CONTENTS. 



1. A century of Orthoptera. Decade VII. — Acrydii (= Proc. pp. 27- 



35; publ. March 29 and April 30, 1877) 5 



2. New forms of saltatorial Ortlioptera from tlie southern United States 



(= Proc. pp. 35-41; publ. April 30, 1877) 13 



3. On tlie plienomena of circulation in insects { = Proc. pp. 77-79; 



publ. July 18, 1877) 19 



4. The Florida Orthoptera collected by Jlr. J. H. Comstock ( = Proc. 



pp. 80-94; publ. Sept. 7, 1877) ....... 21 



5. Note on the wing of a cockroach from the carboniferous formation 



of Pittstou, Penn. ( = Proc. pp. 238-39; publ. Feb. 19, 1878) . 35 



6. An insect wing of extreme simplicity from the coal formation ( = 



Proc. pp. 248-49; publ. Feb. 19, 1878) 37 



7. Note on Eutermes Rippertii ( = Proc. p. 275; publ. April 3, 1878) . 39 



8. Remarks on Calliptenus and Melanoplus, with a notice of the species 



found in New England (= Proc. pp. 281-86; publ. April 3, 1878) 40 



9. Brief notice of th& American species of Melanoplus found west of 



the 117th meridian (=Proc. pp. 286-90; publ. April 3, 1878) . 45 



10. Rhachura, a new genus of fossil Crustacea; with a plate ( Proc. pp. 



296-300; publ. Aprils, 1878) 50 



11. A carboniferous Termes from Illinois ( =^ Proc. pp. 300-01 ; publ. 



April 3, 1878) 54 



12. On dimorphism in western Acridians ( = Proc. p. 336; publ. July 



2, 1878) 55 



