258 Mr. R. Shelford’s Studies of the Blattide. 
antennee with basal half incrassated, black, a luteous band occupying 
five joints beyond the middle. Prothorax luteous with a pyriform 
black central marking, the point directed backwards. Tegmina 
ferruginous at the base ; the mediastinal field hyaline, the marginal 
field flavo-hyaline with intervenular streaks of opaque testaceous ; 
apex of tegmina flavo-hyaline, the veins ferruginous, Wings flavo- 
hyaline. Legs, abdomen, and cerci bright luteous, the coxee at their 
extreme bases outwardly tipped with black and with pale borders. 
Cerci elongate. Supra-anal lamina triangular, produced. 
Total length 12 mm. ; length of tegmina 10 mm. 
Three examples (W. F. H. Rosenberg coll., Dec. 1896). 
(Oxford Museum.) 
Named after Mr. Malcolm Burr to whose generosity the 
Oxford Museum owes a magnificent collection of exotic 
Orthoptera. 
The species ditfers from P. angusta, W1k., in the follow- 
ing points:—The less extent of the white band on the 
antenne, the different shape of the black disc of the 
pronotum, the testaceous stripes on the tegmina. 
16. P. discicollis, Burm. (MeExico.) (Plate, XIV, fig. 2.) 
Blatta discicollis, Burmeister, 1.c.. p. 1012 (1838); de 
Saussure, Mém. Mex. Blatt. p. 114 (1864). 
Thyrsocera discicollis, Brunner, |. c. p. 128, n. 10 (1865). 
Thyrsocera laticornis, var., de Saussure and Zehntner. 
Biol. Centr.-Amer. Orth. 1, p. 32, n. 2 (1893). 
This is a very well-marked species, and the most robust 
of the genus. The type, of which I have a drawing, is at 
Berlin; another example is in the collection of Central 
American Orthoptera in the British Museum, and stands 
under the name of P. /aticornis, Perty ; a third, from which 
the following description is drawn up, is in the Oxford 
Museum. 
9. Head and mouth parts black, antennze mutilated (in the 
type, very long, black at base with a testaceous annulus occupying 
nineteen joints about the middle of total length, beyond the middle 
fuscous). Pronotum almost orbicular, but truncate in front, not 
covering the vertex and produced behind, dise piceous with broad 
lateral borders of orange-yellow, the posterior border margined 
with a fine yellow line; the black of the disc which just fails to 
meet the yellow anterior margin is narrowed anteriorly. 'Tegmina 
