NO. 17S8. NORTH AMERICAN ERGASILID^— WILSON. 395 



1908. Wilson, Chas. B. North American Parasitic Copepods; List of those found 

 upon the Fishes of the Pacific Coast, with descriptions of new Genera and 

 Species. Proc. U. S. Nat. Mus., vol. 35, pp. 431-481, pis. 66-83. 



1882. Wright, R. Ramsey. Notes on American Parasitic Copepoda. Proc. Canadian 

 Inet. (n. s.), vol. 1, pp. 243-254, pis. 1 and 2. 



EXPLANATION OF PLATES. 



Plate 41. 



Female of Ergasilus labrads Kroyer. 



Fig. 42, dorsal view. Fig. 43, ventral view showing pigment pattern. Fig. 44, genital 

 segment and abdomen, dorsal view. Fig. 45, second antenna. Fig. 46, mouth- 

 parts; lb., labium; md., mandible; mdp., mandibular palp; mx^., first maxilla; 

 mx^\, second maxilla. Figs. 47 to 49, first, third, and fourth swimming legs. 



Plate 42. 



Female of Ergasilus centrarchidarum Wright. 



Fig. 50, dorsal view. Fig. 51, dorsal surface of second (really the third) thorax seg- 

 ment. Fig. 52, side view of mouth-parts, showing protrusion of first max- 

 illae. Figs. 53 and 54, diagonal views of the mouth-parts. Figs. 55 to 58, first, 

 second, third, and fourth swimming legs. Fig. 59, spermatozoan, highly mag- 

 nified. 



Plate 43. 



Female of Ergasilus cseruleus, new species. 



Fig. 60, dorsal view. Fig. 61, ventral view, showing distribution of the deep blue 

 pigment. Figs. 62 and 63, first and second antenna. Fig. 64, mouth-parts; 

 7n(Z., mandible; TOC?p., mandibular palp; ma/, and ma/^., first and second maxillae. 

 Figs. 65 to 68, first, second, third, and fourth swimming legs. 



Plate 44. 



Female of Ergasilus manicatus, new species. 



Fig. 69, dorsal view. Fig. 70, genital segment and abdomen, dorsal view. Fig. 71, 

 first antenna. Fig. 72, one of the peculiar second antennae, furnished with large 

 sleeves or hoods at the joints. Fig. 73, mouth-parts; md., mandible; mdp., 

 mandibular palp; ma/, and mx^\, first and second maxillae. Figs. 74 to 77, first, 

 second, third, and foiu-th swimming legs. All the figures except 69 and 72 were 

 drawn by Richard Rathbun. 



Plate 45. 



Female of Ergasilus versicolor, new species. 



Figs. 78 and 79, dorsal and ventral views, showing the distribution of pigment. Fig. 

 80, first antenna. Fig. 81, mouth-parts (see fig. 46). Figs. 82 to 85, first, second, 

 third, and fourth swimming legs. 



Plate 46. 



Male of Ergasilus chautauquamsis Fellows. 



Fig. 86, dorsal view. Fig. 87, ventral view of abdomen, showing armature of species. 

 Fig. 88, second antenna. Fig. 89, mouth-parts (see fig. 46). Fig. 90, exopod of 

 first swimming leg, left side. Fig. 91, endopod of first swimming leg, right side. 

 Figs. 92 to 94, second, third, and fourth swimming legs. 



