416 Records of the Indian Museum. [Voi<. XXIV > 



Heliogomphus nietneri Selys. 

 icJ Kalar, iooo ft., March 1916, coll. F. C. Fraser. 

 This specimen differs form the Ceylon form described by 

 Hagen in the same particulars as the Assam species described by 

 I^aidlaw except that there are lateral markings as far as abdom- 

 inal segment 6. The wings are saffronated at the base as far 

 outwards as the node, this colour gradually diffusing outwardly. 

 Stigma pale brown. 



Caught in dry jungle a mile or so away from the nearest water. 



Heliogomphus pruinans, sp. nov. 

 A single pair taken together, Burliyar, Nilgiris, 1500 ft., 20/vir2i. 



Male. Hindwing 32 mm. Abdomen 42 mm. 



Head black, the labrum with two basal greenish spots whose 

 opposing borders are deeply concave ; bases of mandibles greenish 

 white ; a greenish white band across the frons which is rounded 

 and flattened ; occiput depressed, black ; eyes bottle green. 



Prothorax black, the posterior lobe and an anterior band 

 yellowish green, beneath pruinosed white. 



Thorax black on the dorsum marked by a complete, meso- 

 thoracic collar and narrow dorsal bands lying close to and parallel 

 to the dorsal crest, both greenish yellow ; laterally greenish yellow 

 marked by two narrow black lines on the sutures, confluent above 

 and below. Beneath and on lower part of sides pruinosed white. 



Legs black, the hind femora with a row of very closely set 

 and very small spines. 



Wings enfumed ; stigma blackish brown, braced only in one 

 wing ; no basal antenodal 'of second series ; only one cubital 



nervure to all wings ; nodal index 



15-12 . , , . , 



; trigones of hmd- 



12-11 12-12 



wing very elongate, the costal side twice as long as the basal ; 3 

 rows of discoidal cells at level of node ; all triangles entire ; base 

 of wings very oblique and closely resembling that of A nisogomphus ; 

 other points as for genus. 



Abdomen black marked with pale greenish yellow as follows : 

 a fine, middorsal line extending from segments 1 to 5, thickest at 

 2 ; a complete basal annule almost encompassing segment 7 and 

 occupying about the basal third ; a minute triangular basal point 

 on the dorsum of 8, the remainder black. Laterally a spot on 1, 

 the oreillet and an apical spot on 2, and small basal spots on 3 to 6. 



Anal appendages as for genotype, the superior black at base, 

 pale green to yellow at the apices, which are turned at first in, then 

 up and finally out. 



Female very similar to the male but much larger. The 

 occiput simple, depressed, exactly similar to that of the male. 

 Sides of thorax vivid greenish yellow, the pruinescence on the 

 lower part of sides and beneath more marked than in the male. 



Wings saffronated at the extreme base. The lateral spots on 

 segments 1 to 3 forming a continuous unbroken line ; on segments 

 4 and 5 the line is interrupted to form two elongate spots, whilst 



