WITH DESCRIPTIONS OF NEW SPECIES 27 



scutum is devoid of setae. In spinipes the dorsal setae of the 

 14th scutum are minute and sparsely set, representing a con- 

 dition intermediate between immaculata (in which this scutum 

 is well clothed with setae) and the present form biscutata. The 

 cerci are shorter and deeper than in spinipes, and the tactile 

 setae are longer and stronger. The setae of the legs are not so 

 long and conspicuous as in spinipes, and are fewer than in 

 immaculata, whilst the hind legs (if not all the legs) are more 

 than usually stout, and have only two or three setae on the 

 dorsal row of the tarsus. 



Fig. 3. Scutigerella biscutata. 

 Metatarsus and tarsus of last left leg X 120. 



I hope to obtain further material and make a special study 

 of both spinipes and biscutata before the promised Ray Society 

 Monograph of the British Myriapoda is published. They are 

 highly interesting forms, and whilst both are well characterised 

 they belong to what I consider to be the most difficult group 

 we have in the Symphyla, difficult chiefly on account of the 

 lack of useful characters in the shape and chaetotaxy of the 

 intermediate scuta, which make the second group of the genus 

 a much easier one to work. 



Distribution. — I first recognised this distinct species from 

 examples taken in a dene at Fencehouses, together with the 

 Diplopod Titanosoma jurassicwn Verhoeff, in the early spring 

 of this year (1911), and on searching for further specimens of 

 these arthropods I also found another interesting Scolo- 

 pendrellid in the same dene, namely, Scolopendrella delicatula 



