DIPLAX. 183 



anterior one narrow, bipartite ; the female sometimes has the base 

 of the anterior wings flavesceut, and some of the antecubital ner- 

 vules marked with fuscous. I have also seen females with the 

 fulvous spot and the fuscous stripes on the posterior wings very 

 small ; pterostigma oblong, yellow ; membranule white, cinereous 

 inwardly. 



Adult Male. Almost entirely black, subpruinose. 



6 9 antecubitals ; 5 7 postcubitals ; three discoidal areolets, 

 then two. 



Length 30 32 millim. Alar expanse 55 millim. Pterostigma 

 2^ millim. 



Hob. Philadelphia; Florida (Norton). 



17. D. amanda ! 



Libellula pulchella Burm.! Handb. II, 849, 2. 



Bright yellow ; mouth and front yellow, before the eyes a nar- 

 row fuscous band ; thorax yellow, dorsurn with a broad black stripe ; 

 sides yellow, sutures fuscous at the wings ; abdomen triquetral, 

 yellow, the segments black posteriorly, the three last black ; ap- 

 pendages yellow ; feet black ; femora partly yellow ; genital lobe 

 narrow linear; vulvar lamina rounded, excised in the middle; base 

 of the wings broadly flavescent, the posterior ones with a double 

 stripe, veined with yellow, the anterior one narrower, bipartite, 

 fuscous; pterostigma short, yellow; membranule white; eight an- 

 tecubitals; five postcubitals; two discoidal areolets. 



Length 25 27 millim. Alar expanse 44 47 millim. Ptero- 

 stigma If millim. 



Hob. Savannah, Georgia. 



18. D. minuscula ! 



Libellula minuscula Ramb.! Neiiropt. 115, 118. 



Yellow, varied with black; front yellow, above chalybeous; tho- 

 rax black, pruinose (adult male), or yellow, dorsurn each side, with 

 a fuscous stripe ; the sides yellow, the sutures narrowly fuscous ; 

 feet black, anterior femora yellowish at base ; abdomen short, tri- 

 quetral, yellow, the dorsum with three maculose, black stripes, and 

 the apex black; appendages pale yellow; vulvar lamina triangular, 

 erect, excavated; wings hyaline, the extreme base of the posterior 

 ones fulvous ; pterostigma oblong, yellow; membranule cinereous ; 

 eight antecubitals; five postcubitals; two discoidal areolets. 



