THE GENKKA AND SPEOIKS OF SYMFHYLA. 83 



are clothed with a moderate number of seta), of which 

 six or seven on the lower half of the outer surface, and 

 especially at the lower margin, are strongly protruding, and 

 about two thirds as long as the depth of the cerci, while all 

 the others are rather depressed and considerably or much 

 shorter. The terminal area about two thirds as long- as the 

 depth of the cerci and looking downwards; the surface above 

 it of medium length, with seven or eight very pronounced 

 lines. The apical seta is a little shorter than the area. 



Length. — The largest of the specimens measures 3 mm. 



Locality. — Eio Catouche, near Caracas (Venezuela), July 

 9th or 10th, 1892 (Dr. F. Meinert). 



Remarks. — This species is rather closely allied to the 

 European S. vulgaris, but is easily distinguished by the 

 second scutum, the processes of which are considerably larger 

 and much closer to each other than in S. vulgaris; besides, 

 its setse are conspicuously longer. The third scutum presents 

 also good differences, and the antennas, legs, and cerci present 

 additional characters of less importance. 



9. Scolopendrella simplex, n. sp. PI. 7, figs. 3 a — 3 e. 



Material. — Nine specimens, most of them with the full 

 number of legs, and all from one locality. 



Head. — Moderately long, scarcely one fourth longer than 

 broad. The central rod is interrupted at the middle, without 

 lateral branches, the anterior part is moderately narrow, and 

 the frontal branches very thin. 



Antennae. — They contain from eighteen to twenty-two 

 joints. The setas in the central whorls are naked, slender 

 and tapering from the base, moderately or rather long on the 

 proximal joints, and somewhat shorter on the distal ones. 

 The setae on the inner side of the joints in the proximal half 

 of the antennae are longer than those on the outer side, in 

 large specimens more or less vertical to the longitudinal axis, 

 and especially on the third to the fifth or sixth joint they are 

 elongate, nearly twice as long as on the outer side. A little 



