Sept., '03] ENTOMOLOGICAL NEWS. 225 



17. Enallagma geminatnm. 



Morrow Swamp, May 4,23; June 1,7. 



18. Enallagma exsnlans. 



Cedar Bluff, Va., August i, 1899; Sneedsville, August 16, 

 and Haynes' P. O., August 19, 1899, on Clinch River, Tenn. 

 (C.C.A.). Richland Creek, Morrow Farm, June 2 ; Sycamore 

 Creek, June 5. 



19. Enallagma signatnm. 



Centennial Grounds, September 25 ; Morrow Swamp, May 

 14, 30; June 7. 



20. Enallagma poUutnm. 

 Morrow Swamp, May 11. 



21. Ischnura vertical] s. 



Centennial Grounds and Morrow Farm, April 15, 29 ; May 

 4, 5, 23, 30; June i. 



22. Ischnnra prognata. 



Morrow Swamp, May 4, 5, 11, 22, 30. A description of the 

 female, hitherto unknown, follows. 



Ischnura prognata 9. — Length, 38, abdomen 32, hind wing, 21 mm. — 

 Recently emerged. Bright orange, marked with black and bronze ; lab- 

 rum narrowly black on either side, wider basally ; suture between clypeus 

 and labrum with a black median spot ; suture between frons and clypeus 

 black ; vertex bronze, first segment of antennae pale, ocelli ruby, A 

 straight mid-dorsal thoracic stripe about .5 mm, wide, a distinct spot on 

 the humeral and lateral sutures at base of each wing and an indistinct 

 short stripe on first laterals uture, bronze ; below paler orange, feet pale, 

 spines black, last tarsal segment and tarsal hooks black tipped. First 

 abdominal segment indistinctly darker apically ; 2 and 3 with dorsal apical 

 rings of bronze, and 3 with a subapical dorsal spot ; 4 with a dorsal 

 stripe occupying apical 6-7 of segment, apically abruptly dilated into an 

 urn-shaped spot, sometimes this spot and the dorsal stripe not continuous; 

 from segment 4 the bronze dorsal stripe is continuous, with narrow basal 

 interruptions at each segment, to J^ the length of segment 9 ; remainder of 

 abdomen yellow ; sterna narrowly black, reduced to a basal spot on 

 segment i. Nodal sector of front wing arising normally between the 

 fourth and fifth postcubitals, nearer the fifth ; in the hind wing arising 

 between the third and fourth postcubitals ; 3 antenodal cells. Spine not 

 present on the apex of the sternum of abdominal segment 8. 



Like other Ischnura females and those of Anomalagrion has- 

 tatiim, and of Nchalennia posita, that of prognata becomes 

 pruinose with age. 



