id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-269	Frison, Theodore	The Stoneflies, or Plecoptera, of Illinois	1935	197	.pdf	application/pdf	59359	4370	70	The same also applies to Illinois species of the genera Hydroperla, Perlinella and certain species of Isoperla. Species often with gill remnants in cervical region, known Illinois species always NEMOURIDAE, p. 349 Apical marginal space beyond tip of subcosta without an oblique crossvein, fig.	cache/inhs-269.pdf	txt/inhs-269.txt