56 First Report on Economic Zoology . 
Lucilicc ccesar , Linn., also lays its eggs on wounds ; probably the 
sheep-fly, L. sericcctcc, Meig., does the same. 
The Senegal or Cay or Fly ( Ochromyia antliropophaga, Blanchard). 
The larvae or Cayor worms develop beneath the skins of man and 
animals and often produce serious Myiasis in Senegal. Derrnatobia 
noxialis, Goudot, also lives beneath the skin of man as well as 
animals, occurring from Mexico to Brazil. It is known under a 
variety of names, such as the Macaw worm in Cayenne, the Ura in 
Brazil, the Torcel at Costa Rica, the Mozoquil worm in Mexico. 
The Maggot Fly of Natal ( Auchmeroyia (B eng alia) deprcssa, 
Walker), also produces serious cutaneous Myiasis ; this pest is one of 
the Sarcophagidte. It is not restricted to Natal, but occurs further 
up the coast, having been recorded from Delagoa Bay. The range of 
this serious cutaneous parasite seems to be limited to the coast and 
no further inland than 1000 feet elevation. It is common from the 
Tugela downwards (vide Agri. Journal, Natal Dept. Agri. and Mines, 
vol. iv. p. 606, 1901. C. Fuller). Vide also note on Screw Worm 
(p. 131). 
Correspondence on the Mosquito Annoyance at 
Blackheath. 
The following letter was received on November the 6th, 1901, 
from the Public Health Department, Borough of Greenwich : — 
Dear Sir, — Complaints have been made to my Committee respecting 
the inconvenience caused to the inhabitants in this neighbourhood bv the 
bite or sting of insects found in the neighbourhood of Greenwich Park and 
Blackheath, popularly supposed to be mosquitoes. I shall esteem it a 
favour if you can give me any information you may have respecting this 
class of insect found in that immediate neighbourhood. 
I am, etc., 
Ernest George Annis, M.R.C.S., etc., etc., 
Medical Officer of Health. 
To F. V. Theobald, Esq., 
Natural History Museum. 
To Dr. Ernest George Annis, M.R.C.S., etc., 
Medical Officer of Health, Greenwich. 
Dear Sir, — It is somewhat difficult to answer the questions in your 
letter re the annoyance caused by biting insects reported to your Com- 
mittee without seeing actual specimens of the pests. 
