145 
Variations in Uropoda. By A. D. Michael. 
error. He also identifies it with JVotaspis marginatus and N. im- 
marginatus of Koch ; this, 1 think, is also a mistake ; but he identifies 
it with Uropoda seutata Megnin-Haller, which is correct, and also 
with Kramer’s species of the same name, which is more doubtful. 
In his last-named work * he describes a different species as ovalis. 
In 1885 Canestrini | follows Berlese. 
The result of all this is that the synonymy is as follows : — 
The species with the abdomen nearly pointed posteriorly, and 
which I refer to, is 
JJropoda ovalis of Koch, but not of Kramer, Canestrini, nor 
Berlese. 
JJropoda scidata of Megnin and Haller, but probably not of 
Kramer. 
JJropoda ohscura of Berlese and Canestrini, but not of Koch. 
The best published drawing of the species is that by Berlese in 
his ‘ Acari (^c. Ital.’ 
This species is probably the one treated of by Winkler in his 
‘ Anatomie cler Gamasiden’;^ he calls it ‘‘ Ur opoda ohscura Koch? 
If, as is probable, he identified his species from Berlese’s drawing, the ? 
may well have been introduced on comparing it with Koch’s original 
drawing and description ; his paper is strictly anatomical, and I 
imagine that we have been dissecting the same species from the 
agreement of his description of the alimentary canal and other internal 
parts with what I found, although they differed from U. Krameri, 
which I before dissected. Winkler does not describe the parts which 
I shall deal with in this paper. 
As to the synonymy of the other species, which I call “ U. 
vegetans ” in this paper, it is not possible to speak with any confidence. 
The only thing which, I think, may be relief on is that the creature 
spoken of is identical with the U. ovalis of Kramer, which, as above 
stated, I do not think is really Koch’s ovalis. U. vegetans was origi- 
nally described by de Geer,§ who calls it ^^Acarus vegetans J the 
genus Uropoda having been originated by Latreille.|| He Geer’s 
figure and description were probably taken from immature specimens ; 
they are not sufficient to identify the species, but they do indicate a 
creature the shape of Kramer’s ovalis, and the immature forms of 
which attach themselves to insects in the singular mode so well 
known in this genus. De Geer does not say whether the first pair 
of legs are terminated by a sucker and claw, or by hairs only ; nor 
can this be gathered from the figures. Numerous early writers 
practically simply quoted de Geer, without throwing much further 
light on the subject. 
* Ease. xl. p]. ix. t Prosp. d. Acarofaima ital., Padua, 1885, p. lOB. 
X Arbeiten d. Zool. Inst. Wien, t. vii. Heft 3, 1888. 
§ ‘Me'raoires pour servir a I’Histoire des lusectes,’ Stockiiolm, 1778, t. vii 
p. 123, pi. vii. figs. 15-19. 
11 ‘Genera Crustaeeoruin et Insectorum,’ Paris, 180G-9, genus G2. 
1890. 
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