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KAHL: NEW SPECIES OF SYRPHIDA. 145 
Ceria signifera Loew. Female. Ceria Willistoni. n. sp. Female. 
Antenne—‘‘das ate Fihler- Second antennal joint scarcely 
glied fast noch einmal so lang more than half as long as the 
als das Tic) Ue a third. 
Scutellum—*‘*Schildchen ganz Scutellum reddish brown or 
Selb; sein Rand an den Seiten yellow, the base and lateral 
Tostbraunlich.” angles black, the posterior mar- 
gin narrowly brown. 
Abdomen—**ster Ring gelb- Fifth abdominal segment 
braun, an der Wurzel, auf der wholly black, nowhere pollinose, 
Mittellinie und an der Spitze the sparse pubescence in no way 
Schwarz, iiberall mit gelber concealing the ground color. 
Bestaubung bedeckt, welche die 
Grundfarbe schwer erkennen 
lasst.” 
The brown of the wing—‘*am The brown of the wing reaches 
dunkelsten in der Nahe der 3ten the spurious vein in the first 
Lingsader, iiber welche sie nir- basal cell and borders the last 
Sends erheblich hinausreicht.” section of third vein posteriorly 
rather broadly, except a short 
distance before the short vein 
that projects into first posterior 
cell. 
Chat there is a typographical error in Loew’s statements, ‘‘ Long. 
Corp. 3%” (p. 18, diagn.) for Long. corp. 5% as suspected by 
Giglio-Tos and «die 3te Langsader gelblich,” etc., (p. 19, below) 
for die 5te Liangsader gelblich, etc., I judge from the fact that 
Loew, when pointing out the most conspicuous differences between 
C. arietis male and C. signifera female (p. 18), mentions neither 
the striking differences in the proportion between length of body 
and wing of the two so closely allied species, nor any difference in 
the color of and about the 5th (that is,‘‘vorletzte”’) or 3d vein; 
he does not mention the fifth (<¢vorletzte”) vein in the description 
of signifera, but does in that of arietis. If those differences actu- 
ally existed, he would certainly have paid some attention to them. 
; Tt may not be without importance to here point out that Loew 
In his descriptions of Ceréa arietis (p. 18) and Certa signifera (p. 
19) writes regarding the antenna, the former ‘‘zweites Glied fast 
noch einmal so lang als das 3te,” the latter ‘‘das 2te Fihlerglied 
f 
he noch einmal so lang als das 3te;” and on p. 18 below he says, 
t ; = oF 
lat the two would be considered the different sexes of the same 
Pecies, but there are differences that cannot be considered sexual, 
