SCOLOPENDRA. 15 
4. Scolopendra pygmea, sp.n. (Tab. II. figg. 8, 8 a-c.) 
Colour pale olivaceous or pale ochraceous, sometimes with indications of a darker median longitudinal dorsal 
band ; posterior pleure and maxillipedes ferruginous. 
Body slender and parallel-sided. 
Head not suleate, with its posterior margin straight and meeting, but scarcely overlapping, the first tergite. 
Antenne attenuate, moderately long, composed of from 20 to 26 segments, whereof the basal 4 are nearly 
naked and the rest pubescent. 
Maxillipedes: prosternal plates somewhat long, separated in the middle and sometimes diverging, the anterior 
border a little oblique and bearing 4 (3) teeth, whereof the three internal are short and close together, 
and the external separated and more slender ; femoral tooth small, sharp, and bifid. 
Tergites more equal in size than is usual, the first not anteriorly sulcate, with two fine anteriorly abbreviated 
posterior longitudinal sulci, a little longer than the second, but shorter than the third ; the second to the 
twentieth strongly bisulcate, and with simple unraised margins. 
Sternites strongly bisulcate and faintly impressed laterally and mesially. 
Anal somite: tergite narrow, about as long as wide, nearly parallel-sided, with raised margins, posterior border 
produced, with median longitudinal sulcus ; plewre furnished with an anterior inferior porous area as in 
Cryptops, supetior and posterior portion smooth, the pores numerous, larger and smaller, and close set, 
process slender and elongate, with one lateral, four apical or subapical spines, and sometimes one superior 
spine, the posterior border of the pleurs: furnished with one or two spines; sternite long and narrow, a 
little narrowed posteriorly, with rounded angles; legs long and stout, the patella and tibia being about 
as thick as the femur; femur armed with about 23 small spines arranged in longitudinal series approxi- 
mately at follows—2 on the upper-inner edge, 2 on the inner surface, 5 and 4 on the under-inner edge, 
5 and 5 on the under-outer edge ; the inferior surface sometimes without spines in the middle and depressed 
in front, the process short and bifid; the patella, tibia, and proximal tarsal segment with upper inner 
edge internally produced and rounded, the under inner edge flattened ; both tarsal segments thick and 
sparsely pubescent, not armed with a spine, claw with two spurs. 
Legs with claws spurred; tarsi of sixteenth to twentieth unspined, the rest with a minute spine; the twentieth 
pair of legs considerably larger than the nineteenth, as in Cryptops, the distal tarsal segment more than 
half the length of the proximal. 
Length up to 37 millim. gia 
Hab. Mexico, Amula 6000 to 7000 feet (7. ZH. Smith). 
In this species the first tergite presents no transverse arched sulcus behind the head- 
plate. It is further remarkable for the rounded, swollen appearance of the segments 
of the anal legs. 
The description has been drawn up from the examples from Amula, but in 
the British-Museum collection there are others obtained at San Diego (Texas) by 
Mr. William Taylor, which appear to belong to the same species. These examples 
show that the four tergites at the hinder end of the body may have raised margins 
and that the first tergite is not always bisulcate behind. 
It is possible that the species is based upon young individuals ; but apart from their 
small size the specimens examined appear to be adult. At all events, they may be 
readily recognized from all the other Central-American species, as may be seen from 
the synoptical table. 
co 
5. Scolopendra pomacea. (Tab. II. figg. 7, 7a.) 
Scolopendra pomacea, C. Koch, Syst. d. Myr. p. 170. 33 (1847)*; Die Myr. i. p. 65, fig. 56 (1863) *. 
Scolopendra chichimeca, Saussure, Mém. Soc. Phys. Genéve, xv. p. 386, t. 7. fig. 44 (1860) °; Humb, 
& Sauss. Miss. Sci. Mex., Myriop. p. 182, t. 5. fig. 13 (1872) *. 
