We review various simple analytical theories for homopolymers within a unified framework. The common guideline of our approach is the Flory theory, and its various avatars, with the attempt at being reasonably self-contained. We expect this review to be useful as an introduction to the topic at the graduate student level.

5 H. Leaderman, Annual Review of Physical Chemistry (Palo Alto, Calif.: Annual Reviews, Inc., 1958), 9, 179. 6 T. G. Fox and P. J. Flory, (a) J. Am. Chem. Soc., 70, 2384, 1948; (b) J. Phys. Chem., 55, 221, 1951. 7 T. G. Fox and P. J. Flory, J. Appl. Phys., 21, 581, 1950; J. Polymer Sci., 14, 315, 1954. 8 A. J. Barry, J. Appl. Phys., 17, 1020, 1946. 9 M. J. Hunter, E. L. Warrik, J. F. Hyde, and ...

The Chinese fauna of the family Trigonalyidae Cresson, 1887, is revised, keyed and fully illustrated for the first time. Eight genera of this family (Bakeronymus Rohwer, 1922, Bareogonalos Schulz, 1907, Jezonogonalos Tsuneki, 1991, re-instated, Lycogaster Shuckard, 1841, Orthogonalys Schulz, 1905, Pseudogonalos Schulz, 1906, Taeniogonalos Schulz, 1906 and Teranishia Tsuneki, 1991) are recorded ...