110 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. 
tip of the antenna, and that upon the fourteenth far beyond it. The 
first segment is as long as the two following, and very nearly twice as 
long as wide. The second is very short, its length one-fourth its 
width, and the length and width of the third are equal. Of the three 
terminal segments the penultimate is longest, being twice as long as 
broad; the antepenult two thirds the length of the following; the last 
is about as wide as long. The armature of the legs is as follows: 
FIRST FEET. 
ex. 2 spines. ex. 2 sete. 
Outer ramus + ap. 1 spine, 2 sete. Inner ramus 4 ap. 2 sete. 
in. 3 sete. in. 1 seta. 
SECOND FEET. 
ex. 2 spines. ex. 3 sete. 
Outer ramus jap. 1 spine, 2 sete. Inner ramus jap. 2 sete. 
in, 4 sete. in. 1 seta. 
THIRD FEET. 
ex. 2 spines. ex. 1 seta. 
Outer ramus jap. 2 sete. Inner ramus ; ap. 2 sete. 
in. 4 sete. in. 3 sete. 
FouRTH FEET. 
( ex. 2 spines. ex. 1 seta. 
Outer ramus 4 ap. 2 sete. Inner ramus jap. 2 sete. 
lin. 4 sete. in. 2 sete: 
The fifth feet are two-jointed, the terminal joint with one long and 
one short seta at tip; the basal joint with one long seta without. 
Length without set 1.2mm. Grebe lake, Yellowstone Park. 
*Cyclops insignis Claus. 
PLATES XXII, Fies. 11-14; XXIII, Fies. 6, 7. 
Claus ’57 and ’63; Sars ’63; Fric ’72; Brady ’68 (lubbockii) and ’78 and ’91; Rehberg 
: 780; Herrick ’84; Richard ’91; Schmeil ’91 and ’92. 
Schmeil has doubtfully identified C. lubbockii Brady with the brack- 
ish varieties of C. bicuspidatus = C. helgolandicus Rehberg. Though 
the names are given in the synonomy above, it is with the under- 
Standing that they at least constitute a distinct variety. 
The typical form has an elliptical cephalothorax, the first segment 
being more than half as long as the remainder. The abdomen is rela- 
tively short and its first segment greatly expanded, ‘The stylets are 
very long, fully half as long as the rest of the abdomen, and are longi- 
tudinally ridged as in CO. strenuus. The lateral apical set are short, 
while the median ones are long and more nearly equal than usual. 
Antenne 14-jointed, not much longer than the first segment of thorax, 
similar to C. strenuus. Fifth foot exactly as in C. strenuus. Length 
2.5 to 5.0 mm, 
