MORE NEUROPTERA FROM JUAN FERNANDEZ AND EASTER ISLAND 



313 



Veins with short hairs; the margins strongly ciHated. 5 crossveins in inner 

 gradate series; 7 or 8 in outher series. 3 in inner series of hindwing, 5 in 

 outer series. 



Length of forewing 6,5 mm; that of hindwing 5,5 mm. 



One female specimen from Masatierra, Juan Fernandez (BackstrOm leg.). 



This species is easily recognized by its strongly tinged forewings. The 

 body of the specimen is somewhat discoloured. 



Hemerobius nigrinus n. sp. 



Palpi and face pale testaceous. Below each eye a dark spot; below the 

 antennae a large rhomboidal blackish spot, enclosing two small triangular pale 

 spots. Posterior part of vertex blackish. Antennae yellowish; at tip of first 

 and second antennal joint a dark spot be- 

 low. Thorax jet black above. Lateral mar- 

 gins of prothorax and a spot above the base 

 of each wing yellowish. Venter of thorax 

 and of abdomen pale yellow. Dorsum of 

 abdomen brown, with paler joinings and 

 pleurae. Legs pale yellowish. Membrane of 

 wings quite hyaline. Venation of forewing 

 pale yellowish and with dark streaks. In 

 the pterostigmatical area three small dark 

 spots; at the posterior angle and at the tip 

 of Cu2 a dark streak along the margin. 

 First and second radial sector brownish 

 shaded at the spot where they are touched 

 by the crossveins in the inner gradate series. 

 5 crossveins in inner gradate series, 7 in outer series. Between Cu-^^ and Cu2 

 only one crossvein. Three radial sectors. Venation of hindwing pale yellowish; 

 some parts darker. 



Length of forewing 6 mm; that of hindwing 5 mm. 



One female specimen from Masatierra, Juan Fernandez (Backstom leg.). 



The species may easily be separated from South American species by 

 its shining black dorsum of thorax. 



Fig. 6. Hemerobius nigrinus $. 



