NO. 1389. DRAGON FLIES OF BURMA AND SIAM— WILLIAMSON. 173 



4. LIBELLAGO VITTATA De Selys. 



"Bhamo en juiu et juillet (Fea)/' No specimens of this species are 

 represented in collections before me. 



RHINOCYPHA Rambur. 



Dorsal mesothoracic trianoujar area long-, reach ino- the antealar 

 sinus. Male: wings expanded, anal area beyond the level of the medio- 

 anal link at its widest part at least 3 times as wide as at its narrowest 

 part; Cu., not zigzagged before half its length; hind wings with 3 rows 

 of vitreous spots. Fenestrella group. 



Male. Middle series of vitreous spots on hind wing consisting of 2 spots, the posterior 



one 7-9 cells wide; apical sjwt aV)out 10 cells wide cuneata, adaniavt'ma 



Male. Middle series (consisting of J^ spots (often a fourth between the middle and pos- 

 terior one), the 2 posterior ones homologous with the posterior spot of cuneata; 

 apical spot 8 cells or less wide. 



Apical spot 4-6 cells wide, entirely under stigma; stigma red, surrounded with 



black, darker in old individuals .fenestrella 



Apical spots 8 cells wide, basally not under the stigma; stigma black, obscure 

 yellowish in the middle fjnadrimaculata and spuria 



Dorsal mesothoracic triangular area short. Male : wings less expanded, 

 anal area less widened; C^i.^ zigzagged for more than half its length. 



Male. Apical third of the hind wings dark colored hiforatu 



]\Iale. Apical dark color on hind wings beginning at the nodus iginpennh 



Male. Apical dark color on hind wings beginning at the level of the medio-anal 

 link iridea 



Since the publication of Kirby's catalogue the following species have 

 been described: 



R. turcon'd De Selys," "Patrie: Panay pay (lie de Zebu).'' Described 

 as related to Jieterostigina and anit^optcra. 



R. h'idea De Selys. ^ Burma: " Leito en mai; puepoli cii juin (Fea)." 

 Described as related to fe)iestrat((. 



R. sUjgia Forster,'" ''Patrie: Le mont Kina, Balu, au nord de File de 

 Borneo." In wing coloration this species is described as related to 

 hnmaculata. 



R. page7istecher! Forster/' " Heiraat: die Insel Lombok.'' Related to 

 ter)iunata. 



R. pageristecherl subrasse Kniiihana Forster,- "Ileimat: Patadalu, 

 Sumba-(Sandelholz-)lnsel.''' 



R. apicalis Kriiger.'" Descrilied as ^^ Rhinocyplia hisigndta Hagen^ 

 ajncalisn. sp." "Heimath: Sumatra, Sinabong (Dohrn)." 



«Anales de la Soe. Esp. de Nat. Hist, XX, 1891, p. 21o. 



'>Ann. del Museo Civico di Storia Nat. di Geneva, Serie 2", X (XXX), 1S91, p. 492. 

 ''Ann. Soc. Ent. Belg., XLI, 1897, p. 210. 

 ^/Ent. Nachr., XXIII, 1897, p. :«3. 

 ^Idem, p. .335. 

 /Stett. Ent. Zeit., 1898, p. 79. 



Proc. N. M. vol. xxviii— 04 12 



