SYNOPSIS OF NOKTH AMERICAN SYRPHID^. 29 



Pipiza pistica, u.sp. 



Habitat. — Couuecticut ! 



9 . Length, 7.5™"". Antennae black, the third joint yellow along the 

 lower side; in shape oblong, more than twice as long as wide. Face 

 wholly white pilose. Front black pilose below and abo^e, across the 

 middle white pilose. Eyes whitish pilose, but variable in different 

 reflections, appearing blackish. Pile on the orbits behind white. 

 Thorax, as the head and abdomen, shining metallic black, with a light 

 greenish reflection, moderately long, white pilose. Abdomen white 

 pilose, except on the posterior margins of the second and third seg- 

 ments, where it is very briefly black pilose. Legs black, white pilose, 

 the tip of all the femora, the rather broad base of the four front tibiae, 

 and the immediate base of the hind tibiee, the tip of four front tibiae, 

 and the basal joints of their tarsi, yellow, the last two joints of the 

 four front tarsi blackish ; hind metatarsi very distinctly thickened. 

 Wings hyaline, the stigma light yellow. 



Two specimens, June 10, New Haven. 



Pipiza pisticoides, ii.si>. 



Habitat — White Mountains ! 



9 . Length, G"""". A single si>ecimeu taken near the base of Mount 

 Washington, August 1, resembles P. pistica very much, but seems evi- 

 dently diffexeut. The third joint of the antennae is orbicular, as broad 

 as long; the pile throughout is shorter, on the abdomen scarcely dis- 

 cernible ; the size is also distinctly smaller. 



Pipiza (Pipizella) pulchella, n. sp. (Plate II, figs. 1, la, lb.) 



Habitat. — Connecticut, Massachusetts ! 



9 . Length, o.S""™. Shining, greenish black, clothed with not very 

 abundant nor long, nearly white pile. Front and face wholly white 

 pilose, the former with a small triangular spot near each orbit, the lat- 

 ter with a narrow orbital margin, white pollinose. Post orbital cilia 

 white; the short pile of the eyes dark. Face gently convex near the 

 middle. Anteunte elongate, but shorter than the face ; the third joint 

 three or four times as long as wide, black, the third joint yellowish on 

 the lower basal part. Scutellum with a slender deep groove before its 

 margin. Abdomen very short pilose, on the posterior part of the second 

 and third segments black, elsewhere nearly white. Legs black, white 

 pilose; tip of all the femora, base and immediate tip of anterior tibiae, 

 base of hind tibiae, first two joints of anterior, and the middle two of 

 hind tarsi, yellow; hind metatarsi considerably thickened. Wings 

 grayish hyaline; last section of fourth vein angulated in the middle, 

 posterior cross-vein rectangular; stigma luteons. 



Two specimens, Connecticut, Massachusetts. The convexity of the 

 face is not so strong in one specimen as is figured. 



ADDITIONAL, NORTH AMERICAN SPECIES. 

 Pipiza divisa Walker, Trans. Ent. Soc, N. Ser., iv, 156. — Vera Cruz. 



