KELLICOTT. 13 



may capture scores of them. A slender, drooping 

 twig of the willow, loaded with these beautiful insects 

 looks like a string of rubies and presents a beautiful 

 picture. 



The species occurs throughout Ohio, and it may be 

 found from mid-summer until late in October by run- 

 ning waters, especially where the flow is rapid over 

 rocks and pebbles and the borders are overhung by the 

 spray of willows or coarse aquatic plants. 



Hetaerina tricolor, Burmeister. 



Length of abdomen cT 41, 9 35, of hind wing cT 30, 

 9 30. 



Male deep blackish brown, thorax reddish brown, 

 mid-dorsal thoracic carina black, humerals narrow, 

 pale, yellowish apical rings on 1-4; legs black; wings 

 hyaline, tips of all brown, more on hind wings ; basal 

 fourth of fore wing crimson, except between the first 

 and second antecubitals, hind wings brown at base 

 except hind margin ; pterostigma nearly black, small. 



Abdominal appendages black, less forcipate than in 

 americana, as long as 10, exteriorly toward the 

 apex there are coarse teeth, within at base a blunt 

 hairy tubercle followed by a blade whose margin is first 

 excavated, then convex and truncated distally; the 

 inferiors are half as long, upturned apically with two 

 terminal sharp tubercles. 



The female is bronze green ornamented with pale 

 buff. The face, antennae, except terminal half which is 

 black, and occiput buff; prothorax has the posterior 

 lobe elevated and rounded in the middle, bordered with 

 buff and with a geminate, orange spot in the 

 middle and with a wash of the same at the sides ; 

 thorax green, mid-dorsal black stripe, buff either side 

 uniting] with humeral of the same color; sides buff 

 with green spot on each ring; legs green and pale, 

 tarsi black ; wings flavescent throughout ; ptero- 



