1921.] 
Natural-history Notes. 
803 
halteres pale yellow. Legs tawny and bristly ; large bristles distally on 
anterior femora ; all the tibiae with apical bristles ; coxae with long bristles ; 
posterior protarsus a little longer than the following joint. Wings clear, 
vein Ed very short appearing as vein Sc and meeting the costa considerably 
before the middle ; costa ends at vein R4+5 ; vein Sc rudimentary and 
evanescent distally ; cells M and 1st M2 confluent ; cell Cu present. 
Abdomen bristly, the bristles longer along posterior margins of the 
segments ; each segment tawny but with black areas as shown in fig. 4. 
Length of S and $ 3 mm. 
Syntypes No. 1240. 
Fig. 2.— Leucophenga atkinsoni ; chaetotaxy of head (dorsal view). 
Fig. 3.— Leucophenga atkinsoni ; chaetotaxy of dorsum of thorax. 
Fig. 4.— Leucophenga atkinsoni ; abdomen. 
Habitat. —A very common fly, particularly during the autumn ; it may 
be found in large numbers in shaded and moist places. The larvae, which 
breed in various species of Agaric , are pearl-white with a shiny black head ; 
on the underside of the abdominal segments is a transverse cup-like ridge 
armed with minute curved black spines, acting as locomotory organs ; 
the posterior and anterior “ lip ” of the posterior and anterior “ prolegs ” 
respectively is unarmed. The larva when fully grown is elongate and 
narrow, and measures up to 8 mm. in length. Pupation occurs in the ground 
amongst decaying vegetation. 
The Occurrence of Cylichnella arachis (Q. & G.) in New Zealand 
Waters, by Miss M. K. Mestayer, Dominion Museum. 
In the type molluscan collection at the Dominion Museum there are four 
specimens of Cylichnella marked as types of T. W. Kirk’s Cylichna zea- 
landica. These were recently examined by Mr. C. Hedley, who identified 
the three smallest as Cylichnella thetidis (Hedley), and the largest as 
Cylichnella arachis (Q. & G-.). The latter proves by measurement to be 
the type of Cylichna zealandica T. W. Kirk.* All four specimens were 
obtained at Waikanae. 
Suter states that Cylichnella arachis (Q. & Gr.)f does not occur in New 
Zealand waters ; but this is a mistake, as a careful examination of material 
* Trans . N.Z. Inst., voL 12, p. 307, 1880. 
f Man. N.Z. Moll., p. 520, 1913. 
