No. 2104. NORTH AMERICAN PARASITIC COPEPOnS— WILSON. 101 



I'fjpe of the genus. — llaemobapholdes ambiguus (T. Scott), mono- 

 iyi>ic. 



(HaemohapTioides, Haemobaphes and the ending elSos denoting 

 likeness). 



Remarks. — T. and A. Scott established this new genus in 1913 for 

 the species which T. Scott had described in 1900 as Ilaejnohaphes 

 amMguus. It certainly seems to be a distinct genus, but it is unfor- 

 tunate that neither in the original description nor in the new genus 

 diagnosis are any of the appendages even mentioned. The internal 

 anatomy is probably very similar to that of Uaemdhaphes and this 

 makes the lack of external detail all the more regrettable. 



TRIFUR, new genus. 



External generic characters of female. — Cephalothorax enlarged 

 nearly at right angles to the neck, and armed with a dorsal posterior 

 median liorn and two shorter conical lateral horns. Neck moderately 

 thick, completely chitinized, and three times the length of the trunk, 

 curved but not flexed, and smooth. Trunk only slightly swollen, bent 

 into a sigmoid curve at right angles to the curve of the neck, the 

 ventral surface on the convex side, with a pair of short and wide 

 fleshy processes over the bases of the 2gg strings. Abdomen slender, 

 half as long as the genital segment, and continuing the S-curve, des- 

 titute of processes; e.gg strips coiled into tiglit spirals, which are 

 one-half longer than the abdomen ; eggs uniseriate and flattened into 

 thin disks. 



Two pairs of antennae, second pair chelate; four pairs of swim- 

 ming legs, two pairs close together just above the base of the cephalo- 

 thorax, the others removed to some distance on the neck itself. 



Internal generic characters of female. — Digestive tube occupying 

 the center of the neck, the dorsal portion of the genital segment, and 

 the center of the abdomen, abruptly contracted into a short rectum. 

 Ovaries paired on the dorsal surface of the digestive tube at the 

 anterior end of the trunk; oviducts running forward a long distance 

 into the neck on the dorsal surface, then curved around the outside 

 of the intestine to the ventral surface, following the ventral curve 

 of the genital segment for half its length, then rising gradually to 

 the center of the lateral surface. 



Cement glands on the lateral surface of the genital .segment at its 

 anterior end and dorsal to the &gg strings, running this way for 

 half the length of the segment, then curving around outside of the 

 ^gg strings to the ventral surface of the latter and following that 

 surface back to the vulvae. The transition from gland to duct oc- 

 curs just where it curves around the outside of the egg string. Chiti- 



