648 MR. P. D. MONTAGUE ON THE 
ORTHOPTERA. 
The Orthoptera, as is usually the case in warm and arid 
localities, comprise a large and characteristic section of the insect 
fauna of the Monte Bello Islands. There are few species, but of 
those that do occur, some are extremely abundant. The larger 
winged species are mostly of wide distribution, but the smaller 
wingless forms comprise several undescribed (¢) species. 
The aeridiids include such forms as the large Cyrtacanthus 
guttulosa, which occurs in great numbers upon all the islands, 
forming the main food-supply of the larger Reptiles. This insect 
is capable of prolonged flight, though it is only upon rare occasious 
that it exerts this faculty, and then can be observed flying in 
swarms through the Spinifex, usually about sunset. The ‘ Blue- 
winged Locust,’ Coryphistes cyanopterus Charpentier, also occurred 
but the examples were mostly of small size. The species is of 
wide distribution. Another large form, Acridiwm maculicollis, 
was also recorded, though it was not common. 
Of the mantids, only two were met with in numbers, 
Archimantis brunneriana Sauss., a North Australian species, and 
a smaller species of the genus Orthoderides, near O. ministralis 
Fabr., but as yet undetermined. This insect was always found 
upon the foliage of Wyoporum acuminatum, the leaves of which it 
closely assimilates both in form and colour. 
Three species of cockroach were obtained, two of them identical 
with, or closely allied to, Periplaneta concolor Walk. and 
Ellipsidron inquinata Walk., and the third apparently a new 
species of the genus Polyzosteria. One female phasmid was 
also obtained, clearly a form of or closely allied to Wyrtacus 
entrachelia (Westwood). 
HYMENOPTERA. 
The species of Hymenoptera from N.W. Australia are little 
known. Consequently any geographical conclusions based on 
collections from Monte Bello are likely to be erroneous. The 
following is a provisional list showing the type of the fauna, but 
the ants have been omitted. 
1. PARACOLLETES PERFASCIATUS Cock. 
This species has been identified by Mr. G. Meade-Waldo, British 
Museum, who contributes the following note. 
“The type of this species, described by Cockerell (Ann. Mag. 
Nat. Hist. (7) xvii. p. 25, 1906) from a specimen in very pocr 
condition, has ‘Western Australia’ as its only locality. It may be 
useful to give a few remarks on the pubescence, which is 
much spoiled by wetting in the type. For structure, Cockerell’s 
description is excellent. The thorax in fine fresh specimens is 
densely clothed with brownish-buff pubescence, thickly inter- 
