20 



George A. Schultz 



Figs. 26-31. 26, Porcellio virgatus. 27, exopod of pleopod 1 of male P. virgatus. 

 28, Cylisticus convexus. 29, exopod pleopod 1 of male C. convexus. 30, dorsal 

 view of head of Armadillidium nasatum. 31, Armadillidium vulgare. 



distinguished from other species of Porcellio by the presence of tuber- 

 cles (scabers) on the head (Fig. 22). Such head tubercles are absent in 

 other species from the New World. They are present on the segments of 

 the thorax as well in P. scaber. From a few scattered records the species 

 breeds from late May to November in the Durham region. Specimens to 

 16 mm long are common. 



Porcellio laevis Latreille 

 Figs. 24, 25 

 Porcellio laevis Latreille. Van Name 1936:229, fig. 129. Brimley 1938:502. 

 Schultz 1961:194. 



In North Carolina this common, large species is collected almost 

 exclusively around human habitations. It is rare in woods and other 

 remote locations. In both the Durham region and at Beaufort it was 

 taken almost exclusively near building foundations and in refuse heaps. 

 North Carolina is probably the southern limit of its range, since it was 



