and Species o/'Poljzonid£e. 223 



gerente. Segmentis quatuor anticis binis pedibus, cseteris 

 binis pedum paribus instructis ; ultimo (et penultimo ?) pedibus 

 carente. Pedibus articulis sex constantibus ; ultimo pedis arti- 

 culo apicem uugue armato. Laminis pedigeris liberis. Capita 

 sub segmentis anticis fiexo, fronte convexa ; margine antico vix in 

 rostrum producto. Oculis nullis. Antenuis articulis septem con- 

 stantibus ; in capitis lateribus positis ; articulo extreme minimo. 

 Mandibulis occultis. Gnatbocbilario manifesto ; stipitibus magnis ; 

 malis et cardinibus baud conspicuis ; lobis linguae parvse et tenuis 

 nullis ; mento malleo simili et magno. 



Owing to scarcity of material I have been unable satisfac- 

 torily to determine whether the mandibles be in reality absent or 

 not. The fact of their occurrence in 8iph,onoj)hora and Platy- 

 desmus leads me to believe that owing to my imperfect exami- 

 nation of the mouth-parts their presence has been overlooked in 

 this specimen. 



This genus differs from Platydesmus principally in the 

 absence of eyes and in the possession of a greater number of 

 segments. With Dolistenus (Fanz.) I am unable to compare 

 it, owing to my ignorance of the structure of the mouth- 

 parts in this form {cf. infra^ Note). 



Pseudodesmus verrucosus, n. sp. 



Number of segments in one specimen seventy- six, in another 

 seventy-two. Length of longer individual 34 millim., width 

 4| millim. 



Head somewhat pointed in front, rounded behind, convex 

 from before backwards, and from side to side ; thickly and 

 finely punctured, and thickly clothed with short hairs. All 

 the segments, the limbs, and antenna punctured and more or 

 less thickly covered with hairs ; the free ends of the keels, 

 the large tubercles, and the anal valves not punctured and not 

 hairy. The first segment bearing an irregular row of tuber- 

 cles on its anterior half, and provided on each side with a 

 larger lateral tubercle, corresponding in position with the 

 keels of the succeeding segments. That portion of each 

 segment which lies between the keel below and the large 

 dorsal tubercle above bearing one or more smaller tubercles, 

 which are more numerous upon the first three segments than 

 upon the others. Posterior border of last segment rounded 

 and tubercular. Anal valves convex and smooth ; posterior 

 border of subanal plate straight ; keels of the last segment but 

 one projecting directly backwards. In one specimen the last, 

 and in the other the last two segments are without limbs. 

 Colour mostly testaceous or yellowish brown ; legs and 



