2 H. J. HANSEN. 



cautha^ upon which he founded the genus Scolopeiidrella, 

 and referred it to the family Geophilidte. 



In 1844 Newport discovered the common species S. im- 

 maculatuj and established first the Scolopendrellinje as a 

 sub-family of the GeophilidaS;, but shortly afterwards as a 

 family near the LithobiidEe. 



In 1880 F. A. Ryder made an important step^ raising the 

 group to the rank of a separate order^ to which he gave 

 the well-chosen name^ Symphyla, and in 1882 he divided it 

 into two genera, ScolopendrelLa, Gerv.^ and a new one, 

 Scutigerella, Ryder. 



From 1873 to 1882 European and American zoologists had 

 established some new species, but in the treatment of Latzel 

 they have all been withdrawn as synonyms of the three 

 species mentioned above. At the end of 1882 not more than 

 three species were known from the whole world, but it must 

 be added that at least one of the species cancelled, S. micro- 

 colpa, Muhr (and possibly also S. gratis©, Ryder), must be 

 re-established as valid, and that the form described by Latzel 

 as S. notacantha, Gerv., var. munda, is not this species 

 (see the next page). To give a more detailed review, with 

 critical remai'ks, of the contents of Latzel's treatment is, in 

 my opinion, not necessary, especially as some points will be 

 mentioned in the following pages. 



In 1883 S. Scudder established a new North American 

 species, S. latipes, which certainly is dead-born (see 

 later on) . 



In 1886 B. Grassi published his important paper, " Mor- 

 fologia delle 8colopendrelle " ('Mem. d. Reale Accad. d. 

 Scienze di Torino,' Ser. 2 a, T. xxxvii, pj). 503 — 624, 

 Tav. i, ii). The author begins with a description of four 

 Italian species known to him: S. immaculata, Newji., 

 S. nivea, Scop., S. notacantha, Gerv., and a new form, 

 S. Isabellas, Grassi. He states correctly that S. nota- 

 cantha, Gerv., has the first pair of legs " relativamente 

 corto " and simple sette on the antennas; furthermore that 

 the species described by Latzel as S. notacantha is not 



