Page:Wood 1865 - The Myriapoda of North America.djvu/101

236 S. rubens.† Pairs of feet 50. S. Whitei† Pairs of feet 76.

Each fully developed segment of the body provided with two pairs of feet.

. Mouth furnished with jaws suitable for the mastication of vegetable matters.

Sternum and scutum of each segment fused together into a complete ring. Body composed of few segments; each furnished with lateral laminæ.

Lateral pores on the 5—7—9—10—12—13—15—16—17—18—19 scuta.

Dorsum complanate. Lateral laminæ large, horizontal.

P. setiger. Scuta with minute, obtuse, tuberculoid scales (sometimes obsolete) with a row of acute, conical, seta-tipped tubercles along the posterior border. P. granulatus. Scuta covered with convex, obtuse, tuberculoid scales, arranged in four more or less irregular transverse series; none of them seta-tipped. P. hispidus.† Scuta with scales in five series. P serratas. Scuta with 9 — 10 complanate scales, arranged in two series, besides a third obsolete series. P. Canadensis. Color brown. Scuta with 8 scales, arranged in two series. P. cerasinus. Color cherry-red. Scuta like in P. Canadensis.

Dorsum moderately convex. Lateral laminæ large, horizontal.

P. erythropygus. Olive-chestnut; scuta with a large orange spot on their posterior surface. Lateral laminæ orange. Anal scutum broad, prolonged. P. hispidipes. Olive-brown, immaculate. Anal scutum triangular. Var. ? Ornamented with small orange spots. Lateral laminæ orange.

Dorsum convex. Lateral laminæ large, depressed.

P. Virginiensis. Chestnut, with yellowish lateral laminæ.