THE MYRIAPODA OF NORTH AMERICA. 115 



Slender; smooth, very lightly punctate. 



Head suboval, punctate; sulci absent. 



Antenna? 25-29-joiuted, long, basal not very crassate, the hrst 3 or 4 

 smooth. 



Prosterual teeth 4-f 4, inner coalesced; coxal tooth large, inner mar- 

 gin unarmed. 



The first 15 dorsal plates iinmargiuate; sulci well developed, and 

 commencing at transverse suture of first plate and dividing them into 

 three planes. 



Sulci of ventral plates shallow, last plate short and wide, sides con- 

 verging, rounded, posterior margin emarginate. 



Second tarsal joints of all legs, except anal, armed. 



Anal pair of legs slender, as in hcros; spines very small; 8-12, in 3 

 or 4 vseries on the superior-interior surface ; 4 or 5 in 2 series ou the 

 inner surface; beueath 10-12 in 2 or 3 series; apical process large and 

 blunt, armed with 9- LI small spines. 



Posterior plenne narrow;, apex long, armed with 7-9 spines, posterior 

 margin concave; a marginal spine. 



Length, 75 mm . 



Described from one specimen of which the anal pair of legs is broken 

 off. 



This new species is separated from heros, pachypus, nicaragttensis, and 

 viridis by the large number of spines of apical process of femora and 

 the well-marked sulci of first dorsal plate. 



6. Scolopendra galapagoensis, sp. nov. 



Diagnosis. — Related to Scolopendra viridicornis Newport, but the 

 spines of apical process of femora of anal legs, 6-8; spines of apex of 

 posterior pleura?, 9-12 ; spines of femora of 2-20 pairs of legs, 4 or 5. 



Type. — No. 594. 



Habitat. — Chatham, James, and Albemarle Islands, Galapagos Ar- 

 chipelago. 



Description. — Very dark brown, more yellowish posteriorly; under 

 parts more brown than upper; the first five or six antenna! joints dark 

 blue, rest rusty; tarsi brownish, rest of legs bluish brown, except base 

 of femora, which is more brown, like ventral plates; posterior pleura? 

 and femora of anal legs reddish brown. 



Robust, smooth, all parts very slightly punctate. 



Head suboval; two longitudinal sulci, which break up posteriorly, 

 and send a branch along lateral margin. 



Antennae long. 17-jointed, articles long, basal subcrassate, the first 

 four or five not hirsute. 



Prosternal teeth 3+3, large, inner coalesced: a transverse sulcus 

 along anterior part of sternum. 



The first four dorsal plates immargiuate; posterior borders trans- 

 versely wrinkled; crest of aual segment weak, only extending three- 

 fourths of the way. 



