( xiii) 
of M. unipunctana, which has a nearly white male and a grey 
female.” 
Mr. Gawan exhibited a locust, Acridium cgyptium 
= tartaricum), taken in a house in Hanover Square, and 
probably imported in vegetables. 
Mr. KirKaupy exhibited specimens of water-bugs, including 
Enicoeephalus culicis (Uhl.) and Gerris robustus (Uhl.), both 
taken for the first time in Mexico, by Prof. Carl Baker ; also 
a male of the extraordinary Rheumatobates rileyi, Bergr., from 
New York State, TZrepobates pictus, Herr.-Schiff., from 
Alabama, and Gerris aspera, Fieb., from Scotland. 
Mr. Cuampion showed specimens of Helota kolbei, Rits., and 
H. fulviventris, Kolbe, from Haining, China, and of Apogonia 
eribricollis, Burm., from Hong-Kong, all captured by Mr. 
J. J. Walker, during the voyage of H.M.S. ‘ Penguin.’ 
A discussion arose on the reported occurrence of the San 
José scale, Aspidiotus perniciosus, in Great Britain. 
Mr. R. Newsreap stated that, during nine years’ work on 
Coccide, he had never once met with this species among 
scale-insects taken in this country and sent to him for 
identification. It was impossible even for an expert to dis- 
tinguish it, without careful microscopical preparation and 
examination, from among the thirty or more known species 
of Aspidiotus, and any attempt to identify it on imported 
fruit by naked-eye observation, or with a hand-lens, was there- 
fore quite impracticable. The risk of its distribution by being 
imported on fruit was small; there was, however, much more 
likelihood of its introduction on plants. 
At the same time, he saw no reason to suppose that it 
would be more injurious in this country than the common 
Mytilaspis pomorum (Aspidiotus conchiformis, Curt.) ; in 
America the San José scale had several generations in the 
year, sometimes as many as five, but in this country it would 
probably conform with the habits of all other scale-insects at 
present investigated, and become single-brooded, by which 
modification its powers of multiplication would be materially 
diminished. 
Subsequent speakers agreed with Mr. Newstead’s con- 
clusions, and the encouragement of a panic, such as had 
