400 Records of the Indian Museum. [Vol. XXIV, 



Burmagomphus pyramidalis, sp. nov. 



8 & S, 10 9 ?. Poona, Aug., Sept., 1919. F. C. Fraser. 



I S . Nilgiri Hills, June, 1917. F. C. Fraser. 



1 9. Gopaldhara, Darjiling district, 1913. H.Stevens. 



Male. Head. Lower lip yellow, black at its margins with 

 lateral lobes greenish-yellow. Upper lip greenish-yellow, with 

 narrow, black, anterior margin, and transverse black basal line pro- 

 longed forward in the middle line, but not meeting the black of 

 the margin. Bases of mandibles yellow, genae black. Ante-clypeus 

 black, post-clypeus black, with a median spot of greenish- 

 yellow, and a pair of lateral spots of the same colour. Frons yellow , 

 margined with black. Occiput and vertex black. The posterior 

 margin of the occiput is slightly concave. 



Prothorax black, with a greenish-yellow spot on either side. 



Synthorax. There is a broad, complete mesothoracic collar 

 of yellow. Above this is a pyramid of black, at the apex of which 

 lies a small median yellow spot against the ante-alar sinuses. 

 The pyramid is outlined on either side by an oblique yellow band 

 which runs from just below the median yellow spot, without ac- 

 tually touching it, to the base of the second pair of legs. This 



FiG. 17. — Colour pattern of Burmagomphus pyramidalis, sp. nov., <$ , 

 semi-diagrammatic. 



band is abruptly narrowed above from without inward, and ends 

 dorsally in a fine point. To the outer side of its upper end and 

 close below the lateral part of the ante-alar sinus is a small yellow 

 triangle. The black colouring extends from the outer margin of 

 the yellow band to just beyond the humeral suture. Laterally 

 the synthorax is yellow, with a complete narrow band of black 

 along the second lateral suture, and with a black mark along 

 the lower part of the first lateral suture, extending upwards a very 

 little beyond the level of the spiracle. A short black line descends 

 vertically from the base of the first wing towards the black 

 band of the second lateral suture, but does not meet it. Legs 

 black, coxae of first and third pairs, and ventral surface of first 

 pairs of femurs marked with yellowish- white. 



Abdomen black. First segment with a basal dorsal mark of 

 yellow, and a lateral mark of the same colour. Second segment 

 with a basal ring of yellow, a mid-dorsal triangle of the same 

 colour, and the sides of the segment, including the oreillet, like- 

 wise yellow: an apical ring of black. Segments 3-8 with a basal 

 ring of yellow, extending for about one-sixth of the length of the 

 segment on 3, about one-fifth on segment 7, very narrow on 8, 



