51 
Hymenopterous primary model. Finally a beautiful little 
group of black red-tailed insects, including 2 different flies, 
a moth, and the Hymenopterous model. 
During 1904 Mr. Marshall added largely to the invaluable 
collection of specimens, proving the nature of the struggle for 
existence in S. African insects, which he had presented to the 
Department in previous years. The donation in 1904 con- 
sists of 31 sets of insect-fragments carefully extracted from 
the crops or stomachs of birds and from the faeces of lizards 
and mammals. Ten of these sets of fragments were ex- 
tracted from the following birds (omitting scientific names) :— 
Drongo, Weaver, Great African Crake, Corn-crake, Lark, 
Bush Shrike, Fly-catcher, Glossy Starling, Finch, Wood- 
pecker (July, 1g03-July, 1904). Eleven sets were obtained 
from the faeces of lizards of various kinds, possibly in one 
case from a toad (Oct. 1903-Mar. 1904): ten from faeces 
of the mongoose (Nov. 1903-June 1904). The locality in 
every case was Salisbury, Rhodesia. In spite of the frag- 
mentary character of the remains, Mr, Marshall has been able 
in nearly all cases to determine the species. 
Further additions to the bionomic series from the neigh- 
bourhood of Salisbury, are:—A Lamellicorn beetle tasted and 
rejected by Cercopithecus pygerythrus (Oct. 1903); a Bembex 
sp. and its Dipterous prey (Oct. 1903); a dragon-fly and its 
prey—a Galerucid beetle (Apr. 1904); 7 Asilid flies and their 
prey—an Ichneumonid (Apr. 1904), 2 Acridians (Nov. and 
Dec. 1903), a Fossorial wasp (Oct. 1903), a Coprid beetle 
(Mar. 1904), a small moth (Oct. 1903), a fly (Nov. 1903). 
The material bearing on two other observations of Mr. 
Marshall is also of deep interest from the same point of view: 
(1) a Locustid (He¢rodes), captured at Salisbury, April 2, 1904, 
in the act of devouring the larva of Limmnas chrysippus ; thus 
demonstrating one of the enemies of this highly protected 
much-mimicked species. (2) Three winged Termites found 
crawling on the ground after having been attacked by dragon- 
flies, and the whole of the abdomen eaten. Observed at 
Salisbury, at sunset, Nov. 12, 1903. 
K 2 
