cg4 NEW YORK STATE MUSEUM 



FIG. 



6 Genital bamules of O. carol us Ndm. 



7 Inferior abdominal appendage of O. carolus Ndm., seen from below 



8 Head of nympb of Lantbus parvuUis Selys, seen from above and in 



front 



9 Mentum of labium of L. parvulus from above 



10 End of abdomen of L. parvulus 



11 End of abdomen of Gompbus fraternus Say, nympb 



12 Part of labium of G. fraternus Say, nympb 

 ISEndof abdomen of Gompbus pall idu8 Selys, nympb 



14 Part of labium of Gompbus pallidus Selys, nympb 



15 End of abdomen of Gompbus spiuiceps Walsb, nympb 



16 Part of labium of Gompbus spiniceps Walsb, nympb 



From the Canadian entomologist, 1897, v. 29, pi. 7, "Preliminary studies 

 of North American Gompbinae," by James G. Needbam. 



PLATE 21 



Cordulinae 



T S o m a t o c h 1 o r a e 1 o n g a t a Selys. Photo from life by J. G. Needbam 

 2 Cast nymph skin of Epicordulia princeps Hagen : drawn by Mrs 

 Needbam 



PLATE 22 



Cordulinae 



Fig 

 1 Epicordulia princeps Hagen, $: drawing by Mrs Needbam 



2Tetragoneuria spinosa Selys, $ showing peculiar wing markings. 



Photo by H. N. Howland. 



PLATE 23 



Libellulinae 



s c ia 

 2L. pulchella Dru. 



Fig. 

 1 Libellula semifasciata Burm. 



PLATE 24 



Libellulinae 



Fig. 



1 Platbemis lydia Dru^ 



2 Celitbemis eponina Dru. 



3 Peritbemis domitia Dru. 5 



4 P. domitia Dru. $ 



PLATE 25 



Nymphs of S y m p e t r u m 



Fig. 



1 Sympetrum iUotum Hagen 

 2Sympetrum semicinctum Say 



