ciiamberlin: the ciiilopoda of bhazil. 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 l)ut moderately depressed along 

 the median longitudinal line. Anterior margin moderately extended 

 cephalad, though less so than in hreviunguis; 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 

 weberi. 



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, Avhere they 

 are faint. Last dorsal plate with caudal produced border subtriangu- 

 lar, 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 are 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. 



