1954j 
Carpenter — Amber Mecoptera 
39 
Bittacus minimus, n. sp. 
(Figure 4D) 
Fore wing: length, 11.5-13 mm.; width, 3 mm.; body 
light brown; wings uniformly light brown, much as in 
antiquus; no wing-markings ; venation as in fossilis, with 
a single pterostigmal cross-vein ; cubital cross-vein below 
first fork of M; no anal cross-vein. Male genitalia as in 
figure 4D; copulobi short, without a dorsal incision, broad 
basally; paraprocts apparently small (not clearly pre- 
served) ; spiral filament small, forming only part of a 
single loop. 
Holotype: No. 5113, M.C.Z., Baltic amber collection; a 
nearly complete male, clear dorsally but cloudy ventrally; 
length of fore wing, 13 mm. 
In addition to the type, there are three females in the 
Harvard collection which I believe belong here: No. 5114, 
a complete and well preserved female, with a wing length 
of 13.5 mm.; No. 5116, another complete female, with a 
wing length of 11.5 mm.; and No. 5115, an exceptionally 
well preserved female, with a wing length of 11.5 mm. 
There is also a nearly complete female, apparently this 
species, in the amber collection of the British Museum 
(No. IN 18855) ; it has a wing length of 13 mm.'^ 
The male on which this species is based is readily dis- 
tinguished from that of fossilis by the different form of 
the copulobi; but the wings of the two species show no 
differences, in either venation or form. On the basis of 
the material at hand, however, I consider minimus to be 
the smaller of the two and I have placed the above-men- 
tioned females here on that basis. 
Bittacus succinus, n. sp. 
(Figures 3B and 4C) 
Fore wing: length, 17 mm.; width, 5 mm.; body and 
wings light brown; distal part of wings with nebulous 
dark areas ; venation as in figure 3B ; two pterostigmal 
cross-veins; cubital cross-vein below fork of M; no anal 
"*1 am indebted to the authorities of the British Museum for the loan 
of this specimen. 
