312 P. ESBEN-PETERSEN 
whitish; crossveins in the gradate series and part of the adjoining longitudinal 
veins blackish; fork of Cz, also somewhat blackish shaded. 
Length of forewing II mm; that of hindwing 9 mm. 
In »Notes from Leyden Museum», XXXVI, 267, fig. 3, 1914, I have 
mentioned a specimen (deposited in Leyden Museum) from Agualani, Casa- 
baya, S. E. Peru, as belonging to Gayomyza falcata. At that time I did not 
possess the work of BLANCHARD, and I had only at hand a copy of the de- 
scription. I am now convinced in regarding that specimen as belonging to a 
new and undescribed species, closely allied to BLANCHARD’s species. 
Hemerobius Skottsbergi Navas, The Natural History of Juan Fernandez 
and Easter Island, Vol. III, 125. 
One male and one female were present from Masafuera, and one male 
from Masatierra, Juan Fernandez 
(BACKSTROM leg.). 
I think the species is the same 
as Hemerobius Bolivari Banks (Proc. 
Ent. Soc. Wash., vol. XII, 159, 1910) 
from Columbia and Peru. I possess 
two female specimens of the last 
named species from Peru, determined 
by BANKS himself, and they agree 
exactly with those from Juan Fer- 
Fig. 4. Anal appendages of Hemerobius Skotts- . wes: 
berg 3. nandez. I give here a drawing of 
a abdomen seen from tip; 4 seen from side. the anal appendages of the male 
of Skottsberg?, and when a male 
of Bolivarz comes at hand, the question as to the synonymy can then be 
settled. 

Hemerobius fumosus pn. sp. 
Head, palpi and antennae pale yellowish; vertex with some brown irre- 
gular spots; a brown spot on each gena. Prothorax much broader than long, 
brown, with a narrow longitudinal pale me- 
dian streak and with pale lateral margins. Meso- 
and metathorax testaceous with ill-defined dark 
streaks. Abdomen dark; joinings and pleure 
paler. Legs whitish. Thorax and abdomen with 
rather long pilosity. Membrane of wings hyaline, 
with a dark smoky grey tinge in the two apical 
third part of forewing. Along the apical border 
of forewing a row of white spaces. Three radial 
sectors. One crossvein between Cu, and C7. 
Venation brown; in the basal part and in the 
costal area pale streaks. Crossveins dark brown; 
those in the inner gradate series of the forewing 
brownish shaded; also the inner crossvein be- 
tween JZ, and Cw, strongly brownish shaded. Fig. 5. Hemerobius fumosus &. 

