Page:Wood 1865 - The Myriapoda of North America.djvu/97

232 SYNOPSIS OF NORTH AMERICAN MYRIAPODA.

CHILOPODA.

Segments of the body provided with a single pair of feet.

. SCHIZOTARSIA.

Tarsi composed of a very great number of small joints.

Fam. CERMATIIDÆ.

C. forceps.

. LITHOBIIDÆ.

Dorsal scuta 15, two sets; a smaller scutum alternating with a larger.

Lithobius.

Excavations on the posterior coxae large, ovate, arranged in a single series upon a depressed face.

L. Americanus. Scuta smooth, not rugose. Labial denticules about 10.

L. planus.† Scuta rugose. Labial denticules about 14.

L. paucidens. Labial denticules about 4.

BOTHROPOLYS.

Excavations on the posterior coxae small, almost round; arranged in a three or four-fold series on a scarcely depressed face.

B. multidentatus. Ocelli on each side from 32 — 37.

B. Xanti. Ocelli on each side 18. Surface of the scuta very roughly rugose.

B. bipunctatus. Ocelli on each side 18. Surface of the scuta but slightly roughened.