HEMEROBIDES. 231 



dorsal spots, one towards the fore border, the other towards the hind 

 border, its length full twice its breadth : mesothorax with a black 

 spot in front of the scutum : abdomen towards the base and meta- 

 thorax brownish: legs yellow: wings limpid; veins pale green, 

 much like those of N. extraneus in structure, but less numerous ; 

 transverse veinlets more or less black towards the base and along 

 parts of the hind border; stigma slightly testaceous, very faint: 

 fore-wings deeply emarginate on the hind border at the base. 

 Length of the body 6 lines ; of the wings 20 lines. 



a. West Australia. From Mr. Clifton's collection. 



Genus 4. POLYSTQECHOTES. 



Ocelli nulli. Tarsi antici tibiae aequales, ungues elongati, gra- 

 ciles, plantula vix conspicua. 



Polystoechotes, Burm. Handb. Ent. ii. 982. 

 Hemerobius, p.? Fabr. 



1. POLYSTCECHOTES STICTICUS. 



Fuscus, subtus pallidior ; alarum anticarum venee albo variegate 

 vittisque transversis irregularibus fuscis. 



Polystoechotes sticticus, Burm. Handb. Ent. ii, 982. 

 Hemerobius nebulosus ? Fabr. Ent. Syst. Suppl. 202, 1, 2. 



North America. 



Genus 5. OSMYLUS. 



Caput transversum. Frons tumidus. Labrum rotundum. La- 

 bium apice rectum, transversum, margine lineari subfisso. Oculi 

 mediocres. Antennae breves, moniliformes. Prothorax elongato- 

 cylindricus, valde distinctus, antice rotundatus, mesothorace multo 

 angustior. Metathorax tuberculatus. Alae longae, pilosa?, sublan- 

 ceolatae, margine postico subacutae ; areolae discales rhomboidales 

 aut polygonae ; venae marginales bifidae ; costa alarum anticarum 

 subdilatatae sub rotund ata?. 



Osmylus, Latr. ; Leach ; Sam.; Steph. ; Burm.; Ahrens; Wesm. ; 



Ramb. 

 Hemerobius, p., Linn.; Vill. ; Oliv. ; Sulz.; Schr.; Fabr.; Rcem.; 



Berk. ; Turt. ; Don. ; Shaw. 

 Osmylina, Schneider, Monogr. Chrysop. 35. 



x 2 



