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~ more typical Homoptera from which no one thinks of separating 
„and composition (as no one better knows than my reviewer) of 
| 
to the past — do not always subserve the best interests of classification.” 
_ Sanoptera I distinctly state that they “may be placed with the 
these osculant groups with the following sentence: Ae : 
_ Teady stated, if separated from the other orders, these abnormal ; 
reality they differ no more from the orders to which they are ees 
a : tation from that part of my Report which refers to the diffe . 
_ Systems of classification, and which I quote because it helps We 
_ Answer both the beri 
Isi ZOOLOGY. 
tinctive terms, as wing, fin, arm, etc., used to designate the known — - 
modifications of the sarne embryonic organ, would not, to my 
mind, cause more confusion, or be less justified, than is he who 
calls an insect’s body 17-jointed simply because what is so palpa- 
bly a single joint, was originally formed out of four embryonic 
joints. There is a fundamental unity of elementary structure 
all living beings; and animal and plant may alike be traced to, 3 
and have their origin in, the simple cell. Embryologically, there- 
fore, all animals may be said to be alike, and in making our clas- 
sificatory distinctions we necessarily refer to the perfected or 
ultimate structures. i 
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as pointing to the derivation of insects — their homologies and relations 
We would inquire what is classification but an attempt at tracing the gen- 
ealogy of animals or plants? 
the Coleoptera ;” speaking of the Aphaniptera I say ‘‘ now = 
placed with the Diptera (5th Rep., p. 15); speaking of the Thy- 
Pseudo-newroptera, though bearing strong relations to the Hemip- ig 
tera (ibid., p. 16); and I finally conclude my consideration ob 
groups should, at the most, be considered as Suborders; and in- 
referred than, for instance, the bark lice (Coccidw) do from the 
them” (ibid., p. 16). 7 i 
(5) This stricture was doubtless inspired by the following q 
fifth and sixth strictures. ‘+ Remember! 
s are but means to an end — appliances to ™ 
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