1007] 
JOHXSOX—SOME XOia'II AMERICAX EYHEHIDAE 
with two yellow spots, those on the third hein^ usually much smaller. Legs hlaek, 
the knees and tarsi brownish, wings tinged with dark brown. Length ti 7 inm. 
In the alxioininal markings there is considerable variation. Among the eleven 
s])eeiniens eolleeted the s])ot.s on the third segment show all gradations, from equal 
in size those on the second segment, to being obsolete and in one s]>eeimen wanting. 
'I'he males have the most |)rominent markings. 
I’lfiz.v .vrsTH.vu.s n. sp. 
Pipiza pulcheUa .lohnson, Proc. aead. nat. sei. bSi(.7, p. o2!) {iwn Willi.ston) d' 9 . 
Head, thorax and alxlomen black or a veryilark bhie-blaek, .shining, covered with a 
sparse whitish pile. Antennae brownish black, length of the third joint between four 
and five times its width, under side toward the base more or less reddish. 1 ,egs bluish 
black, tips of all the femora, liasal half of the front and middle tibiae, tlu' metatarsi 
and two following joints of the tarsi yellow; basal half of the posterior metatarsi and 
the two last joints of all the tarsi black. Wings dark brown, somewhat lighter towards 
the base, last section of the fourth longitudinal vein angulatc(l in the middle. Length- 
(1 mm. 
Five specimens, St. -\ugustine, Florida, March 1.5, 1S91. d’he length of the 
third antennal joint and venation induced me from the deseri])tion, to refer it to P. 
pulr.heUa in iny pa]>er on the Diptera of Florida. Since that time 1 have eolleeted 
a number of the true pulrhella and the distinctness of the two is very apparent. Its 
longer third antennal joint, dark brown wings and very dark blue-black body are 
the ])rineipal distinguishing features. 
The genus is characteristic of the transition and boreal zones, this being the 
only species recorded from the lower austral. 
Chuysotoxum ventkicosum Loew, Centur., V, 44, 1804. 
Owing to a mistake in the habitat, there seems to be considerable confusion 
regarding this ,s|X‘eies. The two types are marked “W. T.,” the original description 
gives “Washington.” < )sten .Saeken, Catalogue, 1S7S, gives “Distr. Columbia,” 
as does 1 >r. Willi.ston in his Syuo])sis of the Syr])hidae, p. 1.5 “District of Columbia 
(Lw.), Canada.” The original description also calls for an inverted Y and not a V 
shaped marking on the fifth .segment. It might be referred to either, it is really a 
very broad V with a short stem. 'Phe seutellum of the ty])cs shows faintly the dark 
translucent disc so characteristic of all the species and cannot be called entirely yellow, 
