Mr.:R. Shelford’s Studies of the Blattide. 259 
dark fuscous, mediastinal field at apex testaceous, fifteen costal 
veins, discoidal field with nine longitudinal sectors, wings fuscous. 
Abdomen, cerei and legs dark fuscous, cox outwardly margined 
with whitish. Supra-anal lamina quadrately produced. 
Total length 19°5 mm.; length of tegmina 15 mm.; pronotum 
5 mm. x 6 mm. 
17. P. gueriniana, Sss. (MEXICO.) 
Thyrsocera gueriniana, de Saussure, Rev. Zool. (2) xiv, 
p. 168 (1862); Mém. Mex. Blatt. p. 124 (1864); 
Miss. Mex. Orth. p. 50 (1870); Brunner, l.c. p. 126, 
n. 19 (1865). 
The type is in the Paris Museum. 
18. P. obscura, Sss. (BOLIVIA, SANTA CRUZ.) 
Thyrsocera obscura, de Saussure, Miss. Mex. Orth. p. 52 
(1870). 
The type is in the Paris Museum. 
19. P. magna, n. sp. (ECUADOR, Paramba.) 
¢. Entirely black, except a testaceous band on the antenns 
beyond the basal incrassated portion and the testaceous terminal 
three joints of the cerei which are not spatulate ; an orange patch in 
the middle of the ventral surface of the abdomen. The borders of 
the cox are not white, and the mediastinal area of the tegmina 
is not hyaline. Body depressed. {Posterior border of prothorax 
obtusely rounded. @. Like the male but without the orange patch 
on the abdomen; the supra-anal lamina is triangular, its apex 
slightly incised. 
Total length. Length of body. Length of tegmina. 
ae 18 mm. 15°6 min. 14 
OF 18 mm. 14 mm. 13°5 
One male and two females (W. &. H. Rosenberg coll. 
February and May 1897). (Oxford Museum.) 
20. P. albostriata, n. sp. (ECUADOR, Cachabi.) 
2. Black ; antenne beyond the penicillation, with a testaceous 
band occupying nine joints. Pronotum quite black except for a very 
narrow border of testaceous, not occurring on the front margin ; the 
