28 PROCEEDIITGS OF THE NATIONAL MUSEUM. vou. 60. 



sharply differentiated and elevated, subvertically wrinkled or fur- 

 rowed over middle portion (pi. 11, fig. 8). 



Anal scale is shown in plate 11, figure 9. 



Gonopods as represented in plate 11, figures 11 and 12. 



Number of segments, 50. 



Length, about 50 mm. ; width, 4 mm. 



Locality. — Guatemala: Cacao, two males (O. F. Cook, April, 1906). 



Type.— C'At. No. 834, U.S.N.M. 



67. OXYPYGE CONPUSA, new species. 



Plate 12, figs. 1, 2. 



Coloration as described for ferruginipes^ but with the ferruginous 

 bands of the segments beneath apparently more pronounced. 



The structure throughout closely approximating that of the preced- 

 ing species. The two forms are most readily to be distinguished from 

 each other by differences in the scobina. On a segment of the middle 

 region the scobina are farther removed from the anterior margin, and 

 the anterior impressions are much narrower and more strongly curved, 

 the ends more reflexed, and the area they limit much less narrowly 

 elliptic in the present species than in ferrugiiiipes. They are about 

 twice their diameter apart (see pi. 12, fig. 1). The anal tergite and 

 valves are similar, but the valves are less compressed, the border le^ 

 elevated and less sharply set off, and they are wholly smooth, whereas 

 in ferniginipes each one is conspicuously subvertically wrinkled 

 across its middle region. 



Unfortunately the posterior gonopods have been broken off in the 

 type. The median plate of the anterior gonopods, etc., is shown in 

 plate 12, figure 2. 



Number of segments, 56. 



Length, about 58 mm, ; width, 5 mm. 



Locality. — Guatemala: Cacao, one male (O, F. Cook, April, 1906). 



Type.—Q^i. No. 835, U.S.N.M. 



68. OXYPYGE SOCIA, new species. 



Plate 12, figs. 3-6. 



This form is also black above, but the dark color covering entire 

 segment excepting a narrow plate caudal border. Below the pore the 

 dark color does not extend caudad of the suture, the posterior portion 

 being brown or fulvous. Anal valves dusky fulvous, lighter on 

 caudal borders. Legs lighter fulvous or a little ferruginous. Head 

 smooth. Sulcus widely interrupted in the middle. Antennae with 

 four sensory cones. Ocelli in a subcircular patch, as in the preceding 

 species. CoUum evenly rounded below, on each side a short longi- 

 tudinal sulcus just above lower margin, this at anterior corner, not 



