21 



longiore, processu trianyulari brevi armato, appendicibus an- 

 tenniformibus along atisfilif or mibus ; front e prolong ato, acumi- 

 nato ; ovario externa conico. 



Long, maris 1 poll., foeminse circa 14 lin. 



Branchipus torvicornis, Waga, Ann. Soc. Ent. de France, xi. 261. 

 t. 11. f. 1-4. 



Hab. In vicinitate urbis ""Warsaw ; " Krynicki. 



This species, which was discovered by M. Krynicki in a muddy 

 stagnant piece of water near the town of Warsaw, is upwards of an 

 inch in length, the female being longer than the male. The inferior 

 antennae or cephalic horns of the male are very large, when extended 

 equalling in length the whole body. The basal joint is strong, and 

 broad at its junction with tlie head ; the second is short, and the third 

 is divided at the apex into two branches, which are long, slender and 

 serrated on their inner edges, the internal one being the longer, bent 

 into the form of a hook, and having on its external edge a process of 

 a triangular form and acuminated at the point. The first and second 

 joints are armed with several minute teeth, and the antenniform ap- 

 pendages are straight, slender, but somewhat stouter than the supe- 

 rior antennae. The front of the head is prolonged into a prominence 

 which is pointed. The inferior antennae in the female are flat, and 

 obtusely rounded at the extremity. The ovarian bag is conical in 

 shape and of a blue colour. The caudal fins are of considerable size 

 and plumose on their edges. 



2. Streptocephalxis cafer, Loven. Antennis inferioribus 

 maris longis, artieulo basalt intus appendice lacinulata brevi 

 prcedito, ramo terminali interno longo, flexuoso, inermi ; /rente 

 prolongate, in rostrum lunatum producto ; ovario externo cali- 

 gceformi. 



Long. 15 millim. 



Branchipus cafer, Loven, Kongl. Wet. Akad. Handl. 1845, 433. 

 t. 5. f. 1-20. 



Hab. In paludibus terrae Cafrorum Natalensium ; Wahlberg. 



This species was discovered by M. Wahlberg in some pools of 

 fresh water in Port Natal, and is about 15 millimetres in length. The 

 inferior antennae or cephalic horns in the male are long stout organs 

 and flexuose in shape. The basal joint is rather short, rounded, and 

 is furnished at its base on the internal edge with a short appendage 

 of a laiiceolate form and toothed on its edge externally. The third 

 joint divides at the apex into two branches, the internal one being 

 long, slender and flexuose, the external being club-shaped and forked 

 at the extremity, dividing into two other slender branches of unequal 

 length. The antenniform appendages are filiform and flexuose. The 

 front of the head is prolonged into a narrow deflected beak, which is 

 forked at its extremity. The male organs are long and slender ; they 

 are composed of four articulations, the last of which is much the 

 longest, is curved, and armed on each side with a numerous row of 

 teeth and spines. 



In the female the cephaUc horns are broad, thick, and furnished 



