SYNOPSIS OF NORTH AMERICAN SYRPHID^. 75 



arated, and have a slender anterior prolongation'that reaches quite to 

 the lateral margin ; the second and third ])airs are less widely sepa- 

 rated and the outer ends are distinctly cut off from the lateral margins; 

 the spots are on the front part of the segments, moderately broad, their 

 inner ends nearly touching the front margin of the segments; they are 

 very slightly oblique in position, gently concave in front and convex 

 behind, their outer posterior parts rounded ; fifth segment with a nar- 

 row hind margin narrowly interrupted, and coalescent on the sides 

 with the yellow of the next segment in front ; the fifth segment also 

 with a slender yellow hind border. Legs black ; distal half of front 

 and middle femora, tip of liind femora, broad base of all the tibite and 

 tips of four front tibiae, yellow. Wings hyaline ; stigma light yellow. 

 One specimen (H. K. Morrison). 



Syrphiis lotus, n. sp. 



Habitat. — Arizona ! 



9 . Length, 10'^'^'. Eyes pilose. Face and cheeks yellow, the former, 

 in the single sjiecimen, of a strong green tint : a facial strij^c, not reach- 

 ing the antennae, brown. Front black, grayish-yellowish dusted across 

 the middle, leaving a large oval spot below, and the vertex, black. An- 

 tenna brown, the third joint below near the base reddish. Pile of front 

 whollyblack, of the occiput light yeMow. Dorsum of thorax deej) green, in 

 front with two grayish pollinose strii)es. S('ntellum subtranslucent ob- 

 scure yellow, the i)ile chiefly black. Abdomen but little shining, black ; 

 the bands all distinctly sei)arated by a black interval from the lateral 

 margins; first cross-band interru[)ted by a small interval; second and 

 third bands bilaterally oblique, cut off squarely at the ends, and touching 

 the front bolder for a considerable distance in the middle; on each side 

 in front a little concave, on the sides behind nearly straight, or gently 

 convex, the two sides forming a very shallow inverted V ; posterior 

 margin of the fourth segment, a spot on the anterior angle of the fifth, 

 and a slender hind margin, yellow. Legs yellow, base of all the femora 

 black. Wings hyaline, stigma brownish. 



One specimen, Arizona (H. K. Morrison). 



Another female s[)ecimen from New Mexico (Geo. F. Ganmer) is per- 

 haps allied to this. The facial stripe is black, and there is a black 

 stripe on the cheeks; the second and third abdominal cross-bands are 

 more oblique, and strongly concave in front, and the second is nar- 

 rowly interrupted in the middle; they are both more convex behind, 

 and the form more deeply V-shaped. The hind femora are black on 

 nearly their whole length; the hind tibiae have a black ring, and the 

 hind tarsi, except the base, are also black. From awjo/o/^sjs, with which 

 it may be confounded when the spots are separated, it seems to be dis- 

 tinct in its larger size, more oblique spots (all of which are distinctly 

 separated from the lateral margins), lighter-colored scutellum, etc. 



