2,0 NORTH AMERICAN ANOPLURA 



angle. First pair of legs small with slender claw, second and third pairs 

 much larger than the first, nearly equal to each other, with broad claw. 

 Sternal plate hexagonal, the anterior margin slightly the longest, the 

 others nearly equal. All the pairs of coxae widely separated. 



Abdomen large, elongated oval, without chitinized tergites and 

 sternites, having everywhere a reticulated appearance, the divisions be- 

 tween the segments poorly defined. First segment very small and nar- 

 row, with one row of four hairs ; second segment with two rows of hairs, 

 the first of six, the second of eight ; third to seventh segments each with 

 one row of eight hairs ; eighth with six, of which the median pair is 

 longer than the others ; ninth with none. Second to seventh segments 

 each with a pair of hairs on each side close to the lateral margin. 



Pleurites present on the third to sixth segments, very small, tooth- 

 like, with the base attached to the body and the point free. Each with a 

 single long hair on the posterior margin. 



On the ventral side, segment one apparently with no hairs ; segments 

 two to five each with one row of six ; six and seven each with one row 

 of four. All except the first and ninth with two hairs near each lateral 

 margin. Genital plate very poorly defined; gonapods small and bearing 

 four or five small spines in a row on the posterior margin; just caudad 

 of each gonapod a group of one large and several small hairs. Vulva 

 fringed. 



Haemodipsus parvus n. sp. 



Plate II, fig. 4; plate IV, fig. 6; text fig. 12. 



Five females from a vizcacha, Lagidium peruani, taken in Peru 



Q 



Fig. 12. — Haemodipsus parvus n. sp. ; pleural plates of female. 



