424 
MEXICAN DERMAPTERA 
Length of body, cf , 7.5 to 9.8; 9 , 8.7 to 9.5: of forceps, cf , 3.8 to 
8.7; 9 , 3.3 to 4.1 mm. 
Doru lineare (Eschscholtz) 
1822. Forficula linearis Eschscholtz, Entomogr., p. 81. [Santa Catharina, 
Brazil.] 
The synonymy of the present species and the Mexican material 
represented in the present collections has been fully studied 
NEOLOBOPHORINAE 
Neolobophora ruficeps (Burmeister) 
1838. F[orficula] ruficeps Burmeister, Handb. Ent., ii, ii abth., pt. i, p. 755. 
[Mexico.] 
Atoyac, Vera Cruz, Mexico, XI, 1887, (L. Bruner), 1 cf. 
Fortin, Vera Cruz, Mex., XI, 1887, (L. Bruner), 4 cf, 1 9, 
1 juv. 
Orizaba, Vera Cruz, Mex., I, 13, 1892, (L. Bruner), 5 cf , 7 9 . 
Motzorongo, Vera Cruz, Mex., II, 1892, (L. Bruner), 2 cf , 1 juv. 
Chalchicomula, Puebla, Mex., II, 1892, (L. Bruner), 1 9 . 
Burmeister’s description, though very incomplete, is sufficient 
to determine the species without question; Scudder’s more fully 
described volsella, has been shown to be an absolute synonym. 
It is of interest to note that the Mexican series before us differs 
in the following respects from the features considered diagnostic 
for ruficeps by Burr.^^ The tegmina and caudal portions of the 
pronotum are smooth in these specimens, the male pygidium 
with the form of its two apical projections varying from elongate 
trigonal (as found in the majority of the present series and in all 
the Costa Rican and Panamanian specimens before us), to minute, 
and sharply conical, these disto-lateral in position. The smooth- 
ness or roughness of the tegmina and caudal portions of the pro- 
notum is evidently of no specific value in ruficeps, though it 
apparently has some geographic significance. In a species as 
variable as the present, we would strongly oppose the separation 
of the more southern series as a distinct geographic race. At 
any rate, the species was described from Mexico and, from the 
material at hand, we believe the typical condition to be that 
with smooth pronotum and tegmina. 
” Rehn and Hebard, Jour. N. Y. Ent. Soc., xxii, p. 90, figs. 1 to 4, (1914). 
Ent. Monthly Mag., Ser. 2, xvii, p. 112, (1906). 
