FURTHER RECORDS OF SOME BRITISH SYMPHYLA 



175 



Scolopendrella jacksoni sp. nov. 



Allied to isabellce Grassi and dunelmensis Bagn., of about 

 the same size and build, and differing in the chaetotaxy of the 

 scuta, legs and cerci. 



The legs of the last pair have only two long protruding 

 dorsal setae on the metatarsus, and not more than four similar 

 setae on the tarsus, whilst the recumbent hairs are almost as 

 lone as the erect ones. 



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Fig. 1. Scolopendrella jacksoni sp. n. 



A. Left hind leg. 



B. Lateral view of cercus. 



C. Left side of 2nd and 3rd dorsal scuta. 



The setae of the cerci are slightly fewer and distinctly longer 

 than in either isabellce. or dunelmensis. The scuta possess 

 several long prominent bristles on the lateral margin and on 

 the inner margin of process also. In the allied species there 

 are no such long setae on the inner margins of processes. The 

 lateral margin of the second scutum has five long prominent 

 setae, including the antero-lateral and apical ones, and the 

 inner margin of the process is furnished with two such setae. 



Distribution. — Several examples taken by Dr. A. Randell 

 Jackson at Saltney Ferry, Cheshire, in the spring of this year. 

 I have much pleasure in naming the species in honour of its 

 captor. 



