HYnROCAMPIDJ-:—HYDKOCAI^TPA. 291 



trigonate, and rather pointed, the discal cell very narrow ; 

 hind wings elongated, ample, the cell narrow, and cross-bar 

 angulated ; legs long and thin. 



Larv^ and Vmvs. aquatic. 



We have two species, readily discriminated. 



A. Wings clear white with golden-brown stripes. 



H. stagncdis. 



A". Wings clouded with brown, with dai'ker stripes and 



white spots. H. in/inphcmlis. 



1. H. nymphaealis, I'^chiff. ; nymphaeata, L. — Ex- 

 panse 1 to Ij inch. Foi'e wings light bronzy brown with 

 numerous pearly white spots ; hind wings shining white, 

 with a large central crescent, and before the hind margin a 

 broad brown band. 



Antennae of the male simple, dark brown ; palpi minute, 

 brown tipped with white ; head white, with a brown line 

 down the face, and another across the back portion ; thorax 

 pale brown, or white barred with brown : abdomen slender, 

 gloss}', brown, each segment shaded and edged with white. 

 Fore wings elongate, rather refuse ; costa very flatl}^ arched ; 

 apex angulated ; hind margin curved and a little oblique ; 

 pale golden brown ; base irregularly clouded with white and 

 showing no definite first line; in the middle area are three 

 large white spots edged by slender double brown strigse ; just 

 beyond them is the second line, undulating and indented, 

 white ; along the hind margin is a row of small white spots 

 sometimes joined into a slender stripe, edged outside by a 

 yellow line ; cilia shining pale brown. Hind wings pearly 

 white ; crossed near the base by a double golden-brown line; 

 central spot lunate, golden brown, followed by a broad, 

 irregular double stripe of the same colour, dusted with darker, 

 its outer section by far the broader and throwing out several 

 projections, of which one near the middle touches the hind 

 marginal stripe ; this last is yellow, edged on either side by a 



