296 



UNIVERSITY OF COLORADO STUDIES 



134 



133 (127) Antenna of 12 segments. Fifth foot of one segment armed with a 

 spine-like seta and two long ones. Outer mar- 

 gins of furca serrated and the stout outer termi- 

 nal seta stands out at an angle. Length of 

 female, i . 25 mm. . Cyclops serrulatus Fischer 



All parts of state; 4,100-11,150 ft. [World-wide.] 



(loi) Abdomen not sharply separated from 

 cephalothorax. Antennae never of more than 

 8 segments. . Family Harpactidae 135 



(136) Antenna of 6 segments. 



Genus Marshia 



We have one species. Furca of female 



about two and a half times as long as broad; 



the two median furcal setae are fused at the 



Marshia albuquerquensis Herrick 



[General distribution (?).] 



Fig. iq,— Cyclops serrulatus 



base. 



Length, 0.8 mm. 



1 alkaline marsh at La Junta. 



Fig. 80. — Marshia 

 albuquerquensis. 



Fig. 81. — Canthocamp- 

 tus minutis. 



Fig. 82. — Canlhocamp- 

 tus staphylinoides. 



136 (13 s) Antenna of 8 segments. . . . Genus Canthocamptus 137 



Representatives of this genus are evidently widespread in Colorado but infrequently found and then 

 in small numbers. Two species are listed here, but in my collections are a few specimens which cannot be 

 placed in either of these. 



137 (138) Furca short — very little longer than wide. Spines of anal plate 

 double pointed. Length: male, o.s; female, 0.6 mm. 



Canthocamptus minutis Claus 



Greeley, Silver Lake; 4,600-10,200 ft. ["Found everywhere in the northern contments": Marsh.] 



138 (137) Furca about twice as long as broad. Spines of anal plate single 

 pointed; 4-12 in number. Length of my specimens about 0.7 mm., but 

 Pearse's measurements are: male, 0.9; female, i . i mm. 



Canthocamptus staphylinoides Pearse 



Specimens from 6 localities in the Tolland region are doubtfully referred to this species rather than to 

 staphylinus Jurine. My specunens have fewer anal spines, the second segment of the 5th foot is shorter and 



