252 Mr. R. Shelford’s Studies of the Blattide, 
trouble to determine with accuracy those species that are 
contained in the Oxford Museum, and I think that the 
subjoined list and notes made in the course of my labours 
may be of assistance to other workers in this order of 
Insects. I should like to record here my grateful thanks 
to Dr. O. Taschenberg of the Halle Museum who kindly 
lent me the type of P. afinis, Burm.,and one or two other 
interesting examples of the genus; also to Dr. A. Brauer 
of Berlin for admirable drawings of the types of P. flavipes, 
Burm., P. annulicornis, Burm., Blatta discoidalis, Burm., 
and B&B. discicollis, Burm. 
LisT OF SPECIES OF THE GENUS PSEUDOMOPS, Serv. 
I. CERCI not spatulate. 
1. P. oblongata, L. (SURINAM.) 
Blatta oblongata, Linnzeus, Syst. Nat. (ed. x), 1, p. 425, 
n. 9 (1758); De Geer, Mém. Ins. iii, p. 541, pl. 44, 
ft, Dl 3). 
Thyrsocera oblongata, Burmeister, Handb. Ent. ii, p. 449, 
n. 8 (1838). 
In spite of de Geer’s admirable description and readily 
recognizable figure, subsequent authors have confused 
another species, P. intercepta, Burm., with this, explaining 
discrepancies in appearance as due to variability; the 
pattern of the pronotum is so different in the two species 
that I see no valid reason for confounding them. The 
general colour of the insect is fulvous and the disc of the 
pronotum is marked by two dark points which may be 
joined and by a crescentic dark band near the posterior 
margin. 
2. P. intercepta, Burm. (MEXICO, GUATEMALA, HON- 
DURAS.) 
flatta intercepta, Burmeister, |. c. p. 497, n. 10 (1838) ; 
de Saussure, Mém. Mex. Blatt, p. 113 (1864). 
Pseudomops oblongata, Serville, Ins. Orth. p. 115 (1839). 
Thyrsocera oblongata, Brunner, Nouv. Syst. d. Blatt. p. 
121, n. 8, pl. ii, f 11 (1865); de Saussure, Miss. Mex. 
Orth. p. 50, pl. i, f 29 (1870); de Saussure and 
Zehutner, Biol, Centr,-Amer, Orth. 1, p- 32, n. 3 (1898). 
