Fig. 25.—Lithobius erythrocephalus. (From C. L. Koch, Die Myriapoden.)

Family 2. Scolopendridae.

Body with 21 or 23 rings, no intermediate rings. Every ring with one pair of legs. The last pair very long. Last pair at the point of the last ring. Four or no eyes. Antennae with 17 or 20 joints. (Fig. 15, p. [31]).

Family 3. Notophilidae.

Fig. 26.—Notophilus taeniatus. (From C. L. Koch, Die Myriapoden.)

Body very long, 200 to 350 rings; alternate principal and subsidiary rings. A pair of legs to each principal ring. No eyes. Maxillary palps very thick. Compact or very short limbs. The terminal point of the last limb without claws.

Family 4. Geophilidae.

Body long, 80 to 180 rings, principal and subsidiary. No eyes. The maxillary palps not compact, and with first joint large. Last joint of the last pair of legs with a sharp claw.