8 University of Michigan 



Siphonophora corynetes, sp. nov. 



PI. 2, Fig. 16; PL 3, Figs. 17-20 



General color fulvous of ferruginous cast. 



Head rather strongly narrowed forward from base, nar- 

 row in front of base of antennae. Beak straight, or nearly so. 

 Antennae heavy, conspicuously enlarged distad of middle. 

 (PI. 3, Fig. 17.) 



Collum of very characteristic form, the lateral margins 

 short, the anterolateral corners oblique and excavated, the 

 anterior margin between them strongly bowed forward and 

 mesally excised. (PI. 3, Fig. 17.) 



Body not keeled, the pores not elevated, or but weakly so, 

 more especially on some posterior segments, the dorsum being 

 evenly convex. 



Pleurites of anterior segments as shown in PI. 2, Fig. 16. 

 Those of posterior segments as shown in PI. 3, Fig. 18. 



Posterior gonopods of males erect, much exceeding the 

 anterior pair in length ; tip rather simple, spine at base of style 

 abortive. (PI. 3, Fig. 20.) Anterior gonopods as shown in 

 PI. 3, Fig. 19. 



Number of segments of male type, 59. 



Length, al)out 14 mm. ; width, i mm. 



British Guiana: First Mourie ; Aug. 26, 1914. Under fallen 

 leaves in a tree clump. One male. Holotype, M. C. Z., 5,051. 



Siphonophora relicta, sp. nov. 

 PI. 3, Fig.s. 21-23; PI- 4.- Fig. 24 



Dusky brown above, with lower border of sides, all of last 

 few tergites and the head a paler, fulvoferruginous color. 

 Venter and legs fulvous. 



This species is separable from corynetes by the character- 



