yEscJuia. 207 



I /mm., hind- 21mm.; femora obscurely ringed; tarsi 

 much darker than the rest of the leg. Wuig-axses 

 broad, about 9mm. long. Abdomoi enlarged gradually 

 to sixth .segment, then contracting rather rapidh' to the 

 end ; a few dots, lines, and smooth depressions, cor- 

 responding very much with those on ^. cyanca, but 

 much less marked ; no dorsal spines ; lateral spines on 

 segments 6 to 9, indicated on 5. Upper anal appendage 

 about I mm. shorter than lower ones, notched with a 

 square-cut notch ; laterals cylindrical, pointed, barely half 

 length of inferiors ; inferiors triangular, angular, longer 

 than last two segments, sharp-pointed. Male projeetion, 

 triangular, blunt, nearly as long as lateral appendages. 

 [From a male specimen taken from the canal near 

 B\'fleet, which died before disclosing an imago, but with 

 little doubt to be referred to this species. It agrees 

 with Cabot's description, in this case a short one.] 



Date. 



Once seen on June 23 ; but the beginning of Juh' is 

 the usual time for the insect to appear. Thence it 

 continues on the wing till about the middle of 

 September. 



Habits. 



Though perhaps even more powerful on the wing than 

 u'E. cj'aiiea, and oftener seen near water, its habits are 

 very similar to those of that species. When encountered 

 hawking along a hedgerow or a lane, with care a capture 

 is usually not difficult to effect ; but if once disturbed and 

 frightened, the insect will probabl}^ soar straight away 

 and be seen again no more. It is not an uncommon 



