82 DRAGONFL1ES OF OHIO. 



Male; colors brown and green. Front green darker 

 approaching brown above, margin of mouth brown. 

 Thorax brown, an antehumeral band and two lateral 

 bands with a spot between their superior ends, green. 

 Wings yellowish, veins and pterostigma brown; legs; 

 femora brown at base, black at apex, tibiae and tarsi 

 black. Abdomen brown marked with bright green 

 which becomes obscure in dry specimens ; 10 with a 

 mid-dorsal tooth. 



Superior appendages, basal third narrow, remain- 

 der widened, median longitudinal carina present, in- 

 ferior edge hairy. Inferior appendage one half as long 

 as superiors, oblong, notched at apex. 



The female lacks the spine on the dorsum of 10, but 

 has a spined projection ventrally on that segment. She 

 also has the rear of the eyes elevated so that a promi- 

 nent projection is formed each side of the occiput. 



The species flies during early summer. When on the 

 wing it is continually catching insects, great number, of 

 which are required to satisfy its voracious appetite. It 

 is one of the few dragonflies that often enter buildings. 



^JSCHNA, Fabricius. 



The species of this genus fly very commonly from 

 August until the end of warm weather in the fall. In 

 protected places along the edge of woods, one may find 

 all of our Ohio forms flying together most any time in 

 September. The different species are so much alike that 

 one can not with certainty recognize them on the wing. 

 Like the other members of this sub-family they take 

 long excursions over sunny fields in search of flies and 

 other insects for food. The three species of the genus 

 taken in Ohio ma}' be separated as follows: 



1. Male, anal triangle of hind wing with three cells; a prominent 

 spine at inferior distal angle of superior appendages. Female, 

 genital valve strongly elevated at apex, vulvular process long, 2 

 millim constricta. 



