166 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviii. 



other than occasional references in this matter unnecessar3\ Second, 

 to incorporate in the papers keys and, if necessary, other descriptive 

 matter snfiicient to enabk' anyone interested to determine for himself 

 the si)ecies known to occur in the regions under consideration. How- 

 ever, but comparatively few localities have been visited hy collectors; 

 cons(»quently in thesis papers g-reat incompleteness, when compared 

 with the list of species eventually to be found, must be expected. 

 "May its incom|)leteness be soon shoAvn by a multitude of new 

 discoveries.'' 



De Selys in 18<.»1" recorded 88 odonates from Burma, based on col- 

 lections made by Leonardo Fea, and numbering- more than 750 speci- 

 mens. The localities visited by Fea are as follows: Teinzo, a village 

 al)Out -1^ ;>()' north latitude, northeast of Bhamo, on the Moolay 

 River, a tril)utary of the Irawadi; Bhamo and Shwegoo on the Irawadi; 

 ]\Iandalay on the Irawadi, 22 north latitude; Rangoon and Palon, 

 between K! and IN- north latitude, on the Irawadi; Toungu, W north 

 latitude, on the Sittang River; Leito, Cobapo, Puepoli, Meteleo, lado, 

 Tao, and Chiala, villages in the mountainous regions between the 

 Sittang and Salwin valleys; Moulmein, Kokarit, Meetan, Thagata, and 

 Malewoon, towns between 10 ' and IT"" north latitude. As mentioned 

 elsewhere, the material studied by myself from Burma comes onl}' 

 from the neighborhood of Toungu. Doctor Abbott's collecting in 

 Siam was all done in the province of Trong, Lower Siam. 



This paper deals with the subfamily Calopterygina\ De Selvw in 

 18i»l listed 11 species from Burma. Twenty-one species are now 

 known from Burma and Siam. The collections before me include 17 

 of these. This su))family includes manv of the most beautiful dragon- 

 flies of the world, iridescent and metallic effects glowing on wings and 

 bodies with the brilliancy of gems. In size they vary from pigmies 

 to giants, but all are dedicate insects and often the body is extremely 

 slender. Undovibtedly the study of their habits should attract those 

 to whom the beauties of nature are a continual delight, revealing 

 much of interest and value. In collections of dragonfiies from Burma 

 and Siam, as in all collections almost without exception regardless of 

 localit}", males are nuich more numerous than females. In the genera 

 Eiq>li-cV(i and Dijxj>ltxn^ for example, De Selys has connnented on the 

 great rarity of females, attributing this to the fact that they have not 

 attracted collectors as have the brighter males. ^Nlr. Laidlaw * thinks 

 "that this scarcity in collections is not due to their being overlooked 

 by collectors. I can safely say that I never saw a female of this spe- 

 cies {Dy-sphmi JimJxita) or of F.nphivd !iHpat\ while the males were at 

 times abundant." But Mr. Laidlaw's argument in no wise invalidates 



« Odonates de Birmanie, Ann. del Museo Civico di Storia Natnrale di Genova. 

 Serie2«X (XXX), 1891, pp. 433-518. 



&Proc. Zool. Soc. Lond., Feb. 4, 1902, p. 88. 



