THE SUBFAMILY LIBELLULIN^. 313 



simple, triangle converted into a trapezium, open, followed bv one row of cells, then 

 two, subtriangular space consisting of one cell, sectors of the arculus with a long stalk, 

 gradually curved, lower basal cell with one cross nervure, nodal sector curved at base, 

 the subnodal slightly irregular, intermediate cells only divided on the hind margin, 

 sectors of the triangle rising together at its apex ; hind wings slightly broader than the 

 fore wings, with 5 antenodal and postnodal nervures, the first postnodal not continuous, 

 triangle regular, its base corresponding with the continuation of the arculus, open, 

 followed by two rows of cells, the upper sector rising above the middle of its outer side. 



Type Nannophya bella, Uhl. 



The description of the genus is partly compiled from those of Hagen and Brauer, and 

 partly from N. sylvia, sp. n. Hagen's N. maculosa, which is described as having 8 ante- 

 nodals, and first two cells, and then one beyond the triangle, may not be congeneric ; the 

 species which seems to represent Hagen's Nannophya semiaurea (MS.) certainly is not. 



Genus 87. Nannophya. 



(Neuration, Plate LVI. fig. 7.) 



Rambur, Ins. N^vr. p. 27 (1842); Brauer, Verb, zool.-bot. Ges. Wien, xviii. pp. 369, 726 (1868). 



Frontal tubercle rounded ; eyes contiguous in front ; abdomen moderately slender, 

 hardly thickened at the base, shorter than the hind wings, segments 2 and 3 carinated : 

 pterostigma moderate, about two and a half times as long as broad ; fore wings with 

 6-7 antenodal nervures, the last rarely continuous, and 4-5 postnodals, the first, and 

 sometimes the second also, not continuous, cells of the postcostal area simple, triangle 

 converted into a trapezium, free, followed by one or tvv^o rows of cells, no supra- 

 triangular nervures, subtriangular space consisting of one cell, sectors of the arculus 

 stalked, the upper sector angulated before the middle, lower basal cell with one cross 

 nervure, nodal and subnodal sectors and lower sector of the arculus regulai-ly curved, 

 cells between the nodal and subnodal sectors simple ; hind wings broader than the 

 fore wings, with 4-5 antenodal and 4-6 postnodal nervures, the first postnodal not 

 continuous, triangle large, free, followed by one row of cells (the first cell sometimes 

 divided), and then more, no supratriangular nervure, one cross nervure in the lower 

 basal cell, sectors of the triangle united at their origin : appendages of the second 

 abdominal segment in the male prominent. 



Type Nannophya pygmcea, Eamb. 



Genus 88. Fylla, g. n. 



(Plate LII. fig. 6.) 



Frontal tubercle rounded; eyes contiguous in front; abdomen moderately slender, 



cylindrical, hardly thickened at the base in the male, and not at all in the female, in 



which the abdomen is rather stouter, not thickened before the extremity in either sex, 



and distinctly shorter than the hind wings, segments 2 and 3 carinated, also 4 in 



VOL. XII. PART IX. No. 9. ^M^MS*, 1889. 2z 



