20 



NEUROPTERA. 



on sandy places are their favourite resort. The two following 

 species occur in Belgium and France : — 



Myrmeleon formicarius, L., Burm. ii. 996, 15. 



Exp. 26 lin. 



Brown ; thorax spotted with yellow ; tarsi with pale 

 annulations ; fore wings with a white stigma and 

 black spots ; hind wings with two black spots on the 

 costa. 



31 '. formicalynx, Burm. ii. 994, 4. 

 Exp. 26 lin. 



Brown ; thorax with pale border ; w r ings unspotted, 

 with a white stigma. 



2. Antennae long, the tip not thickened. Sub-family 

 Hemerobid^:. 



A. The veins in the marginal area of the fore wings which 

 are nearest to the thorax are straight, and do not 

 ramify. 



a. Ocelli visible. 



Genus Osmylus, Latreille. 

 The larva lives partly in water ; cocoon of irregular 

 form, of spun silk. (See Linnaea Entomologica, vii.) 



1. Osmylus chrysops, L. ; 0. maculatus, St. ; C. 

 Exp. 19 lin. 

 Brown ; head reddish ; tarsi yellowish ; wings spotted 



with black ; the fore wings most so on the hinder 



margin, the hind wings most near the costa. 

 Habitat England, local, in June. This pretty insect 



appears to prefer stony, rapid streams which are 



fringed with alders. 



