136 Dr: B. PB arov's Notes on the 
didymus is most certainly not the species so named by 
Thunberg and Stil (see below). I. Bolivar has recently 
made an attempt to divide this genus into two, and de- 
scribed the new genus T'ropidiopsis, to which some species 
of Tylotropidius ought to be transferred, but he himself 
has not given lists of species belonging to the one and the 
other of these genera. : 
In consequence I am not quite certain of all my identifi- 
cations of the species in the Museum collection. 
1. Tylotropidius speciosus (Walk.). 
1870. Heteracris speciosa Walker, Cat. Derm. Salt. B.M., 
iv, p. 661, no. 12 (larva). 
1899. T[ylotropidius| didymus Schulthess (nec Thunb., nec 
Stal). Bull. Soc. Vaud. Sc. Natur., xxxv, pp. 
210-212, figs. 1, la. 
It is evident that Schulthess described and figured in 
his revision not the species that Stil described as didymus 
Thunb., on the ground of Thunberg’s type, though Schul- 
thess himself says that he knows the species personally. 
That I am correct in this view may be proved by mere 
comparison of Stil’s description with the figure of pro- 
notum given by Schulthess; the lateral keels of pronotum 
in this figure are quite straight, while Stil says: “ margi- 
nibus lateralibus a basi primum leviter, dein ante medium 
fortius convergentibus,” 7. e. the keels are by no means 
straight in true didymus. 
The correct name for the species figured by Schulthess 
as didymus (and doubtless so identified by some later 
writers) is speciosus Walk., since Walker’s type of Hetera- 
cris speciosa, though a larva in the last instar, undoubtedly 
belongs to it. 
British Museum specimens: Sierra Leone, 1 @ larva 
(Walker's type); Uganda: Entebbe, Bweya, 15 go, 
29 9° (C. C. Gowdey); Uganda, Busoga, Kamuli (H. 
Mathers), 1 3; Uganda, Parder distr. (W. P. Lome), 1 9. 
2. Tylotropidius varicornis (Walk.). 
1870. Heteracris varicornis Walker, Cat. Derm. Salt. B.M., 
lv, p. 667, no. 25. 
1893. Tylotropidius ceylonicus Brunner Watt., Ann. Mus. 
Civ. Gen. xxxiii, p. 164, pl. v, fig. 57. 
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