485 



Abdomen similar in general color to that of the male ; anal appen- 

 dages largely black or dark brown, the process immediately above and 

 between the superiors projecting as in disjunctus; ovipositor with 

 broad lateral valves, the ventral margins coarsely toothed, the distal 

 portion separated from the tenth segment by a considerable interval; 

 more than the ventral half of the lateral valves black; eighth sternites 

 large, conspicuous, nearly black, and contiguous on the meson. 



Measurements 



Length, $ 48-49 mm. 



Length, 9 47 mm. 



Length of abdomen, $ 39 mm. 



Length of abdomen, 9 36 mm. 



Length of hind wings, S 29 mm. 



Length of hind wings, 9 28 mm. 



"Width of hind wings, 2 6.5 mm. 



Width of hind wings, 9 5.5 mm. 



Described from two males in the Bolter collection of the Uni- 

 versity of Illinois and a number of females in the collection of E. B. 

 Williamson. 



The species is closely related to vigilax and inacqualis, but both 

 sexes may be distinguished by the flavescent wings ; the males, by the 

 short inferior anal appendages. 



Probably occurs in Illinois. 



Lestes forcipatus Rambur 



Nymph. — Color, buff or green. 



Head brown and buff; labium, when folded, extending just caudad 

 of the mesocoxae; mental setae six, the lateral setae three, two of 

 which are located on the distal segment of the palpus ; antennae of the 

 usual Lestes type. 



Thorax about as long as broad, brown ; legs slender, the femora 

 all with faint subapical rings and several rows of small setae; tibiae 

 with dark brown apices and with a few three-pointed subapical scales ; 

 tarsi with the apical half of the last segment and the tarsal claws dark 

 brown; metathoracic wing-cases extending to the middle of the third 

 abdominal segment. 



Abdomen long and slender ; lateral keels with heavy setae at the 

 apices on segments five to nine, and a single row of smaller ones from 

 the bases to the apices of the keels of the same segments; terga all with 



