4 CHILOPODA. 
a’. About 27 millim.; external coxal tooth on each side larger 
than the internal (for sexual character, see Tab. I. fig. 4d) . pontifex, sp. n. 
b°. About 18 millim.; external tooth on each side smaller than 
the others (for sexual character, see Tab. I. fig. 5c) . . . Aumberti, sp. n. 
b*. Male with legs of the fourteenth and fifteenth pairs modified ; the 
first tarsal of the anal leg unmodified. 
a’. Antennal segments about 40; angles of the seventh tergum 
not produced, with an elongate crest on the patella of 
the analleg . . . . ‘ oe . « . vulcani, sp. n. 
6°. Antennal segments about 50; angles of the seventh tergum 
produced, with a rounded prominence on the patella of 
the anal leg. 
a’. Tibia of the fourteenth pair in male much thicker than 
the patella, deeply grooved, and hairy above. . . . godmani, sp. n. 
b°. Tibia of the fourteenth leg in male only a little rider 
than the patella . 2 2. 1. 1 1 6 ee ew ee ee) Salvini, Sp. n. 
1. Lithobius macroceros, sp. n. (Tab. I. figg. 3, 3 a-d.) 
Colour of upper surface ochraceous or castaneous, anteriorly and posteriorly darker than mesially, the head 
castaneous; under surface and legs pale ochraceous or pale castaneous ; antenne darker in tint than the 
legs. 
Body long, narrow, and nearly parallel-sided, shining. 
Head a little wider than long, minutely and closely punctured, shining and smooth, lightly convex, with 
raised lateral and posterior margins; the frontal plate distinctly defined and conspicuously longitudinally 
grooved. 
Eyes composed of 10 ocelli, 1+3, 3,3; the posterior eye large, irregularly ovate, and widely separated from 
the rest, the superior ocelli of the cluster larger than the inferior. 
Antenne very long, more than half the length of the body, attenuate, composed of from 58 to 63 subcyliadrical, 
thickly but shortly hairy segments, less thickly hairy quite at the base; apical segment always longer 
than the one that precedes it, but not thicker. 
Coxal plate of maaillipedes smooth, shining, very indistinctly punctured, hairy in front, longitudinally 
depressed and sulcate throughout its length in the middle, the anterior bordér angularly excised in 
the middle, the margins of the excision lightly convex and sloped inwards, bearing on each side 6+6 or 
5+5 minute sharp teeth, the external of which are smaller and more separated than the internal. 
Tergites minutely and closely punctured throughout, distinctly wrinkled, but very much less wrinkled in front 
than behind, posteriorly sparsely hairy and roughened ; the first six with rounded posterior angles and 
straight posterior borders, the seventh with its posterior angles slightly produced but not sharp, the 
posterior borders of the eighth, tenth, and twelfth straight and with the angles squared ; the angles of 
the ninth, eleventh, and thirteenth produced and sharp, the angles of the fourteenth very slightly 
produced. 
Sternites sparsely -hairy, mesially and laterally impressed. 
Legs long and slender ; the first pair armed below as follows—0, 0, 0 (one posterior), 3 or 2 (one anterior), 
the anal legs armed below as follows—0, 1, 3, 3, 2, or 0, 1, 3, 2,15 the claw basally spurred, the coxa 
furnished with one superior and one lateral spine, the coxa of the fourteenth pair with one lateral spine, 
the rest of the cox unspined; coxal pores ovate, 6, 6, 6, 6, arranged in a single series. 
Generative forceps in the female with a simple undivided claw, and two separated, diverging, basal spurs on 
each side. 
Length up to 35 millim.; length of antenna of largest specimen 21 millim. 
Hab. Mxxico, Omilteme in Guerrero 7000 to 9000 feet (H. H. Smith). 
