short black line 

 Bull. V, 3 3 



