1922.] F. C. Fraser : Indian Dragonflies. 421 



Abdomen tumid at base, 3 to 7 very narrow and cylindrical, 

 the latter broadening at apex, 8 and 9 very broad, especially the 

 former (but not winged), 10 rather small, segments progressively 

 smaller from 7 to 10. 



Abdomen black, marked with yellow as follows : a triangular 

 dorsal spot and a large lateral spot on segment 1 ; a trilobed dorsal 

 spot, the oreillet and a large apical lateral spot on 2; 3 with the 

 dorsum narrowly at the base and a large lateral basal spot ; 4 to 



6 with dorsal basal spots meeting rather broadly over the carina ; 



7 with a broad basal annule prolonged apicalward along the 

 dorsal carina ; 8 with a small round spot on the dorsum at the 

 base, the basal part narrowly expanded, also an L-shaped mark 

 on the middle of the side, the " |_ " lying on its back ; 9 with the 

 whole of the lateral border yellow ; 10 unmarked. 



Anal appendages black, much the same as in the genotype, 

 the superior, however, very broad, hollowed out below and corre- 

 spondingly domed above. 



Hamuli projecting as two long foliate structures directed 

 forwards ; lobe of penis of enormous size. 



The robust short stature and the general facies of this 

 species are quite unlike any other Gomphus I know of from India 

 and recall the size and shape of Ictinus. 



Burmagomphus pyramidalis, race. 

 1 <? Hasimara Tea Estate, Duars, Bengal, coll. H. V. O'Donel. 



Differs from type by the occiput being all black, by the yellow 

 on the labrum being cut up into two spots by the median prolonga- 

 tion of the basal black meeting the bordering black, and lastly by 

 the inferior anal appendages being strongly recurved upwards at 

 their apices almost like a fish-hook. 



The size is also much larger : abdomen 36 mm., hindwing 

 26*5 mm. Wings rather deeply enfumed. 



Burmagomphus duarensis, sp. nov. 

 A single male from Hasimara Tea Estate, coll. H. V. O'Donel, Sept. 21. 



Male. Abdomen 34 mm. Hindwing 26 mm. 



Head entirely black save for bases of mandibles and a broad, 

 bright yellow line on the upper surface of frons ; occiput straight, 

 simple, fringed with a few black hairs. 



Prothorax black with a large citron yellow spot on either side. 



Thorax black on dorsum with dorsal oblique stripe united to 

 a narrowly interrupted mesothoracic collar ; humeral stripe repre- 

 sented only by a small upper spot. Sides citron yellow, the 

 sutures finely outlined in black. 



Wings hyaline, saffronated at extreme base ; stigma light 

 brown, braced, one or two rows of cells between M{ and M{ a ; a 

 basal antenodal nervure of 2nd series in both the forewings ; nodal 



index : 



II-IO 



16-11 



IO-IT 



