218 Froceedings of the Royal Physical Society. 



fourfch. Eore feet with two, intermediate and hind feet with 

 three terminal tenent hairs; upper claw with exceedingly- 

 minute tooth, lower claw with distinct lamella and filiform 

 process (Fig. 13). Anal papilke very short and slightly 

 separated (Fig. 12); spines short and recurved. Spring with 

 dens and mucro together as long as manubrium; dens two 

 and a half times as long as mucro, which has a nearly straight 

 ventral edge, with two blunt, rounded knobs at the extremity, 

 and a narrow but distinct lamella (Fig. 14). The hairs on 

 the body are of the type of A. viaticus, Linn., short feeble 

 hairs only being present, except at the insertion of the legs 

 and on the hinder segment (Fig. 11), where a few long 

 straight bristles are found. The whole insect, excepting the 

 manubrium of the spring, is of a dark violet colour. 



Locality. — Morton, near Edinburgh, under stoues. 



As mentioned above, the Spring-tails found under stones 

 at Morton, near Edinburgh, in March 1899, and recorded by 

 us as Aclwrutes manubrialis, Tullb., are not referable to 

 Tullberg's species, although probably identical with the insect 

 recorded and in a manner described by Brook under the same 

 name. Further examination of these Morton specimens con- 

 vinces us that they do not agree with any described Continental 

 form known to us. The mucro of this form, to which we 

 have now given the name of A. propinciiius, is unlike that 

 of any Achorictes except A.Reuteri, Agren { = A. manuhrialis^ 

 Eeuter), which has very short and straight anal spines, and 

 only a single tenent hair to each foot, and A. similis, Absolon 

 (1900), which we gather (the description is in Bohemian) 

 has larger anal spines, and two tenent hairs on all the feet. 

 From A. viaticus, Linn., our species is distiaguished by its 

 much smaller size and the form of the mucro ; and from the 

 Arctic A. tidlhergii, Schiiffer {^A. cluhius, Tullb., nee Tempi.), 

 also by the absence of long hairs on the body-segments. 



Xenylla maritima, Tullberg. 



In our Edinburgh list (1899) we recorded JC. humicola, 

 Fab., from the shores of the Firth of Forth, at Dalmeny and 

 Aberdour. We now have to record also the presence in the 

 neighbourhood of the Firth of Forth of the nearly-related 



