146 



Records of the Indian Museum. 



[Vol. XIX, 



paedisca Bversm.) Ac lies about half-way between level of Ax^ 

 and Ax.^. 



But the position of /4 c is variable in the first section of the 

 genus, though not so far as I know in Indian species. Thus in 

 L. ungutculata, H^gen from N. America it occupies precisely the 

 same level as in L. cingulata, Selys. And therefore I am in some 

 doubt as to the advisabiUty of using this character in defining 

 a genus, and as a matter of fact Tillyard does not so employ 

 it. 



As to the termination of the specific names. The generic 

 name Lestes is a term not necessarily I think of the masculine 

 gender. The specific name of the type-species L. s*^onsa Hansem, 

 is definitely feminine ; therefore I believe it correct to follow de 

 Selys in employing for the specific names the feminine termi- 

 nation. 



For venation I employ Tillyard's modification of the Comstock- 

 Needham nomenclature; Ax^ and Ax.^^ for antenodal nerves, Ms. 

 for the sector usuallv denoted by Rs. 



I. Petiolation of wing ceasing before the level of Ac. No 



supplementary sectors between Ms and Ms . Ac dis- 

 tinctly nearer the level of Axi than of Ax.2. 



II. Petiolation of wing commences at level of Ac. 



Supplementary sectors developed between Ms and 



(a) M-i rises 8-8^ cells distal to nodus on forewing. 

 Ac lies nearer level of Ax] than of Ax^,. Wings 

 coloured (in nnles of Indian species). 

 (|3) M-2 rises not more than 6 cells distal to nodus 

 in forewing. 

 A. Quadrangle of fore and hinder wings equal. 

 Inner side of quadrangle of hinder wing at least 

 two thirds length of upper side. 

 * Ms only slightly angled, in its disial half. 

 Pterostigma at least twice a^ long as broad. 

 i. Synthorax without metallic markings. 



Colour russel-brown, pterostigma unicoloured, 

 yellow or brown 



Thorax green, pterostigma dark, gray brown, 

 its outer quarter paler 



Thorax brown, pterostigma longitudinally 

 bicoloured (yellow and black), margin of wing 

 sharply decurved beyond the pterostigma ... 



ii. Synthorax with metallic green bands. 



Bands very narrow ; no black on head, 

 pterostigma brown, three times as long as 

 broad 



Bands broader, about one-third width of 

 mesepisternite, or more ; securiform above. 

 Head with black markings. Pterostigma 

 about two and a half times as long as broad, 

 black in adult. 



MEGALESTES. 



QROLESTES. 



Lestes jimbrina, 

 Selys. 



Lestes thoracica, 

 sp. n. 



Lestes nodalis, 

 Selys. 



Lestes viridiila, 

 Ramb. 



Lestes elata, 

 Selys. 



