44 SCIENTIFIC SURVEY OF NORWICH AND DISTRICT 
Millipedes.—Polydesmus complanatus, Brachydesmus superus, Attracto- 
soma polydesmoides, and all occur in the Broads district. Fulus subulosus, 
F. niger at West Runton, and F. punctatus (Broads). 
ARACHNIDA. 
The Arachnida of the county have not been worked to a very large 
extent, but the Victoria County History mentions the fact that 193 species 
have been placed to its credit. As the county possesses tracts of wild 
heathlands, some cultivated woodland districts, rich broadlands, and sea 
coast there are abundant opportunities for increasing the number of species 
recorded. 
Of the 188 species of spiders those deserving special mention on 
account of their rarity are: Attus caricis, Lycosa spinipalpis, Pardosa 
farenu, Pholcus phlangioides, Steatoda sticta, Asagena phalerata, Hiclaira 
uncata, Mengea scopiger, Araneus patagiatus and Clubiona neglecta. 
Among the Chelifers, out of 24 species of False Scorpions regarded 
as indigenous to Great Britain, Chthonius rayi, Chelifer latreilli and 
C. cancroides have been taken in the county. 
Phalangida (Harvestmen).—Phalangium opilio has been recorded from 
Scratby sand cliffs ; Liobunum rotundum, Oligolophus agrestis, Nemastoma 
lugubre and N. chrysomelas, all from Ormesby ; Megabunus insignis (West 
Runton). 
Hydracarina (Water mites).—These are much at home in the Norfolk 
broads and dykes where they have been studied by C. D. Soar who-with 
W. Williamson prepared the three-volume Ray Society Monograph (q.v.). 
He recorded 92 species for the county, some being new to science, as well 
as many new facts about their economy and life history. 
INSECTA. 
Norfolk is noteworthy for the number of enthusiastic entomologists 
which have specialised upon the various orders of insects to be found in 
the county, and for a detailed account reference must be made to the large 
amount of data available in the Transactions of the Norfolk and Norwich 
Naturalists’ Society. 
Thysanura.—The ‘ Fire brat,’ Thermobia domestica occurs commonly 
in bakehouses at Yarmouth, Norwich, and elsewhere. 
Collembola——Among the Springtails may be mentioned Anurida mari- 
tima which is found on debris along the tide marks. 
Orthoptera (Cockroaches, Crickets and Grasshoppers).—Ectobius 
panzert, a very small cockroach, lives in sandy places on heathland, often 
near the sea. Blatella germanica has been found in houses in Norwich, 
Blatta orientalis frequently occurs in farmhouses and bakehouses, Peri- 
planeta americana has occurred several times, probably introduced from 
ships and in imported fruit. 
Gryllotalpa gryllotalpa, the mole cricket has not been reported within 
recent years, Gryllus campestris, the field cricket is rare, but G. domesticus 
is very common in bakehouses. 
With regard to the grasshoppers, Phasgonura viridissima has appeared 
