228 THE MYRIAPODA OF NORTH AMERICA. 



Fa.m. POLYXKXI1U'], Newport. 



"Caput arcuatum, prominens. Corpus latum. Pedes attenuati; coxis maxiiuis. Segmentum anale fasciculis 



longis." 



Head arcuate, prominent. Body broad. Feet attenuate, with very large 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. 



Gex. POLYXENUS, Laln,7/,. 

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

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



P. FASCICULATCS. 



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

 before. Segments smooth, filiate at the incisures, and fasciculate with brown seta? each 

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

 ciliated' on the edge with seta? ; eyes small, oval, prominent, placed obliquely in the middle 

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

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



■' Inhabits the Southern States." 



Say, Journ. A. N. S., 1st scries, vol. ii, p. 108. 



Sue Ord. SUGENTIA.* 

 Caput parvissimum, conicum. Os clongatum, tubulatum. (Pigs. 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- 

 cealed 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 antennae are formed 

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

 numerous segments. The scuta maybe prolonged laterally into lamina-, but afford protec- 

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



* Order Sugentia, Brandt, Recueil. 



