288 



SIPHONAPTERA. 



ventrally two long bristles, accompanied in one of the two cf 

 before us by a small bristle. Eighth sternite (viii. st.) 

 with a short narrow 

 manubrium directed up- 

 ward , one on each side ; 

 from this vertical portion 

 distad the segment is 

 for a short distance 

 narrow and undivided, 

 then divided into two 

 ovate-lanceolate lobes, 

 one on each side, which 

 distal ly become mem- 

 branous, and bear 

 proximally a small ven- 

 tral bristle each ; the 

 margins are entire, not 

 fringed. As in G. levis 

 J. &K. (1922), the ninth 

 tergite (fig. 2, ix. t.) 

 dorsally much less pro- 

 duced cephalad than in 

 C. idoneus, C. hastatus, 

 G. fimhriatus, etc. The 

 manubrium (M) without 

 hump dorsally at the 

 base ; the non-movable 

 process P of the clasper 

 (CE) twice as long as 

 broad ; its apex rounded 

 on the anterior side, 

 whereas the posterior 



apical angle projects as a short nose ; the two acetabular bristles, 

 slender and moderately long, close together on a slight pro- 

 jection at the ventral distal angle of the clasper ; from this point 

 frontad the body of the clasper widens and then its margin 

 quite abruptly turns dorsad. The movable exopodite F widest 

 apically, narrowest at the base, its dorsal frontal angle about 

 90°, with the tip produced into a short projection, the apical 

 distal margin rounded, with the ventral angle widened down- 

 ward as a short lobe ; the exopodite bears six large spiniform 

 bristles, two being placed above the middle of the posterior 



