ART. 8. MIIxLIPEDS OF CENTRAL AMERICA — CHAMBERL.IN. 17 



crossed bj^ fine and well separated ridges or ribs. Dorsal surface be- 

 hind the sulcus densely punctate, in part with an obscure network 

 of obsolete fine ridges. Longitudinal striae on metazonite begin just 

 below the pore, the two or three uppermost of these on segments in 

 middle region being short, the others complete. Dorsum in front of 

 sulcus more finely punctate, the punctae disappearing anteriorly. 

 Pores beginning on sixth segment, each well removed from the sul- 

 cus. Last tergite obtuse and rounded caudallj^ exceeded by the 

 valves, densely finely punctate. Valves with mesal margins moder- 

 ately compressed and elevated. Anal scale triangular, wider than 

 long, the caudal angle rounded. 



Gonopods as shown in plate 8, figures 6 and 7. 



Number of segments in male, 63. 



Length, about 67 mm.; width, 4.5 mm. 



Localities. — Guatemala: Coban-Tache (type locality), two males 

 and a female, May, 1904 ; Coban, coffee plantation, two males and a 

 female. May, 1904; Sepaiuite, one female. May, 1904; Secanquim, 

 several females of mostl}^ larger size (G. P. Goll, December, 1905) ; 

 Joyabaj, several males and females. May, 1906; Trece Aguas, one 

 male, June, 1907. 



Type.— C^t. No. 828, U.S.N.M. 



32. ORTHOPORUS CONFRAGOSUS (Karsch). 



Spirostreptua confragosus Kabsch, Zeits. Ges. Naturw., 1881, ser. 3, vol. 6, 



p. 44. 

 Spirostreptus {ScapMostreptus) confragosus Bkolemann, Auu. Soc. Eut. 



France, 1905, vol 74, p. 367, pi. 9, fig. 20; pi. 10, fig. 21. 

 Orihovorns confragosus Pocock, Biol. Centr.-Amer., Diplop., 1909, p. 101. 



Locality. — Costa Eica: San Jose. 



33. ORTHOPORUS FESTAE (Silvestri). 



Plusioporus festac Sil\'estei, Boll. Mils. Torino, 1896, vol. 11, No. 254, p. 3. 

 Orthoporus festae Pocock, Biol. Centr.-Araer., Diplop., 1909, p. 102. 



Locality. — Panama : Isthmus of Darien, Punta Sabana. 



34. ORTHOPORUS RODRIQUKZI (Brolemann) . 



Spirostreptus rodriguesi Brolemann, Mem. Soc. Zool. France, 1900, vol. 13, 



p. 104, pi. 6, fig. 47 ; pi. 7, fig. 58. 

 Orthoporus rodriguesi Pocock, Biol. Centr.-Amer., Diplop., 1909, p. 103. 



Locality. — Guatemala. 



35. ORTHOPORUS RODRIQUEZI CORIACEUS (Brolemann). 



Spirostreptus rodriguezi coriacews Bbolemann, M6m. Soc. Zool. France, 



1900, vol. 13, p. 106. 

 Orthoporus rodriguesi, var. coriaceus Pocock, Biol. Centr.-Amer., Diplop., 



1909, p. 103. 



Locality. — Guatemala. 



