378 



BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



Distribution. — Lake Maxinkuckee, Lake Winona, Ind. (Wilson) ; 

 Canadian lakes and ponds (Wright) ; Mississippi River at Fairport, 

 Iowa, Lake Erie (Wilson). 



Color. — Body a clear cartilage color, translucent in young females, 

 opaque in adults; ovaries and oviducts opaque white. Eggs white 

 when first extruded, but acquiring blue pigment gradually until 

 when ready to hatch the entire ovisacs appear blue. Eye red or 

 reddish. 



Female. — Head fused with first segment, the two four-fifths of 

 the body length and covering the rest of the metasome in dorsal 

 view; fifth segment very short and narrow; urosome one-fourth as 

 long as metasome; genital segment barrel-shaped; caudal rami as 

 long as anal segment. Basal segment of second antenna swollen to 

 twice the diameter of the second segment, the apical claw with a 



FiGUKB 232. — Ergasilus centrarchidarum: 

 a. Female, dorsal ; b, female, fourth 

 leg 



FiGDRB 233. — Ergasilus funduli: a. Fe- 

 male, lateral (after Kr0yer) ; 6_, fe- 

 male, second antenna 



smooth inner margin. Exopod of fourth leg 3-segmented; each 

 fifth leg lacking but replaced by a single seta. Total length, 

 0.8-0.9 mm. 



Male. — Unknown. 



Remarks. — This is almost entirely a fresh-water species, and, as 

 its name implies, it infests practically every species of fish belonging 

 to the family Centrarchidae. 



ERGASILUS FUNDULI Krf(yer 



FlQUBB 233 



Ergasilus funduli Kr0yer, Naturh. Tidsskrift, ser. 3, vol. 2, p. 228, pi. 11, 

 1863.— Wilson, Proc. U. S. Nat. Mus., vol. 39, p. 328, 1911. 



Occurrence. — Found very rarely on the common mummichog 

 (Fundulus heteroclitus) . 

 Distribution. — New Orleans, La. (Kr0yer). 

 Color. — Unknown. 



