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REPORT ON ZOOLOGY, MDCCOXLII : 
lives, in masses, on the under side of the branches of different willows, 
and appears winged in October. The other species mentioned, seem to 
agree with the European; as one, which lives on the roots of plants 
{e. g. the Chinese aster), agrees with A. radicum ; another, on peach 
trees, with A. persicce, Sulz. The A. lanigera, Hausm., is also beginning 
to show itself in America, though not as yet very widely distributed. 
THYSANURA. 
Waga (Ann. d. 1. Soc. Ent. d. Fr. xi. p. 264, t. 11, f. 5-8) has made 
known a new species, distinguished by its size, under the name of 
Achorutes bielanensis. It is a true Podura, and is placed beside the 
P. armata, Nic. It is found in the low grounds of the Forest of Bielany, 
on the bank of the Vistula, near Warsaw, in great abundance. The 
author remarks, that at first the young ones have no trace of the spring- 
ing-fork, and questions whether the species of Anurophorus (Lipara, 
Burm.) may not be the young of this genus. Paul Gervais has made a 
new genus, Anoura, for the Achorutes tvherculatus, Nic., to which he 
has added a second species, A. rosea. The characters are not given. 
(Ann. d. 1. Soc. Ent. d. Fr. xi. p. 47.) 
PARASITA. 
This order has been treated of by Denny in a comprehensive monograph, 
“ Monographia Anoplurorum Britannias or an Essay on the British 
Species of Parasites, Lend. 1842, 8vo., with twenty-six coloured copper- 
plates. As the extensive researches of Nitzsch on the Epizoa do not 
seem to have been published, this work not only fills up an evident gap 
in entomological literature, but will also give an impulse to the investi- 
gation of these little regarded animals. The definition of species, of 
which a considerable number of new ones have been observed by the 
author, is well illustrated by engravings. The division into genera and 
sub-genera is that of Nitzsch, only there is a new sub-genus, Nitzchia 
(N. Burmeisteri, from the Swift), added under Liotheum.* Exact in- 
vestigations on the parts of the mouth are unfortunately omitted. The 
author has been content to give again, in Pediculus, the erroneous 
figures of earlier observers. 
Gurlt (Mag. f. d. ges. Thierheilk. 8 Jahrg. 4. st. p. 409, t. 4, und 9 
Jahrg. 1. st. p. 1, t. 1) has given an excellent representation of the para- 
■* Nitzsch has already long had the honour — at least it is so intended — of 
lending his name to a genus of intestinal worms. 
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