CHAMBERLIN: THE CHILOPODA OF BRAZIL. 159 
Antennae composed of seventeen articles as usual. Densely 
clothed, with fine short hairs but these becoming longer and much 
sparser proximad. 
Prosternum rather widely though but moderately depressed along 
the median longitudinal line. Anterior margin moderately extended 
~ cephalad, though less so than in breviwnguis; margin each side of the 
narrow median incision broadly semicircular or with edges from 
rounded ectal ends to mesal incision substraight, the two sides 
meeting at an obtuse re-entrant angle; no distinct semilunar dental 
plates are present though there is a suggestion of the separation of 
the smooth, rounded, marginal portion suggestive of the condition in 
weber. 
First dorsal plate long; smooth; without furrows or with but very 
faint and short traces of a longitudinal pair toward anterior end. Sub- 
median paired longitudinal sulci present on other dorsal plates from 
the second to the penult as are also the curved lateral sulci, the latter 
being sharply impressed excepting on the first few plates, where they 
are faint. Last dorsal plate with caudal produced border subtriangu- 
Jar, the median angle somewhat obtuse with the margin each side also 
forming a slight, very obtuse, angle near middle of its length. Plate 
with a very deep median longitudinal sulcus. 
The ventral plates show a somewhat semicircular transverse im- 
pression in front of the level of the legs and a second transverse 
impression a little caudad of the legs, but not truely cruciform 
impression is indicated in the type. Last ventral plate with sides 
nearly straight, these converging to the semicircular caudal border. 
Spiracles longitudinally elliptic. | 
Tarsi of anterior legs undivided. Legs clothed with sparse stiff 
bristles, these more spinescent on more caudal pairs. Prefemur of 
anal legs clothed with numerous long spines excepting dorsally and on 
median portion of ectal surface where they afte replaced with fine hairs. 
Femur armed with similar or slightly more slender spines which are 
confined, however, more nearly to the strictly ventral surface; with- 
out teeth. Tibia without spines but bearing ventrally a longitudinal 
series of four teeth, these teeth curving caudad at distal ends. First 
tarsal joint with a single tooth at proximal end on ventral surface. 
Second tarsal joint without true teeth; but on ventral surface at proxi- 
mal end it is extended into a conspicuous rounded process. 
Length cir. 16 mm. 
Locality.— British Guiana. One specimen taken at Washington, 
D. C., in pots of plants imported from British Guiana. 
