184 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvm. 



from their orig-in, followed by one row, this single row breaking up 

 near the wing luarg-in us in anin'tiu. De Sel3\s records tlie species for 

 Palon (August and September') and Leito (May). He states that the 

 species occurs also in Tndia. Tiiihet, and Cochin China. 



MNAIS De Selys. 



The Pahearctic and Oriental species of this genus may be separated 

 as follows: -'-- 



Abdomen slender; stigma small, squarish, less brilliant, simil^in 

 adults of both sexes; wings more expanded, Cuj ending aboia%?'or 

 before the level of tlie nodus; stigma followed normally by one row 

 of cells. Oriental. 



Abdomen more robust; stigma twice as long as wide, red in the 

 male, white in the female; wings less expanded, Cuj ending beyond 

 the level of the nodus; stigma followed by 2 rows of cells. Palajarctic. 



17. MNAIS ANDERSONI McLachlan. 



Material studied: Burma, collection P. A. N. S., 2 males, 2 fe;iiales. 



This species was original!}' described from Yunan from 2 males, 

 one of which, the tirst described, had the venation l)lack and the 

 wings slightly tinged with olivaceous, the other having the wings yel- 

 lowish red. 



De Selys" writes that conditions exist intermediate between the 

 olivaceous and yellow forms. I have before me 28 specimens of 

 Mnais from Burma, and there are no intermediate forms. I there- 

 fore retain the name ander><())ii for the black- veined species, which 

 may be described as follows: Abdomen, male 4:2 nun., female 3T; 

 hind wing, male 33 nmi., female 32. Venation black, wing membrane 

 -very slightly tinged with olivaceous. The 2 males l)efore me have 

 the last 3 segments of the abdomen pruinose, the dorsum of the 

 thorax not pruinose; the second segment of the antenna^ is less than 

 half yellow, and the stigma is smaller than in the yellow-winged 

 species. The 2 females listed under "material studied"' are referred 

 to this species solely l^ecause thev were associated with the males. 

 They are green, ])ronzy, especially on the thorax and last abdominal 

 segments; the second segment of the antenna? is largely yellow and 

 the stigma is dull red. 



« Odonates de Birmanie, p. 485. 



