Osten Sacken.] 148 [October 6, 



part of the face somewhat projecting, the front of the female com- 

 paratively broad, the first joint of the hind tarsi of the male dis- 

 tinctly swollen. The general appearance of this species is different 

 from an ordinary Syrphus; nevertheless the absence of any striking 

 characters to take hold of renders the species difficult to describe. 



7. S. amalopis n. sp. 



Male. Eyes pubescent; face of a dingy brownish yellow, with a 

 broad brown stripe in the middle (its breadth is equal to one-half of 

 its length, or more) ; cheeks black, with a greenish reflection ; a 

 black, broad, oral border; antennae black, front and vertex likewise; 

 facial tubercle salient. Thorax dark metallic green, clothed with 

 black pile, mixed with fulvous on the sides "and near the scutellum; 

 the latter dull yellowish broAvn, with metallic reflections, beset with 

 black pile, and with a blackish border and corners. Abdomen black, 

 very little shining, on the second segment two oblong yellow spots ; 

 on the third and fourth segments a pair of lunate spots, club-shaped 

 on the inner end, truncate on the outer, and considerably excised in 

 the middle; the fourth and fifth segments with a narrow, yellow, pos- 

 terior margin; all the yellow parts are straw-colored. Legs black, 

 tip of femora and base of tibiae yellowish brown ; the extent of this 

 brown being much less on the last pair. Wings distinctly infuscated. 



Female. Front and vertex metallic greenish black; spots on sec- 

 ond segment coarctate in the middle, those on segments three and 

 four dissolved in two, so that these two segments show each a trans- 

 verse row of yellow spots, nearly of the same size and equidistant ; 

 the fifth segment has two spots at the base ; the wings are hyaline. 

 In all other respects like the male. 



Length, d", ?, 10-10.5 mm. 



Hob. White Mountains (Gorham, N. H.). Two males and one 

 female, taken by Mr. E. P. Austin and Mr. G. Dimmock. 



I have not the slightest doubt that these males and females belong 

 too-ether ; the difference in the coloring of the wings has no import- 

 ance; as to that in the coloring of the abdomen, I should not wonder 

 if this species proved to be very variable in this respect, and if in- 

 termediate stages occurred between that where the lunate spots are 

 entire, and where they are dissolved in two. The abdomen in this 

 species is more convex, broader and somewhat shorter than that of 

 S. lapponicus. 



In the specimens described above, the yellow abdominal markings 

 do not come in contact with the lateral margin. But I have a pair of 

 specimens (cf, ?) from the same locality in which this contact occurs. 



