46 NEUROPTERA. 



thick, spotted above as far as the seventh segment ; 

 wings hyaline, the base a little yellowish, the posterior 

 with a triangular black spot; pterostigma black; 

 vulvar scale prolonged into two long triangular ligulce, 

 which are contiguous except at the end. 

 In Belgium. 



t f. Upper anal appendages whitish. 



Z. albifrons, Burm. ; Revue, p. 59. 



Length 16 lin. ; exp. 26 lin. 



Black, spotted with orange, villous ; abdomen slender, 

 cylindrical, spotted above as far as the sixth segment ; 

 powdery blue in the adult male ; wings hyaline, pos- 

 terior with a triangular black spot; pterostigma 

 black ; vulvar scale with two broad, contiguous la- 

 mellce, very short. 



In Sweden, Prussia and Austria. 



L. caudalis, Charp. pi. 44 ; Revue, p. 62. 



Length 16 lin. ; exp. 28 lin. 



Black, spotted with orange, villous ; abdomen much 

 dilated at the tip, depressed, spotted above as far 

 as the sixth segment ; wings hyaline, the base tinged 

 with saffron, the posterior with a triangular black 

 spot ; 'pterostigma black; white above in the male, of 

 which the abdomen is powdery blue ; vulvar scale 

 prolonged into two long ligulce, contiguous except 

 at the end. 



In Belgium ; and in France, near Paris. 



