650 A CONTRIBUTION TOWARDS A KNOWLEDGE OF THE 



Scolopendrella notacantha, Gervais. (PI. xix., figs. 3, 7, 



and 9).* 

 Scolopendrella notacantha, Gervais, Ann. d. Sci. Nat., ser. 3, 

 Zool., ii., p. 79. pi. 5, figs. 15-18, 1844, and Hist. Nat. d. 

 Insectes Apteres, iv., p. 301, pi. 39, figs. 7-76, 1847 \ 

 Grassi, Mem. d. Reale Accad. d. Sci. di Torina, ser. 2, 

 xxxvii., p. 594, 1886; Hansen, Quarterly Journal Micro- 

 scopical Science, xlvii., pp. 65-68, pi. 5, figs. 3a-3k. 



Prof. Hansen points out that the specimens described by 

 Latzel, Muhr, and Berlese as S. notacantha, Gervais, do not 

 belong to this species. 



This very distinct and interesting animal is the only one 

 belonging to Group I., and is easily separated from all other 

 species by the first pair of legs, which are more than two- 

 thirds the length of the second pair, and of normal shape. 

 The following characters, too, are peculiar to this species. 

 The hind margin of each scutum has a distinct longitudinally 

 striate belt between the pair of triangular processes ; the cerci 

 are without the raised transverse lines at the most distal part 

 opposite to the terminal area ; the head has the central rod 

 interrupted before the middle, where there is a pair of very 

 short branches, and the anterior branches are scarcely per- 

 ceptible. These characters, then, separate S. notacantha from 

 all known forms of Scolopendrella s.s., and form a connecting 

 link between the two genera. Hansen points out, in addition, 

 that the antero-lateral setae are longer in S. notaca^itha than in 

 any other European forms. 



This species is only definitely recorded from France and 

 Italy, Hansen showing that many records from localities 

 outside of Italy are uncertain or incorrect. 



My friend Dr. Randell Jackson took two examples of a 

 Scolopendrella in Cheshire, the smaller of which was identified 

 by Mr. Ellingsen, of Kragero, Norway, as S. notacantha, 

 Gervais. Dr. Jackson has kindly presented me with these 

 specimens ; the smaller one is undoubtedly referable to S. 



* Dr. Jackson records this capture in an interesting paper on " Some 

 Arthropods observed in 1909 " in the Lancashire Naturalist, May, 1910, p. 51. 



