1885. ] Entomology. 1001 
1. Orthoptera (in the wider sense of authors and of Gerstaecker). 
2. Thysanoptera. 
3. Rhynchota, 
4. Petanoptera (Neuroptera, Panorpate, Trichoptera, Lepidoptera, Diptera and 
Siphonaptera). 
5. Coleoptera. 
6. Hymenoptera. : 
The sixteen orders are as follows, beginning with the lowest : 
ata, 
4. Plecoptera (Perlariz), 
5, Orthoptera (Blattidze, Mantide, Phasmide and Saltatoria), 
6. Corrodentia (Mallophaga, Atropina, Psocide and Termitidæ). 
7. Thysanoptera (Thripsidz), 
8. Rhynchota (Hemiptera). 
9. Neuroptera sensu str. (Megaloptera and Sialidz). 
Io. Panorpatze. 
tr. Trichoptera. 
12. Lepidoptera. 
13. Diptera, 
14. Siphonaptera (Aphaniptera). 
15. Coleoptera. 
16. Hymenoptera, 
Space forbids any farther abstract of Brauer’s important paper, 
or offering any criticisms. We are, however, by no no op- 
posed to the dismemberment of the Pseudoneuroptera, an vty 
inclined, with Brauer, to recognize the Panorpate as a a 
€qual importance with the Trichoptera. We are also raspa 
with the belief that the orders of insects are more numerous than 
usually accepted.—A. S. Packard. 
Histotocy anp Emsryotocy oF Insecrs.—The investigations 
of M. Weismann upon the changes which take place in the pupa 
State of insects are well known. M. Viallan as followed ina 
the same path, and a recent issue of the Revue Scientifique 
* Saussure’s Hemimerus is regarded as unlike all other insects in possessing four 
and not three pairs of jaws, and “ must form a new class, 
