Mr. G. Newport on new sj^ecies of Myriapoda. 265 



3. Z, castanea, mihi. Dark chestnut-coloured, roughened. Length 

 1 inch. Philippine Islands. 



4. — innominata, mihi. 



5. — heterostictica, mihi. Dull fuscous, with the rings mottled 

 irregularly with small and large blackish confluent spots ; head 

 and collar polished, brown ; labial margin blackish, deeply punc- 

 tured; antennae black. Length 1^ inch. India. 



I have adopted the name Zephronia for this genus on the autho- 

 rity of the figure of Z. ovalis by Mr. Gray in Griffith's ^Animal 

 Kingdom' (1832), where the characters of the genus, the form of 

 the eyes, and the form and number of joints to the antennae are 

 delineated, although no letter-press description of the genus or 

 species was then given. Professor Brandt claims to have first 

 described this genus by the name of Spharopoeus, in a paper 

 read to the Academy at St. Petersburg in August 1831 ; but no 

 abstract of this paper was published till 1833. While, therefore, 

 I would not pretend to decide on the priority of these two natu- 

 ralists, I have restricted the genus Zephronia to those species 

 which have but six joints to the antennse, and regard those with 

 seven joints to the antennse as constituting Brandt's genus Sphae- 

 rotherium. 



Genus Pollyxenus, Latr., Leach. 

 1. P. lagurus, Linn., Fabr. (sp.) 



Genus Fontaria, Gray. 



1 . F. virginiensis , Drury, (sp.) 



2. ? 



3. — dilatata, Brandt (sp.) 



Genus Polydesmus, Latr., Leach. 



1. P. complanatus, Linn (sp.) 



2. — canadensis, mihi. Light chestnut- coloured, polished ; with two 

 rows of broad, scutiform, very slightly raised tubercles on the 

 posterior half of each dorsal plate, four in the anterior and six in 

 the posterior row ; posterior border of each plate slightly waved. 

 Albany river, Canada. 



This species very closely approaches the common P. compla- 

 natus of this country, but differs from it in colour, and in the 

 anterior half of each dorsal plate being smooth and entirely desti- 

 tute of tubercles ; and also in the number of tubercles on the 

 posterior half. 



3. P. acutangulus, mihi. The posterior angles of all the dorsal plates 

 elongated and very acute ; antennse pubescent, with the head and 



