Page:Wood 1865 - The Myriapoda of North America.djvu/40

Rh

This species is closely allied to S. gracilis, and it is possible that further specimens may show that the characters on which I rely in separating them vary. The differences are as follows: The labium (Fig. 16) closely resembles that of the first described species, but has the character not so well marked. The posterior pair of legs are more robust, with the tibia about equal to the femur in length, and pubescent. The lateral anal appendages are shorter and separated inferiorly by a much narrower space. The preanal scale is rather broader and more bent over the lateral anal appendages; and, finally, this species seems to attain to a larger size. Length, 2¼ inches.

Hab. California.—Smithsonian Collection.

GEOPHILIDÆ, Leach.

Segmenta numerosa, singulum subsegmentis duobus completis sed inæqualibus efformatum, et. pedum par unicum gerens. Oculi nulli. Antennæ 14 articulatæ. Pedes anales breves, styliformes.

Segments numerous; each formed of two complete but unequal subsegments, and bearing a single pair of feet. Eyes wanting. Antennæ 14 articulate. Anal feet short, styliform.