298 ME. W. F. KIEBY — A EEVISION OF 



pointed ; appendages of the second segment small, but the hamulus distinct, rising 

 straight, and the apex recurved ; legs long, clothed with numerous long and slender 

 spines or bristles; claws of the tarsi bifid. 



Type Libellula celceno, Selys. 



Our figures represent M. hemichlora, Burm. 



Genus 58. Dtthemis. 



Hagen, Neur. N. Amer. p. 162 (1861); Brauer, Verb, zool.-bot. Ges. Wieu, xviii. pp. 368, 733 



(1868). 



Frontal tubercle convex ; eyes contiguous in front ; abdomen slender, as long as the 

 hind wings, the base gradually thicker, segments 2 and 3 carinated, segment 8 not 

 perfoliate in female: wings rather long and narrow, pterostigma long; fore wings with 

 15-16 antenodal and 9-10 postnodal nervures, the last antenodal and the first two or 

 three postnodals not continuous, cells of the postnodal area simple, triangle long, rather 

 narrow, nearly straight, a little beyond that of the hind wings, traversed, followed by 

 three rows of cells, increasing, no supratriangular nervures, one cross nervure in the 

 lower basal cell, subtriangular space consisting of three or four cells, sectors of the 

 arculus stalked, gradually curved at the extremities, nodal sector distinctly waved in the 

 middle, subnodal nearly continuous, the intermediate cells bisected towards the hind 

 margin ; hind wings broader than the fore wings, with 10-12 antenodal and postnodal 

 nervures, the first three postnodals not continuous, triangle free, its base on a level 

 with the arculus, followed by two rows of cells increasing, no supratriangular nervures, 

 one cross nervure in the lower basal cell, sectors of the triangle generally rising from a 

 point, but sometimes showing a tendency to separation ; spines of the legs rather short 

 and slender : anal appendages of the male as long as the eighth segment, the lower 

 appendage only slightly shorter than the others ; appendages of the second segment 

 not conspicuous. 



Type Libellula rufinervis, Burm. 



Genus 59. Scapakea, g. n. 

 Frontal tubercle concave; eyes contiguous in front; abdomen moderately stout, 

 shorter than the hind wings, a little compressed, the base somewhat gibbous and 

 gradually thickened, greatly thickened at the extremity beyond segment 6, especially 

 in the male, where the expanded apex is broadly spatulate and depressed, segments 2 

 and 3 carinated, segment 8 not perfoliate in female : wings rather long ; fore wings 

 with 14-16 antenodal and 9-10 postnodal nervures, the last antenodal and the first 

 three postnodals not continuous, cells of the postnodal area simple, triangle long, rather 

 narrow, oblique, a little beyond that of the hind wings, traversed, followed by three 

 rows of cells, increasing, no supratriangular nervures, one cross nervure in the lower 

 basal cell, subtriangular space consisting of three cells, sectors of the arculus stalked, 



