1911] Ewing — Predaceous and Parasitic Acarina 43 



of the abdomen each about half as long as the shoulder bristles; two long 

 pairs of bristles are found situated at the tip of the abdomen. 



Legs of the anterior group subequal, apophyses well developed. Legs of 

 the posterior group longer than those of the anterior group; those of the 

 fourth pair extending beyond the posterior margin of the abdomen by one- 

 third their length. 



On red winged blackbird, Ageliaus phosniceus. Described 

 from several specimens taken from blackbird skins in the Iowa 

 State College Museum. 



Explanation of Plate 7. 



From photomicrographs by the writer. 



Fig. 1 — Analges passerinus Linn.? dorsal view of male, X 75. 

 Fig. 2 — Stigmaeodes cinctus sp. nov. dorsal view showing marked constriction 

 of the body, X 75. 



Fig. 3 — -Alloptes longipes sp. nov. dorsal view of male, X 45. 

 Fig. 4 — Harpyrhynchus brevis sp. nov. dorsal view, X 75. 



