714 APPENDIX. 



New Classification of the Hemiptera. — Prof. Schiodte 

 has proposed the following classification of the Hemiptera, 

 whicli is probably the best yet suggested, and is based on a 

 more profound study of their external anatomy than has been 

 previously made. It will be noticed, however, that the lice 

 (Pcdiculina) are not included, though he regards them as 

 forming a separate division. (^Siphunculata Latr.) of equal value 

 with the Heteroptera and Homoptera. He does not seem to 

 include the Mallopbaga among the Hemiptera. The families 

 of the Homoptera are not characterized. 



I. Geiia3 (cheeks) hollowed out, to receive the first pair of coxse. 

 [Posterior pair of coxa; hinged, provided with femoral grooves.] 



Suborder Homoptera. 



II. GeuEB entire, remote from the coxa;. 



Suborder Heteroptera. 

 A Posterior coxse acetabulate, rotating, with no femoral grooves. Trochalopoda. 



a. Metathoracic epimera laminate, nearly concealing the first venti-al segment 



[of the abdomen. 

 1. Antenna covered at the base. Fam. 1. Cimices. 

 'Z. Antennje entirely uncovered. 



*. Antennas inserted before the eyes. Fam. 2. Corel. 



**. AntennjB inserted below the eyes. Fam. 3. Lygai. 



b. Metathoracic epimera without the ventr;d lamina. [metrm. 



1. Claws superposed (inserted befoi'e the cud of the joint). Fam. 4. Hydro- 



2. Claws terminal. 



*. Metathoracic epimera almost covered by the mesothoracic epimera. 



Last pair of abdominal spiracles forming a short tube. Fam. 5. Nepce. 



**. Metathoracic epimera wholly uncovered. Abdominal spiracles equal. 



[Fam. 6. lieduvii. 

 B. Posterior coxa; hinged, provided with femoral grooves. Pagiopoda. 

 a. Anteun.'B uncovered. Fam. 7. Acanthue. 

 b Antenna; partially covered. 



1. Body depressed, prone, 

 o. Beak free. 



t. Metathoracic epimera uncovered. 

 *. Feet cursorial. Fam. 8. Pelegoni. 

 **. Feet natatory. Fam. 9. Naucorides. 

 tt. Mesothoracic epimera almost covered by the metathoracic epimera. 



[Fam. 10. Belostomata, 

 p. Beak free. [Metathoracic epimera uncovci-ed, appeudiculated.] Fam. 



[11. Corixcc. 



2. Body boat-shaped, supinate. [Metathoracic epimera" uncovered. Beak 



free.] Fam. 12. Kotonectoi. 



New Classification of the Spiders. — The arrangement 

 of the groups of spiders given by me is very imperfect. I 

 therefore present the following classification of Dr. T. Thorell 

 (On European Spiders. Part I, 1869-70) as the most satisfac- 

 toiy. While I have considered the Araneina as forming a sub- 



