1956] 
Carpenter — Baltic Amber Snake-flies 
79 
Family Inocelliidae 
Genus Fibla Navas 
Existing species of Fibla are known to occur only in parts 
of the Old World, although one extinct species has been 
found in the Miocene of Colorado. 
Fibla erigena (Hagen) 
Figure 2 
Raphidia ( Inocellia ) erigena Hagen, 1854, Ver. Zool. Bot. 
Ges., 4:228; Hagen, 1856, in Berendt, Org. Reste, 2(2) :83, 
plate 8, fig. 14. 
Hagen’s type of erigena is presumably lost, but two speci- 
mens in the Harvard collection undoubtedly belong here. 
They are the basis of the following account: Fore wing: 
length, 10-13 mm. ; width 3.5 mm. ; costal margin broad. 
Hind wing: length, 4.5 mm.; width 3 mm. Venational de- 
tails are shown in the figures. Prothorax 1.8 mm. long, 
1 mm. wide. 
Figure 2. Fibla erigena (Hagen). A. Fere wing drawn from specimen 
No. 5120, MCZ. B. Hind wing drawn from specimen No. 5121, MCZ. For 
explanation of be and MP2, see text. 
The original Hagen specimen was apparently splendidly 
preserved; allowing for slight inaccuracies in Hagen’s fig- 
ure, I can recognize no significant differences between his 
insect and the ones now at hand, which are as follows: No. 
5120, with the right wings, head and thorax very well pre- 
served ; the other wings and the abdomen have been broken 
