ALscJdux. 205 



segments (second with auricles), contracted at third, 

 then fairly uniform to end ; brown ; two posterior dorsal 

 spots on second segment, and basal ones on third ; a 

 lateral blue or bluish-yellow spot on the anterior part 

 of each segment as far as the eighth ; a transverse yellow 

 streak on each of segments 2 to 8 interrupted by the 

 median carina. Aiuxl appendages brown ; upper of 

 moderate length, with a raised median carina, blunt at 

 tip ; lower triangular, about half length of upper ones, 

 tip rounded. 



Female Imago. 



Eyes yellowish-brown, with a bluish glance. Anal angle 

 of hind- wings rounded. Pterostiguia 4mm. long. Abdomen 

 stout at second segment, not contracted at third, but 

 graduall}' tapering to the end vA the se\enth ; eighth and 

 ninth expanding, tenth contracting to tip ; lateral spots 

 yellowish ; blue dorsal spots absent from segment 3. 

 Anal appendages small, leaf-like, rounded at tip. Ovi- 

 positor almost crimson, pointed, much curved, as long 

 as ninth segment. 



Oviposition. 



One or more females of this species were watched one 

 fine morning in September, as they were ovipositing in 

 the very shallow water close to the margin of the large 

 pond in Richmond Park. This the\' accomplished by 

 settling either on a floating weed, or on one that was 

 but little out of the water, and then bending the tip of 

 the abdomen so as to dip its extremit}' below the 

 surface. It appeared to be done deliberate!}-, as if the 

 eggs were being carefully deposited, as no doubt was 

 the case (Fig. 3, p. 14). 



