274 Reviews and Extracts.—Natural History. 
2ndly,—They may mark off their own Insects, so as to know instantly whe¬ 
ther they have a species or not, by which means their desiderata will be 
shown 5 and this, the Author is persuaded, will enable students to enrich 
their cabinets by mutual exchanges, to an extent which could not be accom¬ 
plished by any other means. 3rdly,—It will form labels for cabinets. 4thly, 
—It will be a systematic Index to the ‘British Entomology,’ and also to 
‘ Gravenhorst’s Ichneumonidse.’ 5thly.—It will be a catalogue of the Au¬ 
thor’s Cabinet,” which however he says will give “no very adequate idea, 
from the vast number of species in his possession that are either unnamed, or 
with manuscript names only.” The Editor also remarks that “he has been 
able to add upwards of a thousand names, (besides Gravenhorst’s Ichneumon- 
idcB,) that will not be found in any other list.” 
3.— Magazine of Natural History. Edited by J. C. Loudon, 
F.Ij.S., &c. Published every two months, price 3.s.6c?. 
No. 22, FOR September, contains 
Page 431,— On Hermaphrodite Insects. Communicated to the Editor, by J. O. 
Westwood, Esq., of Hammersmith. 
Who took the figures from an extremely rare quarto tract, published by Pro¬ 
fessor Klug, of Berlin, Fig. 
34, represents the very rare 
Moth, BOmhyx plni, (^Eutri~ 
cha, Steph.) and by drawing 
a line down the body, it will 
be perceived that the left side 
of the insect, possesses the 
characters of the male, whilst 
the opposite side exhibits the 
contrary characters of the fe¬ 
male. Fig. 35, is a much 
more singular specimen of 
Bomhyx, {^Clmocdinpa, Curt.) 
Castrensis ,—the wings on the right side, being those of a male, and the an¬ 
tennae and abdomen of the left belonging to that sex; while the left wing, 
right antennm, and the right side of the abdomen, are those of a female. 
35 
Fig. 36, repre.sents the Bomhyxy [Hypogymnay Hubn.) with the antennae of the 
male, but the ground of the wings white, as in the female, with light waves; 
which the writer conceives may be a pale variety of the male. There is also 
the representation of an Hermaphrodite Stag Beetle, (^Lvcdnus Cervitf, L.) the 
left side of the specimen being male, with the jaw twisted, and the right side 
