20 DRAGONFLIES OF OHIO. 



Lestes rectangularis, Say. 



Length: Abdomen of S" 40 mm., of the 9 33 mm. ; 

 hind wing J' 22 mm, ? 23 mm. 



Head, thorax, and abdomen of the female above 

 'and the last four abdominal segments of the male 

 blackish brown : the abdomen of the female is some- 

 times greenish bronze with a mid-dorsal light line on 1- 

 2 or 3. The anteclypeus, lips, genae, tinder parts of the 

 head and thorax, the thoracic carina, humerals, and 

 sides of the thorax are yellowish or greenish white. 

 The legs are pale with black as follows: a narro\v 

 stripe ( may be wanting ) on the exterior of the second 

 and third femora; two on the first pair; also on the 

 inner side of first tibiee, the ends of the tarsal joints 

 and the claws are brownish. In the female the stripes 

 on the legs are wider and the tarsi blacker than in the 

 male. In the male the top of 1 and 2 are brown; 3-6 

 testaceous with basal lighter rings and apical darker 

 ones. In the female 1-10 are yellowish on the sides, the 

 same extending over the dorsum as narrow basal rings 

 on 1-6. The superior appendages of the male are 

 testaceous, blackish on apical third, forcipate, no 

 denticles out side; the lamina on the inside is short 

 with long and slender, terminal and minute marginal 

 teeth. The inferior appendages are black, exceeding 

 the lamina of the superiors and bent downward at the 

 end. The appendages of the female are slender, con- 

 ical, testaceous, tips black. The valves are narrow and 

 black below. 



Rectangularis occurs abundantly in all parts and 

 may be recognized by the very long male abdomen and 

 pale color of body and legs. 



Lestes vigilax, Hagen. 



Length : of abdomen d' 40 mm., ? 37 mm.; of hind 

 wing d 26 mm., ? 27 mm. 



