326 ME. W. P. KIEBT— A EEVISION OE 



pterostigma, and there is a brown spot over the lower extremity of the nodal vein ; 

 the apical third of the wing is clear hyaline, and the tip of the hind wing is slightly 

 brownish. This is the only other specimen in the British Museum which agrees with 

 the supposed P. domitia, from St. Domingo, in neuration, but there are others, from 

 Jamaica, in the Dublin Museum. 



Perithemis intensa. (Plate LI. fig. 7.) 



Long. corp. 25 millim. ; exp. al. 40 millim. ; long. pter. 3 millitn. 



Male. — Brown (colours of body altered) ; pleura greenish, two black dots at the 

 extremity of most of the segments of the abdomen above ; anal appendages black, 

 moderately long, the upper appendages depressed, not much longer than the lower. 

 Wings deep brownish-yellow, the basal cells and several of the cells in the first 

 antenodal costal space of the fore wings clearer, nervures reddish ; pterostigma red, 

 rather long (slightly longer on the hind wings than on the fore wings) ; fore wings 

 with 8 antenodal and 6-7 postnodal nervures ; triangle very large for the size of the 

 insect, and very oblique, the upper and basal sides being of equal length, and the outer 

 side longer, divided by two transverse nervures, and the upper cell bisected ; triangle 

 followed by three and four or four and three rows of discoidal cells ; subtriangular 

 space consisting of three cells ; hind wings with the triangle traversed by one nervure ; 

 membranule small, white. 



Hab. Mexico. 



Celithemis fasciata. (Plate LIL fig. 2.) 



Long. corp. 34 millim. ; exp. al. 60 millim. ; long. pter. 31 millim. 



Male (mature). — Black, vertex violet, occipital triangle reddish, face reddish, sides 

 and rhinarium dull yellow, labium clear yellow, except the sutures ; pleura, base of 

 abdomen at sides, and legs dark reddish brown; pleural sutures indistinctly black. 

 Wings with 7-8 antenodal and 7-8 postnodal nervures; triangle rather broad, crossed 

 by one or two nervures, and followed first by four and then by three rows of cells ; 

 pterostigma reddish brown, enclosed by black nervures ; fore wings with the apex 

 brown from the middle of the pterostigma, and with a brown band extending on the 

 costa from the second or third postnodal nervure nearly to the pterostigma, and 

 transversely across the wing nearly to the hind margin, on the outer side it is 

 excavated between the subcostal nervure and nodal sector ; the first antenodal space 

 is yellowish, and the second is filled up by a brown basal streak, invading the first 

 space towards its extremity, this is connected with a transverse band running rather 

 irregularly towards the inner margin, extending from the vein of the nodus (between 

 which and the lower sector of the arculus it is excavated on the outside, on the disk it 

 is excavated on the inside) to the base of the nodal sector, and throwing off a branch 

 towards the base between the sectors of the arculus nearly to their origin, which is 



