414 
MEXICAN DERMAPTERA 
*basalis (Burr) 
recurrens (Burr) 
vicinus (Burr) 
confusus (Borelli) 
*alter (Burr) p;enotype 
*hilineatus 
parvus (Burr) 
ghilianii (Dohrn) 
*pygmaeus (Dohrn) 
*septentrionalis new species 
*schwarzi (Caudell) 
It would appear probable that Labia mexicana Bormans is a 
species related to Labia barberi Hebard; these species and those 
of the Championi Group of the genus Labia show close similarity 
in size and color pattern to many of the species of Microvostox. 
We feel unable to assign Labia tricolor Kirby, 
Microvostox basalis (Burr) 
1912. Spongovostox basalis Burr. Ann. k.-k. Nathist. Hofmus. Wien, xxvi, 
p. 337, fig. 16. [“El Zumbador” = El Tumbador, San Marcos, Guatemala.] 
Orizaba, Vera Cruz, Mexico, I, 1892, (L. Bruner), 1 9 ; III, 
13, 1908, (F. Knab), 1 9 , [U. S. N. M.j. 
Cordoba, Vera Cruz, Mex., Ill, 24, 1908, (F. Knab), 1 9 . 
Females of this species and of M. bilineatus are very similar; 
a comparison has been made recently.* 
Microvostox septentrionalis new species (Text fig. 1.) 
1914. Spongovostox ghilianii ? Burr (not Labia ghilianii Dohrn, 1864), Can. 
Ent. xlvi, p. 275. (In part.) [Material here considered.] 
Closely related to M. schwarzi (Caudell), differing in the larger 
size and more elongate form. In the male the pygidium is of the 
same general type but is more elongate, with apex minutely bilo- 
bate, and forceps, which are much longer, with a small but distinct 
and broad tooth on the ventro-internal margin, just beyond the 
mesal portion of the pygidium and a smaller tooth on the same 
margin one-third the distance from base to apex of the shaft. In 
females the forceps are proportionately slightly more slender and 
elongate and differ in showing a moderate, irregularly toothed 
dorso-internal projection. Both of these species are strikingly 
less robust than M. basalis (Burr) or ilf. bilineatus (Scudder), 
Tijpe. — cf ; Tampico, Tamaulipas, Mexico. July, 1912. (E. A. 
Schwarz.) [United States National Museum.] 
* See Hebard, Proc. Acad. Nat. Sci., 1917, p. 238, (1917). Females of both 
species have been recorded by Burr as Vostox similis, Can. Ent., xlvi, p. 275, 
(1914). 
