487 



brown longitudinal bands which are considerably narrowed basally on 

 segments three to seven and conspicuously widened subapically on seg- 

 ments 2-6, the apically widened portion enclosing a lateral yellow spot 

 en segments 3—6; segment nine completely black except a small lateral 

 yellow spot; lateral surfaces of terga 1-8 and ten, yellow; anal appen- 

 dages (Fig. 137) consisting of broad superiors which are coarsely 

 tuberculate on the lateral surfaces and have two strong, mesal teeth ; 

 inferiors nearly as long as the superiors, not laterally compressed, but 

 flattened and placed horizontally. 



Female. — Color similar to that of the male. 



Head and thorax not appreciably different from those of the male. 



Abdomen without the yellow lateral spots of the male ; ovipositor 

 extending caudad of the tenth segment, the lateral valves serrate on 

 the apical two-thirds of the ventral margins (Fig. 114). 



Measurements 



Length, S 44 mm. 



Length, $ 41 mm. 



Length of abdomen, S 30 mm. 



Length of abdomen, 9 32 mm. 



Length of hind wings, S 23-24 mm. 



Length of hind wings, 9 24 mm. 



Width of hind wings, S 5 mm. 



Width of hind wings, 9 5 mm. 



One of the commonest of the Lestinae in Illinois. The nymphs 

 usually occur along with rectangularis in shady stagnant pools. The 

 species is on the wing from early June well into September, and nymphs 

 have been taken at Urbana late in July and at Lexington, Ky., late in 

 August. It seems probable that there is more than one brood of the 

 species per year. 



The nymph is inseparable from rectangularis and there seems to 

 be no noticeable difference in the length of the developing ovipositor 

 of the female as Walker inferred there might be ('14: 197)- 



The adult females are also inseparable from rectangularis except 

 by the (!omparatively shorter length and the black tarsal segments. As 

 already mentioned, the females have no important characters which 

 differentiate them from the species disjuncttis. 



Lestes inaequaIvIS Walsh 



Nymph. — Unknown. 



Adult; Male. — Color, metallic gi;een and black; or bronze and 

 black above, yellow or bufif below. 



