46 Lieut.-Colonel C. T. Bingham on 
Although these animals are quite interesting, especially the - 
shrimp, I am afraid that they are of little or no value for the 
explanation of the origin of the fauna of the Elephant Lake. 
Both species occur in other fresh waters * in the Cameroons. 
The crab may easily ascend a river, although its water should 
run somewhat swiftly, and even cataracts might be avoided 
by them in walking on land. The shrimp may not have the 
same faculty, but my friend Professor Y. Sjéstedt, who, from 
his two years’ stay in the Cameroons, is thoroughly ac- 
quainted with the prevailing conditions, has told me that the 
shrimps are much esteemed by the negroes, who catch and 
eat them, transporting them alive in baskets from one place 
to another. he possibility is therefore not excluded that 
the shrimps have been introduced into the Elephant Lake by 
the natives. 
III.—On the Hymenoptera collected by Mr. W. L. Distant 
an the Transvaal, South Africa, with Descriptions of sup- 
posed new Species. By Lieut.-Colonel C. I’. BINGHAM. 
[Continued from vol. x. p. 222.] 
Family Eumenide (cont.). 
Genus ODYNERUS (cont.). 
Odynerus (Pterochilus) insignis, Sauss. 
Pterochilus insignis, Sauss. Etud. Fam. Vesp. ii. (1856) p. 324, pl. xv. 
fig, 12, 2. 
A single male without locality. Described originally from 
the Cape. 
Genus Synacris, Latr. 
Synagris cornuta, Linn. 
Vespa cornuta, Linn, Syst. Nat. ed. xii. (1767) p. 951. 
Apis cornuta, Drury, Illustr. Nat, Hist. ii, (1778) p. 88, pl. xlviil. 
fig. 3. 
Synagrus cornuta, Latr. Hist. Nat. Crust. et Ins. ii. (1802) p, 360. 
Synagris cornuta, Latr. Hist. Nat. Ins. xii, (1805) p. 344, 
One female, Isubu. 
* Fyom the Meme River I received at the same time specimens of the 
same species of shrimp, although not so large, together with examples of 
P. (B.) acanthurus and Olfersi. 
