ABT. 8. MTLLIPEDS OF (JENTRAL AMP^EICA CHAMBEKLIX. 11 



19. PROSTEMMIULUS COOKI. new species. 



Plate 5, figs. 5-12. 



Bod}' in general dark brown or fuscous. A narrow, median, 

 longitudinal stripe of fulvous or light orange color, the stripe con- 

 stricted over the anterior portion of each segment. Collum and last 

 segment also light orange in color, as is the lower part of face. 

 Head with two ocelli on each side, of which the anterior is the 

 smaller, as usual, but i-elatively larger than in, for example, the 

 Costa Rican P. picadol Silvestri (pi. 5, fig. 5). Antenna long 

 and slender, the sixth joint about twice as long as thick. Collum 

 typically with four longitudinal, deep striae on each side or with 

 two complete and several shorter ones (see pi. 5, fig. 5). Second 

 tergite deeply striate beneath, the striae on succeeding segments more 

 numerous and extending farther dorsad, but in no case present in 

 the median dorsal region. 



The legs of first, second, and third pairs of the male as shown in 

 plate 5, figures 6 to 8 ; leg of seventh segment in plate 6, figure 12. 



Sternites as shown in plate 5, figures 9, 10. 



Gonopods of male as represented in plate 5, figure 11. 



Number of segments, 46 to 51. 



Length, 28 mm. ; width, 2 mm. 



Locality. — Guatemala: Joyabaj, several males and females (O. F. 

 Cook, May. 1906). 



Type.— C^i. No. 821, U.S.N.M. 



20. PROSTEMMIULUS TRISTANI Silrestri. 



Prostemmiulus tristani Silv'estri, Boll. I.ab. Zool. Portici, 1916, vol. 10, 

 p. 326, figs. XXXIV, 1-14. 



Locality. — Costa Rica : La Estrella. 



21. PROSTEMMIULUS PICADOI Silvestri. 



Prostetiimiuhis picadoi Silvestri. Boll. Lab. Zool. Portici, 1916, vol. 10, p. 

 327, figs. XXXV, 1-4. 



Locality. — Costa Rica: La Estrella. 



Superfamily CHORDEUMOIDEA. 



Family CRASPEDOSOMIDAE. 

 Genus CLEIDOGONA Cook and Collins. 



22. CLETOGGONA CEIBANA, new species. 



Plate 6, figs. 1-6. 



Lower part of sides, venter, and legs pale fulvous, the legs dark- 

 ened distally. Upper part of sides and dorsum brown, with a series 

 of paler areolated spots along each side. Upper part of head and 



