DYTHEMIS. 165 



6. D. frontalis! 



Libellula frontalis Burm.! Handb. II, 857, 56 ; Selys ! Poey, Ins. Cuba, 453. 



Black, pruinose ; front white, above greenish-chalybeous ; thorax 

 pruinose, the dorsum with a yellowish spot each side, which is not 

 very clear ; feet black, anterior femora pale inside ; abdomen slen- 

 der, a little shorter than the wings, black, segments 7 to 9 dilatedly 

 ovate; appendages black; wings hyaline; pterostigma black; 

 membranule black; fifteen antecubitals ; postcubitals — ? three 

 discoidal areolets. 



Length 44 millim. Alar expanse 13 millim, Pterostigma 2£ 

 millim. 



Hab. St. Domingo; Cuba (Collection of De Selys Longchamps). 



7. D. pleurosticta ! 



Libellula pleurosti eta Burm.! Handb. II, 849, 3. — Libellula celaeno Selys! 

 Poey, Ins. Cuba, 454. 



Brownish-black; front whitish, chalybeous above; thorax nigro- 

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

 wings, angulose, and an intermediate line, greenish-white; sides 

 black, each with three larger spots and two smaller ones, greenish- 

 white ; feet blackish-brown ; abdomen of the length of the wings, 

 slender, almost equal, black, segments 1 — 8 (or 9 9) marked upon 

 the dorsum with a double, linear, greenish-white spot ; appendages 

 black ; wings hyaline, a basal small streak, almost absent in the 

 males, fuscous; base of the posterior wings a little fulvous ; ptero- 

 stigma black; membranule cinereous ; fourteen antecubitals ; 8 — 10 

 postcubitals ; two discoidal areolets. 



Length 43 millim. Alar expanse 59 — 64 millim. Pterostigma 

 2 millim. 



Bob. Cuba ; St. Domingo ; St. Thomas ; Brazil. 



8. D. didyma ! 



Libellula didyma Selys. Poey, Ins. Cuba, 453. — Libellula phryne Ranib. 

 Neuropt. 121, 27. 



Brownish-black; mouth and front yellowish, front chalybeous 

 above ; thorax nigro-fuscous, dorsum each side, with an oblique 

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

 greenish-yellow; sides greenish-yellow, with three brassy-brown 

 stripes ; feet black, the anterior femora interiorly partly pale ; the 

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



