NO. 1571. DRA GON FLIES OF B URMA AND SI AM— WILLI A MSON. 



299 



the position of these cross veins definite and .subject to but .slight 

 varinfion, the hrst near tlie distal end of the sup('rtrian<j;!e; .'] rows 



Fig. 20. -Wings or m.vle ANouMoGtjMPnus hetf.ropterus. De Selys' collection. 



of postanal cells, the first 2 umhvided, siiuilar in size and .sliape, the 

 third wider and once divided; \., in liind wing; arisinij:; near the middle 

 of the lower side of the trian<rle; area included between Cu., and A, 



Fig. 27.— Wings of male Burmagomphus vermiculatus from Burma. 



in hind wing of moderate length, at the margin not twice as long as 

 wide. At first glance the venation of the hind wing suggests Gomphus 

 with the anal area reduced. Li Lanthus, an American genus very 



