10 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Tn 1860 an extensive monograph of the Mexican Myriapoda was pub- 

 lished from Geneva by Henri de Saussure, in which were described a 

 few species from the United States and other portions of America. 

 This was soon followed (1863) by Koch's elaborate work, "Die Myria- 

 poden," in which he described and figured fifteen species from the 

 United States. 



Dr. H. C. Wood published a series of papers from 1861 to 1867 which to 

 this time are the most extensive series published by a single individual, 

 and which have formed the basis of subsequent study. His papers in- 

 clude a preliminary paper on Scolopendra (1861), followed by a general 

 catalogue of the Chiiopoda of America (1863) ; in 1864 appeared three 

 papers on the various families of the Diplopoda, and the next year his 

 "Myriapoda of North America," in which he described all the species 

 then known to inhabit this country, comprising eighteen genera and 

 ninety-two species. Two brief supplementary papers appeared in 1867 

 on sundry new species from California and Texas respectively.* A 

 monograph of Lithobius by Ludwig Koch appeared in 1862, containing 

 two species from the United States. 



During the years from 1869 to 1872 E. D. Cope published, in three 

 papers, descriptions of several cave myriapods, including the new 

 genera Pseudotremia, Andrognathus, Petaserpes, and Scoterpes. Hum- 

 bert and Saussure published "Myriapoda Nova Americana " in 1869, 

 which contains only Mexican species, many of which are likely, how- 

 ever, to appear on our Arizonian borders when the Myriapod life of that 

 region shall be studied. In 1870 Dr. Packard noted the discovery of 

 Pauropus in Massachusetts, the first appearance of the order Pauro- 

 poda in America. In the same and the following year Meinert described 

 two species from New Orleans in his "Myriapoda Mussei Hauniensis," 

 I, II. In 1872 Oscar Harger described a number of species with the new 

 genus Trichopetalum. 



During the same year the sixth part of the " Mission Scientifique au 

 Mexique" appeared, consisting of De Saussure's elaborated "Etudes 

 sur les Myriapodes." In this work several species from the United 

 States are described, and a very complete catalogue of all the described 

 species from the American continent is appended. In Hayden's Geo- 

 logical Survey of the Territories, Annual for 1873, Dr. Packard gives 

 some notes on the Myriapods of Colorado, and describes, without assign- 

 ing names, several new forms. In 1887 he described Polydesmus cavi- 

 cola, a cave-inhabiting species from Utah. 



The travels in this country of Gustaf Eisen led to the collection of 

 various groups of animal forms, besides the Vermes, in which he was 

 particularly interested. The species of Lithobius collected by him were 

 described by Dr. Stuxberg in 1875, amounting to seven species. Two 



*As Dr. Wood nowhere mentions the work of either Saussure or Koch it is more 

 than probable that they were unknown to him. This is still more evident from the 

 synonyms which have resulted. 



