234 CIIARLKS AV. JOHNSON. 



fifrh yoUow : viMitcr jircoiiish yollow; liase of tlie fourth and fifth si'iriuents imr- 

 rowiy marked witli l>ro\viiish l)hick. Legs reddish ; coxa' and a wide iircajiical 

 band on tlie femora black. Winjis hyaline, veins yellow. 



9. — Face, front and occipnt yellow, shininj;; vertex, a transverse marking in 

 the fovea above the base of the antennse, and oral margin, brown. Thorax with 

 short golden tomeiitum ; pleurtB, posterior angles and the base of the scutelluni, 

 brownish ; in one spe(;inien the entire scutelluni is reddish, but this is evidently 

 a discoloration. The markings on the lateral i)osterior margin of the fourth seg- 

 ment are subtriangular. and almost connected at the posterior margin ; on the 

 fifth there is only a narrow anterior margin of black ; all the abdominal mark- 

 ings are widely connected at the lateral margin ; venter wholly greenish yellow. 

 Legs of a uniform reddish color; coxiP brownish black. 



Three 8])eciinens, Custer, S. D. (Uinv. Nebraska). 



Stratioiii.via lalieeps Loew (PI. iii, fig. 9). 

 Strdtioiiii/iii Ititiirps Loew, Centur. vii, 20. 

 f Stratiomj/.s ni/mpha Walker, List, iii, etc., .530. 



Length % J 11 12 mm. %. — Face and frontal triangle l)lack. with white pile ; 

 facial and occi])ital orbits yellow. Antennse black and noticeal)ly shorter in this 

 species than in any of the others. Thorax black, clothed with a thick, yellowish 

 white pile ; scutelluni and spines yellow, base black. Abdomen black, marked 

 at the posterior angles of the second, third and fourth segments by a subtrian- 

 gular sjjot of yellow, those on the fourth narrowly connected ; fifth with a narrow 

 lateral margin and a central posterior triangle of yellow ; ventral segments yel- 

 low, with a basal band of black, interrupted on the second and tliird ; the third 

 also having two small brown central spots. Femora black, tips of the femora, the 

 tibiffi and tarsi, yellow; til)i;e with a medial band of brown. Wings hyaline, 

 veins red. 



9. — Face, front and occipnt yellow, shining; pile white; vertex, a sj)ot above 

 the l>ase of the autennte, medial facial line and oral margins black. Legs in one 

 specimen totally yellow ; femora slightly darker. The black band on the tliird 

 ventral segment continuous in'oneand interrupted in the other; lateral marking 

 on the fourth segment not (HJiinected. 



Two specimens ( ^ 9 ), Montana (Coquillett) ; one 9 , Utah (Al- 

 drich); Ogden, Utah, June 20 (collection C. V. Riley, U. S. Nat. 

 Mus.) ; Reno, Nevada (Wickham). 



The type of S. laiieeps is somewhat larger (14 mm.). The follow- 

 ing notes are from specimens in the Museum of Comp. Zoology : 



9 . — Femora varying from reddish brown to black ; %, — the pos- 

 terior margin of the fbiu'th segment narrowly interrupted, and the 

 base of the scutellntn widely black. Weber Lake, Cal., July 22 

 (Osten Sacken); The Dalles Oreg. June 28, Yakina River, Ellens- 

 burg, Wash., July 8 (Dr. Hagen) ; Twin Lake, Col. (Osten Sacken). 

 The later Baron Osten Sacken referred to S. ni/nijihis Walker. That 

 this is Walker's species seems quite evident, but a study of the type 

 is necessary. 



