FIJI-NEW ZEALAND EXPEDITION 135 
Centipedes are of frequent occurrence but I saw no large ones; 
a moderate sized species is found in woodland, under dried cow 
dung and in piles of newly threshed rice. 
Practically all the orders of insects are represented and it is 
interesting to note that at least some of the forms that occur in 
Iowa occur also in Fiji. With the continual increase in the acre- 
age given over to cultivation, a corresponding increase in damage 
done by insects has become apparent, and control measures for 
certain cane, banana and coconut pests are now being advocated. 
An illustration of the extensive distribution of one of our simp- 
lest insects is afforded in the well-known fish-moth (Lepisma sac- 
charina). This thysanuran occurs abundantly and its destructive 
qualities are as apparent in Fiji as in the United States. Spring- 
tails (Collembola) also, are very common under rocks, sticks and 
logs in damp places and often in turning over such objects a per- 
fect shower of these little insects greets the collector. They are 
furnished with a delicate, flexible, chitinous structure near the tip 
of the ventral side of the abdomen by which they can leap several 
inches into the air; it is from this structure that their common 
name is derived. 
Owing to the abundant rainfall in the vicinity of Suva there 
are many small streams and ponds which offer excellent breeding 
places for dragon flies (Odonata). At Navua in particular, mem- 
bers of this group were numerous. 
The commonest neuropteron is the lacewing (Chrysopa sanvito- 
rest) which is often found on guava. The larve feed on scale in- 
sects of which something like twenty species of these more or less 
destructive forms are found in Fiji. Another small brownish 
chrysopid was taken in the dense bush at Tamavua. 
The order Orthoptera is well represented. Locustids in all 
stages were common at Navua on June 29. A large conocephalid 
was taken frequently. In fields bordering cane patches and on the 
high para grass which has been introduced into Fiji to furnish 
food for live stock, and which flourishes to a marked degree along 
streams and drainage ditches, a large green acridiid occurred in 
numbers. Several other species of grasshoppers were taken. Grouse 
locusts frequent the vegetation of roadside ditches and damp sit- 
uations. I came across no particularly striking forms. 
Under the loose bark on trees and dead stumps a big black 
brachyelytrous cockroach is common. At Makuluva, Nukulau, 
Tamavua and Viria it was encountered in all stages of develop- 
