106 DESCRIPTIONS OF THE Mi'RlAFODA 



Body cylindrical, immarginate, above pale, obao- 

 letely reticulate, and varied with reddish; a lateral 

 series of large black spots, numerous longitudinal, 

 parallel, impressed, acute lines beneath the stigmata 

 becoming gradually shorter to the origin of the feet: 

 beneath whitish ; head white beneath the antennae ; 

 antennce two joints preceding the last somewhat di- 

 lated, not attenuated at their bases, nor separa- 

 ted by a contraction ; eyes black, longitudinally 

 sublimate; idtimate segment unarmed, longer than 

 the penultimate one, rounded at tip and blackish. 



Length nearly half an inch. 



Resembles J. impressus in the character of lateral 

 impressed lines, but is distinct by the unarmed termi 

 nal segment ; I found it rather common on the East- 

 ern shore of Virginia under the bark of Pinus varia- 

 bilis. 



Genus POLYDESMUS, Lair. 



Body elongated, linear depressed, segments with 

 a prominent margin ; ejes obsolete ; feet many ; an 

 tennse, second joint shorter than the third. 



Species. 1. P. *serratus. Segments with a dou- 

 ble transverse series of slightly raised squamifoTm 

 elevations. 



My Cabinet. 



Segments depressed above, with four minute ser- 

 ratures each side, first segment transversely oblong 

 oval, somewhat angulated on each side behind, second, 

 third and fourth segments with but three serratures. 



