240 CHARLES W. JOHNSON. 



onto the lateral posterior margin ; fifth with narrow lateral margins, and a central 

 triangle attenuated anteriorly, but not quite reaching the anterior margin ; venter 

 black ; segments with yellow posterior margins, widest on the second segment, 

 where the black consists of two large sjjots along the anterior margin. Femora 

 black, outer half of the anterior and middle, and a medial band on the posterior 

 tibife brownish black : tip of the femora, basal half of the anterior and middle 

 tihije, posterior tibise and all the tarsi yellowish. Wings brown, liyaline ; veins 

 reddish. 



9. — Face, front, vertex and upper j)ortion of the occiput, black; face with 

 whitish tomentnm ; facial orbits, a small subcordate spot below the ocelli, and the 

 lower portioTis of the occiput, greenish yellow. Thorax black, with yellowish 

 tomentum : scutellum black; apical margin and species yellow. Abdominal 

 markings the same as the male, except that the markings on the side of the second 

 segment are more quadrate. 



Burlington, Iowa (Dr. H. G. Griffith) ; Algonquin, 111., June 8- 

 19 (Dr. Nason) ; Douglas County, Kansas, June (Univ. Ivans.); 

 War Bonnet Canyon and Lincoln, Neb. (Uniy. Neb.}. 



Slratioinyia discaliN Loew (PI. iii, tigs. 27, 28). 

 SIratiomi/ia dicatlis Loew, Centur. vi, 14. 



Length '^ 9 ^^ "i'"- ^ • — Fa<'e, frontal and vertical triangle black ; pile long, 

 yellowish. Antennae black. Thorax black, with long, dense, yellowish pile; 

 scutellum black, with long pile; apical margin and spine yellow. Abdomen 

 black, shining : thick and very convex ; pile on the first, .second and fifth seg- 

 ments yellowish ; on the third and fourth black ; a small spot at the posterior 

 angles of the first, a large quadrate marking on the sides of the second ; a trian- 

 gular mark at the anterior angles of the third, and a dorsal line on the fifth, yel- 

 low ; fii-st, fourth and fifth ventral segments black, with narrow lateral and pos- 

 terior margins ; second and third yellow, with a narrow posterior margin of black 

 on the second, and two l)lack spots on the posterior margin of the third ; \n\e on 

 the entire ventral surface yellow. Femora and tibise black, or brownish black ; 

 tip of the femora, basal third of the tibiae, yellowish ; basal half of the posterior 

 femora aud the tarsi brownish. Wings brown, hyaline. 



9 . — Face, front, vertex and occiput black ; face with thick yellowish j)ubes- 

 cence, sparse on the front and vertex ; facial orbits and a small cordate spot 

 below the ocelli yellow. Antennae black, proboscis brownish. Thorax black, 

 with a dense yellowish tomentum ; scutellum black, apex and spines yellow. 

 Abdomen black, shining, with a very short whitish pubescence; a subtriangular 

 mark on the sides of the second, a small triangular mark at the anterior angle of 

 the third, a very narrow lateral margin on the fourth and fifth, and a dorsal line 

 on the fifth, yellow ; venter same as the male ; posterior tibiae, tarsi (except the 

 tips) and basal half of the femora, yellow. 



Provo, Utah (AVickhani); West Point, Neb., May (Alclrich) ; 

 Minne.sota (Uniy. Kans.) ; Algonquin, 111. (Dr. Nason); Pennsyl- 

 yania (Philip Nell) ; Agricultural College, Michigan (Lowe) ; West 

 Virginia and Massachusetts, June (Riley) ; Spanish Peak, Col. 

 (Museum Comparative Zoology). 



