160 NEUROPTER A OF NORTH AMERICA. 



dorsal stripe, and the sides obsoletely yellow ; wings hyaline, nar- 

 row ; pterostigma long, black ; membranule blackish-gray. (Male.) 



Fifteen antecubitals ; ten postcubitals ; two discoidal areolets. 



Length 40 millim. Alar expanse 69 millim. Pterostigma 4 

 millim. 



Hob. Cordova (Saussure). 



It is most like Libellula angustipennis, but the posterior lobe of 

 the prothorax is shorter, not rounded, and the external hamule is 

 narrower, divided. 



Subgenus Orthemis HAGEN. 



The first sector of the triangle straight; the abdomen broad, 

 depressed; female having the sides of the eighth segment dilated; 



pterostigma large. 



22. O. discolor! 



Libellula discolor Burm. ! Handb. II, 856, 51. Libellula macrostigma 

 Rambur ! Neuropt. 57, 54. Selys ! Poey, Ins. Cuba, 447. Libellula 

 ferruginea Fab. Syst. Entom. 423, 19. Sp. Ins. I, 523, 25. (Not of 

 Entom. Systemat.) 



Rufous or blue, pruinose (adult male), labium yellowish, fuscous 

 in the middle ; thorax with the dorsal sulcus yellow, each side with 

 four yellow lines ; feet rufous, the femora in part paler ; abdomen 

 rufous, a dorsal stripe, and each side at base yellowish ; wings hya- 

 line, the apex sometimes infuscated ; pterostigma large, fuscous ; 

 membranule black. 



Var. Thorax and abdomen with no yellow stripes. 



16 19 antecubitals ; 13 15 postcubitals ; three discoidal are- 

 olets. 



Length 48 55 millim. Alar expanse 70 95 millim. Ptero- 

 stigma 7 millim. 



Hob. Western Texas ; Matamoras, Tampico, Mexico ; Cuba ; 

 Martinique; San Domingo; Guadaloupe; St. Thomas; Porto 

 Rico; St. Croix; Jamaica; Porto Cabello, Venezuela ; Surinam, 

 Guiana; Chili; Equador; Guayaquil; Rio, Minas Geraes, Bahia, 

 Pernambuco, Brazil. A most common species. 



LEPTHEMIS HAGEN. 



Eyes very slightly connected ; posterior lobe of the prothorax 

 large, bilobed; abdomen long, almost longer than the wings, nar- 



