GWAAI 
217 
THE RAILWAY JOURNEY FROM BULAWAYO TO THE VICTORIA 
FALLS. 
September 11th, 1905. 
Red Bank Station (19 miles from Bulawayo).—We took along¬ 
side the train Teracolus achine, Cram., a male; T. antigone, a male; 
and two fine specimens of Papilio angolanus , Goze (? corinneus , 
Bert.), which had probably been disturbed from the drippings of 
the water-tank. 
Saw-Mills Station, near Umguzi (57 miles from Bulawayo).— 
A male of Belenois mesentina, Cram., was netted, also a EToctua 
flying in the sun. The Red Locust, Schistocerca peregrina, was 
abundant; by great exertions we succeeded in catching two. 
Gwaai (89 miles from Bulawayo), lat. 19° 7' S., alt. 3240 ft.— 
Towards evening the train stopped in a stretch of flat, bare country 
beside a reedy pond to take in water. A fine specimen of Gharaxes 
saturmcs, Butl. (the only one we saw in our travels), was taken 
flying about a low tree by Dr. Dixey. We also took the brilliant 
cardinal-red Dragon-fly, Crocothemis erythraea , Brulle. Sweeping 
the rank vegetation by the pond yielded a multitude of small 
insects, amongst them a number of the singular Fly, Diopsis affinis , 
Adams, which carries its eyes and antennae upon long rigid stalks 
or horns projecting on either side of the head. [See Plate II., 
Fig. 5.] The appearance of these little black and red flies forcibly 
suggests a Watkin Range Finder in miniature, the eyes being so far 
separated as to afford an appreciable base-line; if the insect were 
resting on the underside of a stalk it would be able to see its 
enemies or prey above it without exposing itself. With the Diopsis 
were Mused (?) domestica , Sepedon sp. and other small flies; two 
small Scoliids, Myzine sp., in too bad condition to name; and other 
insects, including the Phytophaga, Raltica pyritosa, Erichs.; Hispa 
spinulosa , Boh. nec Schonh.; Chaetocnema sp.; two specimens of the 
Acridian, Paratettix scaler, Thunb., and a small moth, Eretmocera 
derogatella, Walk. 
An unnamed Geometer, the cosmopolitan Tineid, Plutella maculi - 
pennis, and the Cockroach, Paraplecta pallipes , Stal, all came to 
light in the train on the night of September 11th between Gwaai 
and Wankie. Mr. Shelford says that the Paraplecta was first received 
from Damaraland, but is very rare in collections. 
