10 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



In 18r»0 an extonsivo monofjraph of the Mexican ^Iyriapo<la was pub- 

 lished from Geneva by Henri <le Saussuie, in which were described a 

 few species from th<> I7iiited States and other jmrtions of America. 

 This was soon followed (1803) by Koch's elaborate work, "Die Myria- 

 poden," in which he described and ii^aired fifteen species from the 

 United Stfites. 



Dr. H. C. Wood pnblished a series of papers from 18(51 to 18G7 which to 

 this time are the most extensive series pnblished by a sin<ile individual, 

 and which have formed the basis of subsequent study. His pai)er8 in- 

 clude a })reliminarv i):ip('r on Seoloprndra (18(11), followed by a general 

 cataloj^ne of the Chiiopoda of America (18()3); in 18(J4 app<'ared three 

 papers on the vari<>us families of the Diplopoda, and the next year his 

 "Myriapoda of Xorth America," in whi(;h 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 TAt hob ins by Ludwig Koch appeared in 1802, containing 

 two species from the United States. 



During the years from 1809 to 187U E. D. Cope published, in three 

 papers, descriptions of several (;ave myriai)ods, including the new 

 genera Fseu^otrcmia, Anclrofpuifhus, Pctftserpcs, and Scolerpen. Hum- 

 bert and Saussure published "Myriapoda Xova 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 tin; discovery of 

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

 poda in America. In the same and the following year Meinert desci ibed 

 two species from New Orleans in his "Myriapoda Mus.Ti Hauniensis," 

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

 genus Trk'hopetahtm. 



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 Pohfdesmus cavi- 

 cola^ a cave-inhabiting species from T'tah. 



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 Lithohius collected by him were 

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



*A8 Dr. Wood nowhere mentions the -^vork of either Panssnre or Koch it is more 

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

 synonyms which have resulted. 



