2 CHILOPODA. 
Sterna mesially sulcate and, at least in the posterior half of the body, with the hind borders mesially 
emarginate. 
Length up to about 19 millim. 
Hab. Nortu America, Texas !.—Mexico, Chilpancingo 4600 feet, Omilteme 8000 feet, 
and Amula 6000 to 7000 feet, all in Guerrero (H. H. Smith), Oaxaca”; GUATEMALA, 
Volcan de Pacaya (Stoll); Nicaragua, Granada °. 
This species differs from the common North-American Scutigera forceps (Raf.), 
which is very closely allied to, even if not identical with, the common S%.-European 
S. coleoptrata, in being of smaller size, in having its tergites more closely spicular and 
the head less flat; moreover, the median band of colour on the tergites of S. forceps 
extends over the stoma-saddles on each side of the stomata, instead of falling short of 
them as in S. linceci. 
According to Mr. H. H. Smith these centipedes are found under logs and stones in 
damp places. They are exceedingly fragile, the legs breaking off at the least touch, so 
that it is almost impossible to secure perfect specimens. 
2. Scutigera nigro-vittata. (Tab. I. figg. 2, 2a.) 
Scutigera nigro-vittata, Meinert, Proc. Am. Phil. Soc. 1886, p. 173?. 
Colour: upper surface black or very deep brown, with a wide, median, dorsal, flavous band extending from 
the anterior extremity of the labrum to the posterior extremity of the terminal tergite; this band crosses 
the middle of each half of the stoma-saddles and is uninterrupted except for a black patch on each 
stoma ; the lateral portions of the head and the tergites just above the side-margins furnished with a 
fine irregular flavous band; sternal surface fulvous. The legs nigro-annulate, the femur adorned 
beneath with two rings—a proximal smaller, which is very incomplete above, and a distal larger, which is 
almost complete above ; the patella with two wide rings and a fuscous distal extremity ; tibie indistinctly 
biannulate ; tarsi fulvous, concolorous. 
Head with labral area sparsely hairy ; region above it in front of the eyes deeply sulcate longitudinally, and 
furnished on each side of the sulcus with two longitudinal, subparallel, apically curved ridges, which 
posteriorly diverge and meet the inner angle of the eye; area between the eyes deeply scooped trans- 
versely ; margin of the head raised and smooth. 
Tergrtes smooth in the middle line, sparsely spicular elsewhere; the borders raised, spicular, the posterior 
border mesially emarginate ; the stoma-saddles sparsely spicular, ill-defined, but much wider than long ; 
posterior tergite with its hinder border not excised. 
Sterna hairy, mesially sulcate. 
Legs carinate and serrate. 
Length 22 millim. 
Hab. Panama !.—VENEZUELA, Caracas. 
This species was described by Meinert from Panama. The accompanying figure 
and description have been taken from an example sent to the British Museum by 
Dr. Ernst. This specimen was from Caracas, but Meinert’s description applies so closely 
to it that in all probability it was taken from an example of the same species. 
S. nigro-vittata may be at once separated from S. lincect by the marked difference 
in colour. Apart from this, however, the head and tergites are very differently 
