422 
MEXICAN DERMAPTERA 
Measurements {in millimeters) 
eP 
Length of 
body 
Length of 
pronotum 
Length of 
tegmen 
Length of 
forceps 
Length of 
pygidium 
Orizaba. 
8 
1.2 
1.6 
3.1 
1.1 
Orizaba. 
6.4 
1.1 
1.4 
2.8 
.9 
Motzorongo. (5) 
4. 5-5. 2 
.8-. 9 
1.2-1. 2 
1. 6-2.1 
.35-. 5 
Motzorongo'® 
o 
4 
.7 
1.2 
1.3 
.35 
V 
Orizaba, Type. 
7 
1.2 
1.7 
2.5 
Orizaba. 
5.3 
.8 
1.2 
1.7 
Motzorongo. (4) 
5-6.2 
.8-. 9 
1. 1-1.2 
1.8-1. 9 
It is to be noted that, with the reduction in size, the reduction in 
the male pygidium is greater proportionately to that in the for- 
ceps. In the largest male the pygidium is over one-third the 
length of the forceps, in the next largest male one-third, while in 
the series of small males the pygidium averages about one-ciuarter 
the length of the forceps. 
Specimens Examined: 16;i® 10 males and 6 females. 
Orizaba, Vera Cruz, Mexico, I and II, 20, 1892, (L. Bruner), 2 cf , 1 9 ; VI, 
6, 1899, (O. W. Barrett), 1 9 , type, [A. N. S. P.]. 
Motzorongo, Vera Cruz, Mexico, II, 1892, (L. Bruner), 8 cf , 4 9 . 
Forficulidae 
ANECHURINAE 
Anechura vara (Scudder) (Plate XXVIII, figures 12, 13 and 14.) 
1876. Forficula vara Scudder, Proc. Bost. Soc. Nat. Hist., xviii, p. 260. 
[Puebla (terra frigida), Mexico.] 
Chalchicomula, Puebla, Mexico, II, 1892, (L. Bruner), 26 cf, 
33 9. 
When compared with Burr’s diagnosis of the genus and material 
of the genotype, A. hipunctata (Fabricius), the present insect is 
found to differ in having the fifth antennal joint longer than the 
third; the male having the ultimate dorsal abdominal segment 
smooth and without projections above, but with a bluntly conical 
projection on each side ventrad, at the juncture with the sub- 
chitinous, bilobate subgenital plate.®® These features may 
require the separation of vara from the genus Anechura, but we 
Forceps not fully developed, smallest and least brilliantly colored specimen. 
We have also examined the type of Caudell’s synonymous S. minuta, from 
Guatemala. 
®® These projections are homologous to the spiniform tubercles found in 
Praos perditus (Borelli), which author described them as being on the subgen- 
ital plate. 
