8 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol.60. 



Antennae clavate. Colliim with sides nearly straight, converging 

 cephalad. Anterior margin widely incurved, not straight, as rep- 

 resented for glohiceps, as shown in the figure. Anterior and pos- 

 terior pleurites as shown in plate 2, figures 7 and 8. 



Number of segments, female, 94. 



Length, 25 mm. 



Locality. — Honduras: Tela, one female (W. M. Mann). 



Type.—C&i. No. 816, U.S.N.M. 



13. SIPHONOPHORA FALLENS, new species. 



Plate 3, figs. 1-4. 



Yellow, with a series of small, lighter spots along the side. Head 

 subglobose, with beak very short, as in S. glohiceps. The antennae 

 are more evenly clavate than in the latter species, the sixth article 

 thickest, whereas in the other form the antenna is of nearly uniform 

 width over middle and distal sections; rather abruptly much thicker 

 than at base (see pi. 3, fig. 1). Anterior margin of collum widely 

 and not deeply concave, as shown in the figure. Pleurites of anterior 

 and posterior regions as shown in plate 3, figures 2 and 3. 



Gonopods as represented in plate 3, figure 4. 



Number of segments, male, 65 to 60. 



Length, 15 mm. 



Locality, — Guatemala: Joyabaj-Chiche, six specimens (O. F. Cook, 

 May. 1906). 



Type.— CB^t. No. 817, U.S.N.M. 



A much smaller species than S. glohiceps, differing in form of 

 antennae, as well as in gonopods, etc. 



14. SIPHONOPHORA GLOBICEPS Pccock. 



Siphonophora glohiceps Pocock, Biol. Centr.-Amer., Diplop., 1903, p. 41, pi. 

 5, figs. 6-6a. 



Locality. — Guatemala: Purula, Santa Rosa, five specimens (O. F. 

 Cook, May, 1906). 



These specimens agree with the original description and figures 

 as to form of head, beak, and antennae. They are, however, 

 decidedly broader in proportion to length. The largest specimen 

 is 34 mm. long and 2 mm. wide, while a specimen 18 mm. long 

 is 1.2 mm. wide. Pocock gives his type as 21 mm. long and 1 mm. 

 wide. The specimens in hand are also much darker in color — dusky 

 brown. However, since Pocock had but a single specimen and the 

 present ones are from the same locality as his, I believe there is 

 scarcely room for doubt that they represent the same species. 



