312 The Irish Naturalist. 



Brachydesmus superus, Latz. 



GlengarifF, 



Common in Kngland, Scandinavia, AUvStria, etc. The genus 

 BrachydesDiiis may be recognised from Polydesiims by possessing 

 nineteen body-segments instead of twenty. 



FAMIIvY CHORDEUMID^. 

 Atractosoma polydesmoides (Leach). 

 Dublin (Leeson-park); Armagh. 



Common throughout the south of E)ngland, but not yet recognised 

 on the Continent. 



FAMILY lULID^. 



BSaniuIus fuscus, Stein. 



Bnniskerry (Co. Wicklow); Kylemore (Connemara). 



Blaniiihts may, in a rough way, be recognised from the following 

 genus luhis, by the absence of longitudinal stri^ on the dorsal sur- 

 face of the segments. B.fusais is common in the south of England. 



lulus luscus, Mein. 



Bnniskerry (Co. Wicklow); Derrynane ; Kylemore (Connemara). 



Not uncommon in the south of England. A small nearly uniform 

 pale, brownish species, without a caudal process. Found under 

 stones. 



I. punctatus, Leach, [sihancm, Mein). 



Dublin mountains ; Enniskerry ; Kylemore ; GlengarifF ; 

 Killarney. 



Common all over the south of England, Denmark, Scandinavia, 

 etc. Always found in rotten wood, never under stones. A pale, 

 brown-banded and brown- spotted species, with the caudal process 

 rounded and clavate at the tip. 

 I. pilosus, Newp. 



Enniskerry (Co. Wicklow) ; Poulaphuca ; Kylemore; Killarney; 

 Drogheda. 



Some of the specimens that are here referred to /. pilosus are 

 immature, and, consequently, may be wrongly determined. The 

 adults are all females, and since no males were obtained, the identi- 

 fication must be accepted with reservation. 

 I .nigcir, Leach [transverso-sulcahis, Stein, allnpes, C. Koch). 



Tibradden mountain (Co. Dublin) ; Devil's Glen (Wicklow). 



This species when adult is black with very pale legs ; it is one 

 of the largest British species ; has an acute caudal process, and may 

 be at once recognised by the presence of transverse striae upon the 

 anterior half of the body-segments. 



I. sabulosus (Linn.) 



Tibradden mountain (Co. Dublin); Belmont and Devil's Glen 

 (Wicklow). 



This is a large species, with a long acute caudal process like 

 niger and pilosus. It may, however, be recognised at a glance from 

 both of these by the presence of two yellow stripes along the dorsal 

 surface. 



For the vSpecimens from Castletown Berehaven, I am 

 indebted to the Committee appointed by the Royal Irish 

 Academy to investigate the Irish fauna and flora ; and I would 

 express my thanks to that body for the opportunity of in- 

 cluding the records in the above list. 



