Introduction . 
• • • 
XXXI 11 
Hexapoda — continued books and papers damaged by book-worms (Atropos 
divinatoria ) and by Chelifers or tailless scorpions in 
India, also by Lepisma. Clothing also damaged in 
India by Anthrenus vorax. 
Chilopoda and Diplopoda None. 
Tunicata to Birds None. 
Mammalia Mice and rats (occasionally). 
Survey of Sub-group G. 
ANIMALS INJURIOUS TO MAN’S FOOD AND OTHER STORES. 
Protozoa to Crustacea None. 
Acarina A few acari attack food — household mites ( Olyciphagus ) ; 
cheese mites ( Tyroglyphus ) ; sugar mites ( Olyciphagus ). 
Hexapoda Numerous insects attack man’s food and other stores, 
both dry goods and fresh — corn weevils ( Calandra ) ; 
bacon beetles (Dermestes) ; cheese fly ( Piophila ) ; blow 
flies ( Calliphora ) ; cockroaches ( Blattidse ) ; cigar 
beetles ( Lasioderma ) ; drug beetle {Anobium paniceum) ; 
death-watch {Atropos divinatoria ) ; silver fish (Lepisma). 
Chilopoda and Diplopoda None. 
Mollusca Slugs attack corks. 
Tunicata to Birds None. 
Mammals Rats and Mice. 
GROUP G. 
Animals which are known as “Beneficials” on account of their 
being destructive of or checking the increase of the 
injurious Animals classed under Groups D, E, and F. 
The animals falling in this group, spoken of as a rule as “ natural 
enemies,” are best treated in connection with the pests enumerated in the 
groups D, E and F. They may be beneficial, either by (i) being pre- 
daceous, or (ii) being parasitic upon the pests of crops, animals, and man. 
Survey of Group G. 
Protozoa None. 
Porifera to Echinoderma None. 
Platyhelmia Parasitic cestodes help to keep down certain noxious 
birds and mammals (rabbits, sparrows, and others). 
Nemertina None. 
Nematoda Act the same as Platyhelmia. 
Crustacea None?. 
Arachnida Spiders by destroying noxious insects ; mites (Der- 
manyssus) by being parasitic on destructive birds. 
Hexapoda Many insects prey upon other insect pests. Hover flies 
( Syrpliidse ) and lace- wing flies ( Hemerobiidse ) feed upon 
Aphides ; dragon flies ( Odonata ) upon mosquito larvae, 
butterflies, etc. ; carnivorous ground beetles (Carabidee, 
etc.), lady birds ( Goccinellidx ) upon Aphides and scales. 
C 
