528 



ME. H. N. RIDLEY ON THE 



DiPLOPODA. 



Paeadesmus gbacilis {C. Koch). 

 Two female specimens. 



For the synonymy and an excellent description of this species, 

 see Dr. Eobert Latzel's ' Die Myriopoden der ost.-ungar. 

 Monarchic,' ii. p. 162. 



This very wide-spread form occurs in the East and West Indies 

 and Brazil. 



It has been introduced, in connection with tropical plants, 

 into Europe ; and I have examined many specimens of all ages, 

 which were captured in the conservatory of Mr. Alfred O. 

 Walker at Chester, andin the orchid-houses of Mr. Herbert Druce 

 at St. John's Wood. 



[It was very common in the garden. — H. N. i?.] 



Spirobolus (s. s.) noeonhensis, n. sp. 



Length about 30 millim. Number of somites 37. 



Colour deep slate-grey or almost black ; anterior half of each 

 somite (the first and last excepted) adorned above and below on 

 each side with a single reddish spot. Legs and labrum reddish. 



Distal portion of the head-plate furnished with a faint median 

 longitudinal impression, upon each side of which, near the 

 margin of the labrum, are two setiferous punctures, one near the 

 middle line, the other near the external portion of the labral 

 excavation. Distal segments of antennae pilose. 



First dorsal plate smooth, without striae ; laterally, where the 

 anterior and posterior margins pass into one another, evenly 

 rounded ; furnished wdth a fine sulcus which runs from near the 

 ocular region of the head-plate, close to the antero-inferior 

 margin, and terminates at the postero-inferior margin. 



Foramina repugnatoria situated, somewhat dorsally, in the 

 posterior portion of the somites. Posterior portion of each 

 somite smooth above ; anterior portion marked with transverse 

 striae ; inferior and lateral portions marked with numerous longi- 

 tudinal striae. Somites not furnished with the ' scobina.^ 



Posterior somite smooth ; produced behind into a blunt 

 rounded process, which extends slightly beyond the margins of 

 the anal valves. Anal valves with margins not compressed. 

 Margin of subanal plate rounded. 



