NORTH AMERICAN DIPTERA. 



233 



Stratiomyia lativeutris Loew (PI. iii, figs. 5, G). 



Stratioiiiiiia Intiventris Loew, Centur. vi, 8. 



Startiomi/ia ohesa Loew, Centur. vi. 11. 

 Length % ? 13 mm. % .—Face and occiput yellow, pile yellow ; a wide facial 

 line, frontal triangle and mouth black. Antennse black. Thorax black, with 

 yellowish pile ; scutellum and spine yellow, base black. Abdomen black ; second, 

 third and fourth segments with an elongated yellow spot at the lateral posterior 

 margin, those on the fourth segment usually connected, forming a posterior mar- 

 gin ; also a small spot at the anterior angle of the third, fourth and fifth seg- 

 ments ; fifth with a narrow lateral margin and a dorsal line of yellow ; venter 

 yellow', segments with an irregular band of black at the anterior margins. Femora 

 brownish, with a preapical band of black ; tips of the femora, the tibiae, and tarsi 

 yellow: tibis with a medial band of brown. Wings hyaline, brownish, somewhat 

 lighter towards the end, veins reddish. 



9 —Face, front and occiput, yellow ; vertex black, with two yellow spots on 

 the vertical angle , in some specimens the black of the vertex extends along the 

 frontal orbits and connects with a narrow transverse line that extends from the 

 base of the autennse ; frontal fovea, mouth and a narrow facial line extending 

 from the base of the antennae to the mouth black ; black at the base of the scu- 

 tellum narrower than in the male. The abdominal markings are more promi- 

 nent than the male, those on the third sometimes connected, thus forming a pos- 

 terior margin to both the third and fourth segments; there is a prominent spot at 

 the anterior angle of the second, third and fourth segments, on the fifth the spots 

 at the anterior angles are sometimes connected with the dorsal line, leaving two 

 triangular spots and a narrow anterior margin of black. Legs yellow; femora 

 with a broad preapical band of brownish black. 



Toronto, Ont., June 17, July 12 (Wm. Brodie) ; Buffalo, N. Y. 

 (Kansas Univ.) ; Northumberland County, Pennsylvania (H. G. 

 Klao-es); Ao-ricultural College, Michigan (Davis); Champaign 

 County, Illinois (W. A. Snow) ; Algonquin, 111. (Dr. Nason) ; Brook- 

 ings, S. D. (Aldrich). 



In the type ( 9 ) the abdominal markings are intermediate between 

 the % and 9 figured, the markings on the second segment are more 

 triangtdar, those at the anterior angles wanting, while the fifth seg- 

 ment is like that of the % . In the nine specimens before me there 

 is a great variation in the abdominal markings. 



Stralioniyia Briineri n. sp. (PI. iii. figs. 7, 8). 



Length -J, 9 13 mm. % .—Face yellowish ; frontal triangle, a wide medial 

 line cheeks and oral margins black, with yellow pile; black of the frontal tri- 

 an<rle extending slightly downward along the facial orbits: occiput narrowly 

 nia"-ined with yellow. " AntenntE black ; first joint noticeable shorter than in 

 most of the species. Thorax black, with long yellow pile ; scutellum and spines 

 yellow base black. Abdomen black ; a small lateral quadrate spot on the first, 

 triangular markings on the second and third laterally connected ; a transverse 

 spot on the lateral posterior margin of the fourth, and the posterior halt of the 



TRANS. AM. ENT. SOC. XXII. 



(30) JULY, 1895. 



