16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



30. ORTHOPORUS DISCRIMINANS, new species. 



Plate 8, figs. 1-4. 



Body with the usual alternating bands, these of bluish tinge and 

 brown or ferruginous, the bands of latter color about caudal region 

 of segments. Legs reddish brown. Sulcus on head present only 

 across vertex, weak, its anterior end lying in a depression. Head 

 smooth. Eyes their longer diameter apart. Collum not inflexed be- 

 low, the lower end on each side of the usual general form. Above 

 margining sulcus three deep sulci limited each by a ridge below it 

 (pi. 8, fig. 1). Segments in general minutely punctate in front of 

 segmental sulcus dorsally, behind sulcus more coarsely punctate 

 and with anastamosing rugae, particularly on more posterior por- 

 tions, these fading out toward sulcus. The rugae less sharply de- 

 fined than in, for example, laetus. Striate below level of pore, with 

 the uppermost striae short and weaker. Anal tergite not covering 

 the valves, rounded caudally; crossed in front of caudal end by a 

 transverse depression or furrow; surface densely punctate, also 

 with a network of weak, fine rugae. Valves punctate. Anal ster- 

 nite broadly triangular, the apical angle obtuse (pi. 8, fig. 2). 



Gonopods of male as shown in plate 8, figures 3 and 4. 



Number of segments, near 56. 



Length, about 65 mm. ; width, 4 mm. 



Locality. — Guatemala: Pancajche, one male, June, 1904. 



7Vpe.— Cat. No. 827, U.S.N.M. 



Characterized by sculpturing and particularly by the form of the 

 gonopods, the large process at distal end of the anterior pair extend- 

 ing cephalad of ectad across telopodite of posterior pair being a 

 readily noted distinctive feature. 



31. ORTHOPORUS COBANUS, new species. 



Plate 8, figs. 5-7. 



Segments each of a somewhat bluish brown color anteriorly and 

 with a caudal, rather broad band of more reddish brown or ferrugi- 

 nous color, or sometimes fulvous, this caudal band often also en- 

 croaching on the prozonite of succeeding segment. Anal segment 

 dark. Legs dark reddish brown. Head smooth. Sulcus present 

 only on vertex, rather weak. The eyes small and widely separated, 

 being twice their diameter apart. Ocelli in five series, as 9, 8, 7, 5, 2. 

 Collum truncate at each end below, both the anterior and the poste- 

 rior angles obtuse, the latter the more rounded. Above lower mar- 

 gin three long striae curving upward anteriorly and, typically, a 

 short one above and one below the lowermost of these (pi. 8, fig. 5). 

 Sulcus of segments deeply impressed throughout, over dorsum 



