52 ON THE CHILOPODA OF NORTH AMERICA. 



S. filicornis, n. sp. — S. brunnea, eorpore robusto, antice modiee valde et postice abrupte angustato; 

 superfioie dorsali lineis duobusi subapproximatis obscuris, pallis 3 segmento cepbalico breve, subtrian- 

 gulare, obscure minute albomaculato ; antennis modiee longis, filiformibus, partial subpubeseentibus, 

 baud sensim acuniinatis ; labio breve, convexo, antice leviter l^e emarginato ; inandibulis haud dcftti- 

 culatis ; scutis sulcis duobus, obscuris, subapproximatis et suTOris scuto-episcutalibus impressis ; pedi- 

 bus brevibus, gracilibus, utrinque 81, pari postremo parvo; sternis suturis sterno-episternalibus et aut 

 sulco mediano aut depressione centrali impressis. 



The whitish dots on the head are very minute as well as obscure. Many of the 

 scuta are quite rough ; the two lines are more separate and distinct on the posterior 

 ones, and correspond with the sulci in position. The sterna", besides the sterno-epis- 

 ternal sutures, have a central round impression, occasionally replaced by a longi- 

 tudinal median sulcus. 



238 J 1 I Near La Union, Costa Rica. | Lieut. D. D. Porter, U. S. N. | | Unc. 3 | 



