Mr. R. Shelford’s Studies of the Blattide. 253 
Thyrsocera tolteca, de Saussure, Rev. Zool. (2) xiv, p. 168 
(1862); Mém. Mex. Blatt. p. 124, pl. i, f. 21 (1864) ; 
Brunner, |. c. p. 125, n. 18 (1865) 
I agree with Kirby in regarding this as quite distinct 
from P. oblongata, L.; de Saussure and Zehntner on the 
other hand sink it as a synonym of P. oblongata, L. Good 
figures of the species have been published, so that it can 
be readily recognized, 
3. P. inclusa, Wik. (BRAZIL, PERNAMBUCO.) 
Pseudomops inclusa, Walker, Cat. Blatt. B. M. p. 212 
(1868). 
Thyrsocera amena, de Saussure, Mél. Orthop. fase. iv, p. 
97 (1872). 
The species can easily be distinguished by the horseshoe- 
shaped dark mark on the pronotum. In some specimens 
this may be considerably reduced, but it is never entirely 
absent ; the dark shadings on the tegmina are subject to 
considerable variation. The type of inclusa is in the 
Oxford Museum. 
4. P. laticornis, Perty. (BRAZIL.) 
Blatta laticornis, Perty, Del. Anim. Art. p. 117, pl. 28, 
f. 4 (1834); Serville, 1. c. p. 116 (1839). 
Thyrsocera laticornis, Burmeister, |. c. p. 499, n. 6 (1838) ; 
Brunner, l.c. p. 123, ne El (1865) ; de Saussure, Miss. 
Mex. Orth. p. 51 (1870). 
Thyrsocera dubia, de Saussure, Rey. Zool. (2), xiv, p. 168 
(1862); Mém. Mex. Blatt. p. 123 (1864); Brunner, 
l.c. p. 124, -n. 12 (1865). 
Pseudomops concinna, Walker, |. c. p. 82, n. 20 (1868). 
Perty’s excellent figure is a valuable aid to the identifi- 
cation of this species ; from the Halle Museum I received 
two examples which I was able to identify without much 
doubt. The following is a short description of them : 
¢. Head red, shading to darker on the labrum, antennw black 
with a testaceous annulus occupying eight joints, base scarcely 
incrassated ; pronotum rufous shading to fuscous posteriorly, borders 
testaceous ; tegmina fuscous, distal half of mediastinal field and 
centre of marginal field testaceous; abdomen rufo-fuscous, cerci 
