Minutes of Proceedings. Xxiil 
ovaries are of a very large size, and arranged in a spiral manner, in 
which the larve are developed, sometimes to the number of 20,000, 
according to De Geer. 
From among the lifeless hodies of young locusts he had secured a 
larva, which has now turned into a pupa and which will eventually 
turn into a perfect fly. 
The first and only example of this fly in the South African 
Museum was captured in Damaraland where the locust Pachytilus 
capensis is so to say endemic. As a matter of fact, had proper 
researches been made here in a systematic manner into the economy of 
the locust, it would probably have been found that the present swarms 
have originated in certain dry arid spots, possibly at or about north of the 
Orange River. The presence of that parasitic fly, first recorded from 
Damaraland and now found at Graaff-Reinet, seems to justify the 
assertion that the fly in this case follows the bost intended for its 
young. 
The Secretary then read Mr. A. W. Roberts’ paper on “ The Com- 
putation of an Orbit of the Companion of Sirius.” 
Dr. Gill congratulated the Society on receiving its first paper on 
Mathematical Astronomy from a member unconnected with the Cape 
Observatory. ‘ 
Dr. Gill read a note on the recent Lunar Eclipse, and described the 
methods and aim of the observations of the Occultations of Stars 
observed during the Kelipse. 
Ordinary Monthly Meeting. 
WEDNESDAY, JANUARY 27, 1892. 
Mr. D. Git1, LL.D., F.R.S., PRESIDENT, IN THE CHAIR. 
(By invitation of Dr. Gill this meeting was held at the Royal 
Observatory.) 
Mr, A. W. Roberts was elected an Ordinary Member of the Society. 
The President, Dr. Gill, gave an account of the steps which had 
led to the adoption of the Meridian 224° East of Greenwich as the 
Standard Meridian of the Colony. 
He expressed regret that Government had not adopted the Meridian 
of 30°, é.e., 26°s East of Greenwich, so as not only to be in accord with 
