318 
PANAMA DERMAPTERA 
pear probaV)lc that other species, referalhe to this group, have 
l)een (lescril)e(l. Burr has placed under annidata all of the mate- 
rial which he had of both the Annulata and Dorsalis Groups,^^ 
not only locating dorsalis, chahjhea, arcuata and rotundata in the 
synonymy under that name, but also jlaviscuta. Such action 
can only be attributed to jumping at conclusions in a difficult 
group, with insufficient material at hand. 
The weakly produced lateral angles of the male dorsal abdom- 
inal segments and simple, slender, well separated female forceps, 
readily separate individuals of the present group from those of the 
Dorsalis Group. 
Labia annulata (Fabricius) 
1793. [Forficula] annidata Fabricius, Ent. Syst., ii, p. 4. [Islands of merid- 
ional America.] 
1838. F[orficida] dorsalis Burmeister, Handb. Ent., ii, abth. ii, pt. i, p. 754. 
[Colombia.] 
Porto Bello, Panama, II, 25, to III, 6, 1911, (Busck; Schwarz), 
1 2 9. 
Bohio, Canal Zone, Pan., II, 7, 1911, (Schwarz), 1 9 • 
Paraiso, C. Z., Pan., I, 14 to 25, 1911, (Schwarz), 1 d',2 9 . 
The present insect agrees with the brief Fabrician description, 
from which Burmeister’s description of dorsalis shows no diag- 
nostic differences. 
To the present minute species, nearest relationship is shown by 
L. arcuata, small and brilliantly colored examples of the latter 
species bearing to material of annulata a close superficial resem- 
blance. 
The following features of importance are noted in the series 
before us. Antennae with first segment equal to combined 
length of second, third and fourth; second quadrate; third only 
slightly longer than wide; fourth quadrate but larger than second; 
longest joint about three times as long as wide; joints dark to 
eleventh or twelfth, remaining joints pale. Pronotum, tegmina 
and wings shining black, metallic, showing a weakly bluish 
luster in some lights; pronotum sometimes paler, brownish, 
particularly laterad. Limbs with suffused annuli. Caudal 
metatarsus distinctly longer than combined length of second and 
23 Proc. U. S. Nat. Mus., xxxviii, p. 453, (1910). 
