SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 69 



gently curved. Four specimens, Connecticut, New Hampshire, Wyom- 

 ing. 



Variety lapponicus. Third longitudinal vein deeply curved, the sub- 

 marginal cell hence much broader in the middle part than beyond. Fif- 

 teen specimens, Connecticut, New Hampshire, California, Oregon, Colo- 

 rado, Virginia. 



Variety lapponicus^ subvar. hipunctatus Girschner. This form occurs 

 in America (= Syrphus A Icidice Walker). May it not be due to the effects 

 of drying! 



Tlie differences^ other than in the third vein, are inconstant, and seem 

 to occur equally among specimens from all parts of the country. That 

 this difference alone is a sufficient specific character is to me doubtful; 

 hence I have here considered it a secondary or varietal character, and 

 have for that reason chosen the older name for the species. Schiner 

 considered S. lapponicus a synonym of S. arcuatus. Of the identity of 

 our species with the European there can be no doubt; specimens sent 

 by Baron Osten Sacken were compared by Dr. Loew. 



From the female of Eupeodes volucris, which may be easily confounded 

 with lapponicus, the difference in the length of the fifth abdominal seg- 

 meui will at once distinguish it. 



" tSyrphus arcucinctus Walker, List, etc. (Hudson's Bay Territory), is 

 represented in the British Museum by two specimens, one of which is 

 my S. aviaJopis; the other belongs to the group of S. lapponicus. The 

 description is drawn from the latter specimen, the abdominal spots of 

 S. amalopis being much more than 'slightly curved.'" — O. S., Cat. Dipt., 

 245. 



Syrphus amalopis. 



Syrphus amaUpis Osten Sacken, Proc. Boston Soc. Nat. Hist., xviii, 148, 1875. 



Habitat. — White Mountains, New Hampshire (O. S.), Connecticut, 

 New Mexico ! 



"5,2. 10 to ll'"'". '' Male. Eyes pubescent; face of a dingy brownish 

 yellow, with a broad brown stripe in the middle (its breadth is equal to 

 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 ; tbe latter 

 dull yellowish brown, with metallic reflections, beset with black ])ile, 

 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, posterior margin ; all 

 the yellow ])arts are straw colored. Legs black, tip of femora and base 

 of tibifc yellowish brown, the extent of this brown being much less on 

 the hind pair. Wings distinctly infuscated. 



