428 
MEXICAN DERMAPTERA 
Orizalia, Vera Cruz, Mexico, I, 9 to 16, 1892 and XI, 1887, 
(Bruner; Osborn), 43 80 9 , 21 juv. 
Cordoba, Vera Cruz, Mex., XII, 6, (F. Knai)),l cf, [U. S. N. M.]. 
The male forceps are found to vary from very weakly to 
strongly bowed: in the former type the heavy ventro-internal 
tooth is situated mesad or meso-proximad; in the latter this 
tooth is situated distad or meso-distad. The extremes, and an 
almost intermediate condition, are about equally represented in 
the series, the majority of intermediates have the ventro-internal 
tooth distad or meso-distad. The dissimilarity in general ap- 
pearance, caused by this feature, is very great. In all the adults 
before us, the wings are fully developed, in some of the females 
being somewhat shortened, with exposed portion shorter than 
the length of the pronotum. 
In this series the general coloration varies from cinnamon brown 
to almost black. The exposed portions of the tegmina are immac- 
ulate, or have a small, buffy proximal area, this varying indi- 
vidually in extent, but usually very small. 
Paracosmia g^losa (Scudder) 
1876. Ancistrogaster gvlosa Scudder, Proc. Bost. Soc. Nat. Hist., xviii, p. 259. 
[Puebla (terra frigida), Mexico.] 
Through the kindness of Dr. Samuel Henshaw, we have before 
us four niales and one female, cotypes, of which we select a 
large male as the single type, the female as the allotype. 
These specimens were taken by Sumichrast, in the month of 
January. 
The species is closely related to the genotype, silvestrii, differ- 
ing mainly in the presence of fully developed wings. It is possible 
that large series will show that in this group individuals of the 
same species may have fully developed, reduced or absent wings, 
in which case silvestrii will probably be found a synonym of 
gulosa. 
The proportionately much larger pronotum, which is much 
wider than the dorsal width of one of the tegmina, readily dis- 
tinguishes individuals of both sexes from those of the Mexican 
species, Ancistrogaster spinnx and A. uncinatus. 
*® Rehn, in 1903, recorded males with forceps slightly bowed as Ancistrogaster 
tolteca, those with forceps strongly bowed as Ancistrogaster gulosa. 
