240 Annals Entomological Society of America [Vol. Ill, 



Polydesmus (Kepolydesmus subgcn. nov.) anderisus sp. nov. 



Hrown to dark reddish hnnvn ; carinae along lateral edges and above 

 of lighter color, often yellowish, the jjale bands commonly more dis- 

 tinct caudad and frequently extending mesad along the caudal margin 

 of each segment; often some of the anterior segments are dorsally dis- 

 tinctly areolatcd with black, which may fonn a more solid transverse 

 band along the cej^halic margin excepting its lateral ends. Venter pale. 

 Legs yellow or light brown. Head brown, a dark blackish band between 

 the bases of the antennae, this band concavely excised on ventral side; 

 labral region yellowish. Antennae darker than the legs, being concolor- 

 ous with the dorsum of body. 



Vertex of head crossed mesally with a sharply impressed, distinct 

 longitudinal furrow. Vertex and frontal region sub-sparsely clothed 

 with short setose hairs, the clypeal region more sparsely ]:)rovided with 

 longer hairs. 



Antennae long; a little clavately enlarged distad. 



Body graduall\' narrowed cephalad from about the twelfth segment, 

 less strongly so caudad. 



First dorsal plate scarcely narrow'cr than the head inclusive of 

 genae, its greatest width about 2.3 times the mesal length. Anterior 

 margin mesally straight or nearly so, the lateral angles widely rounded. 

 Caudal margin slightl\' and widely mesally incurved, laterally extending 

 gradually cephalad to meet the lateral margin at a rounded angle. 

 Entire border of margins depressed. A transverse impression caudad 

 of the cephalic border, a broad median longitudinal depression extending 

 from this to the depressed border along the caudal margin. The rows 

 of minute setigcrous granules distinct, somewhat uneven; but the 

 main tubercles very obscure or not at all indicated. Segment finch' 

 roughened laterally. Each lateral margin with a single minute denticu- 

 lation. 



Second segment bent cephalad on each side. Antero-lateral cor- 

 ner sub-rectangular as is also the cauda-lateral, but the latter well 

 rounded. Shar])ly margined laterally, caudally and also along lateral 

 ])ortions cephalically. Lateral margin of carina with one distinct 

 denticle at antero-lateral angle and one or two faint or obsolete crenu- 

 lations or denticles indicated farther caudad. 



Third segment nearly as the second; but the anterior margin imme- 

 diately mesad of the eephalo-lateral angle more rounded and with a 

 small indentation. 



From the second segment caudad the ccj^halo-latcral angle becomes 

 more and more rounded and the caudo-lateral less and less so, the latter 

 finally becoming somewhat jjrodueed though not acute. The produced 

 caudo-lateral angle of the penult segment somewhat indented caudally. 

 Segments dorsalh' depressed mesad of the carinae, the depression 

 anteriorly bending obliquely cephalo-mcsad. Carinae bent a little 

 dorsad. Transver.se furrow deep and distinct, extending across dorsum 

 about half way from meson to each lateral margin. Tubercles not 

 sharply delimited, but rather more distinct on caudal segments. 



