1839-1964 Most of the papers are 19th century by authors like Brongniart, Saussure, Bolivar, Dominique, Graber, Bruner, Erichson, Burr, Yersin etc. The majority of the papers are taxonomical or faunistical.
1866-1891 Including: Riley, Destructive Locusts, Riley, The Rocky Mountain Locust (with 6 large col. folded maps) and 5 other papers mainly on locust invasions Algeria.