DESCRIPTION OF A NEW SPECIES OF EUBRANCHIPUS 
FROM WISCONSIN WITH OBSERVATIONS 
ON ITS REACTION TO LIGHT. 
S. J. HOLMES. 
Eubranchipus ornatus sp. nov. 
Male: Antennae slender, extending considerably beyond the 
eyes. Frontal appendages irregularly oval, resembling those 
of E. serratus Forbes, the inner margin convex and dentate ex¬ 
cept on the proximal fourth, the teeth being longer on the most 
prominent part; outer margin convex near the base where it is 
furnished with six to eight long finger-like processes which 
gradually decrease in size distally where the margin becomes 
concave; the surface of the appendage is studded with small 
blunt projections which occur also on the teeth. Claspers long; 
the first joint thick, incurved, with a broad basal process on the 
inner side which is distally truncated and bifid and meets its 
fellow in a broad flat surface in the middle line; distal end of 
joint concave; second joint long, slender, incurved, more or less 
abruptly narrowed near the middle where there is a moderate 
convexity, and ending in a single acute point; at the base of this 
joint is a small blunt spine which points backward and outward. 
Abdominal segments not narrowed in front or produced back¬ 
ward at their posterior angles, the last segment slightly wider 
distally than the preceding ones. Anal appendages narrowly 
lanceolate and setose on both sides from base to tip. 
In the female the much smaller second antennae end in a 
slender, attenuate incurved process. 
Length 12mm. General color bluish green; ventral side of 
abdomen, outer surface of male organ, stylets, and dorsal side 
