CHARLES ROTHSCHILD, SIPHONAPTERA. 7 



The occiput measured dorsally is three times as long as the 

 width of the helmet inclusive of the comb measured from 

 the apex of the fourth spine to the anterior edge of the hel- 

 met. Second and third segments of the maxillary palpus 

 equal in length; end-segment of the proboscis one third larg- 

 er than it is broad. 



Thorax. The pronotum bears two rows of bristles, the 

 meso- and metanotum each three rows. 



Ahdomen. There are twö rows of bristles on the abdo- 

 minal tergites, the anterior row not reaching down to the 

 stigma; the basal sternite with two ventral bristles placed 



Fig. 5. Stephanocircus concinnus spec. nov. 



one behind the other, but no lateral ones, sternites III to VI 

 with a row of 3 or 4 bristles on each side and a smaller 

 bristle in front of the row, sternite VII having a row of three 

 bristles, and VIII two large bristles and ventrally one or 

 two smaller ones. The eigth tergite bears no bristles either 

 above or below the stigma. Of the three ante-pygidial brist- 

 les the upper one is quite small, and the lower bristle a 

 little över half the length of the middle one. 



Legs. The outer surface of the hind femur bears two 

 lateral bristles near the base and three subventral ones near 

 the apex. The före femur has one or two lateral bristles 

 on the outer surface. The arrangement of the bristles on 

 the outer side of the tibiae is the same as in S. simso-ni, 



