228 



THE MYRIAPODA OF NORTH AMERICA. 



Fam. POLYXENTD^E, Newport. 



" Caput arcuatum, prominens. Corpus latum. Pedes attcnuati; coxis maximis. Segmentum anale fascioulis 

 longis." 



Head arcuate, prominent. Body broad. Feet attenuate, with very largo coxa). Anal segment with long fas- 

 ciculi. 



As I have never seen a specimen of this family, the characters of it and the genus are 

 those given by Mr. Newport, Philos. Trans., vol. xix, p. 277. 



( 1 m. I '( ) LYXENTJS, LatrtiUe. 



"Corpus breve, squamis parvis penieillatis vestitum. Pedum paria 13." 

 Body short, clothed with small penieillate scales. Pairs of feet 13. 



P. FASCICULATUS. 



" Body pale-brown, linear, incisures ciliated, fasciculated each side ; head deeply ciliated 

 before. Segments smooth, ciliate at the incisures, and fasciculate with brown setse each 

 side ; terminal pencil cinereous ; head semi-orbicular, depressed, deeply and densely 

 ciliated on the edge with setae ; eyes small, oval, prominent, placed obliquely in the middle 

 of the lateral margin ; antennae very short, thick, reddish-brown ; feet white. Length 

 rather more than the one-tenth of an inch." 



" Inhabits the Southern States." 



Say, Journ. A. NT. S., 1st series, vol. ii, p. 108. 



Sun Ord. SUGENTIA.* 



Caput parvissimum, conicum. ()s elongatum, tubulatum. (Figs. 58, 59.) 

 Head very small, conical. Mouth elongate, tubular. 



In the Sugentia the head is very small, and is so placed as to be almost entirely con- 

 ceded beneath the broad anterior scuta. The parts around the mouth are so fused 

 together as to make a conical beak of greater or less length, suitable only for the imbi- 

 bition of liquid food. The eyes may be present or absent. The antenna; arc formed 

 according to the type of the Diplopoda, with seven joints. The body is composed of 

 numerous segments. The scuta may be prolonged laterally into laminae, but afford protec- 

 tion only to the back and flanks ; the central part of the abdomen is not covered by a firm, 



* Order Sugentia, Brandt, Recueil. 



