THE ORDERS OF INSECTA. 971 
12, Thysanoptera, among them; 15, Isoptera or Termites; 16, 
Corrodentia limited to Psocide; 17 to 25 call for no remark ; 
96 consists of the forms allied to Sialis and Chauliodes ; 27 in- 
cludes only Raphidiide ; 28 consists of Hemerobiid forms; of 
29-35 it is only necessary to remark that the name Suctoria is 
applied to the fleas. 
For Handlirsch’s purposes it was desirable to adopt more 
Orders than are perhaps really necessary from the morphological 
and developmental points of view, and I think the following list 
may be considered sufficiently ample at the present day, viz. :— 
THE ORDERS ARRANGED. 
APTERYGOTA. 
1. Collembola 
(or Apontoptera or Synaptera). Wingless insects supposed to 
2. Campodeioidea. have descended from wing- 
3. Thysanura less ancestors. 
(or Aptera). 
ANAPTERYGOTA. 
4, Mallophaga 
(or Lipoptera). 
5. Anoplura Wingless insects whose ances- 
(or Ellipoptera). tors were probably winged. 
6. Siphonaptera 
(or Aphaniptera). 
EXOPTERYGOTA. 
7. Orthoptera. | 
8. Plecoptera. 
(= Perlaria.) | 
9. Psocoptera. 
(=Corrodentia.) | 
10. Isoptera. 
(= Termites.) 
11. Embioptera fs 
(or Embioidea). 
12. Ephemeroptera. 
(= Plectoptera.) 
13. Odonata 
_(or Paraneuroptera). 
14. Thysanoptera. 
15, Hemiptera. 
Winged insects whose wings 
develop outside the body. 
ENDOPTERYGOTA. 
16. Neuroptera. 
(= Planipennia.) 
17. Trichoptera. 
18. Lepidoptera. 
Winged insects whose wings 
arise as invaginations of 
the hypodermis, and for a 
19. Coleoptera. Geri eae. Stee 
9 ‘ time project within the 
20, Strepsiptera. ee : 
21. Diptera. y: 
22. Hymenoptera. 
