166 NEUROPTERA OP NORTH AMERICA. 



the apex, black, segments 1 6 with a linear, yellowish spot each 

 side, the base of the seventh with a larger, twin-spot, greenish- 

 yellow ; appendages black; hamules not prominent ; wings hya- 

 line, the extreme base fulvous ; pterostigma oblong, blackish- 

 brown ; membranule black. 



The female varies by having the abdominal spots larger. 



9 11 antecubitals; seven postcubitals ; two discoidal areolets. 



Length 33 35 millim. Alar expanse 57 milliin. Pterostigma 

 2J millim. 



Hal. Cuba (Poey) ; Matamoras, Mexico ; Tampico (Saussure). 



The Mexican specimens are larger, and the stripes and spots 

 are larger ; perhaps they constitute a distinct species. 



9. D. dicrota ! 



Dythemis dicrota Hagen ! 



Brownish-black; mouth and front yellowish, front chalybeous 

 above ; thorax black, dorsum each side with an oblique line, the 

 intermediate sulcus and a transverse line at the wings, yellowish- 

 green ; sides greenish-yellow with two brassy-fuscous stripes ; 

 feet black, the anterior femora beneath partly yellowish ; abdomen 

 a little shorter than the wings, slender, broader before the apex, 

 black, segments 1 6 with a linear spot each side, the seventh 

 segment with a larger, basal yellowish twin-spot ; appendages 

 black ; hamules prominent, large, recurved ; wings hyaline, the 

 extreme base fulvous ; pterostigma oblong, fuscous, membranule 

 black ; ten antecubitals ; seven postcubitals ; two discoidal areo- 

 lets. 



Length 33 36 millim. Alar expanse 53 57 millim. Ptero- 

 stigma 3 millim. 



Hal. Cuba (Poey). 



10. D. pertinax! 



Dythemis pertinax Hagen ! 



Nigro-fuscous ; mouth and front pale yellow ; middle of the 

 labium black ; front above and vertex chalybeous ; thorax blackish- 

 fuscous, the dorsum each side with a stripe, which is broader at 

 the wings, angulose, green ; the sides nigro-fuscous, with two 

 oblique, green stripes ; feet black, anterior femora at the base 

 beneath rufous ; abdomen slender, a little longer than the wings, 

 the base compressed, more inflated, the apex a little stouter; 



