294 Transactions. 
has only one clasper, and this is of quite a different structure from either 
of those on the left side; the aedoeagus is also of remarkable construction 
and very asymmetrical. the specimens are exactly alike, so that there 
can be no question of an accideiital deformity. Although some species of 
Gonomyia have an asymmetrical aedoeagus, this is the first Nematocerous 
Dipteron I have seen with asymmetrical claspers. The wing-hair is all 
dark, but varies in density in different parts, and there are areas in [s 
anal, and uisa cells which are devoid of hair. Length of body, 6 mm. ; 
5, 
Рена IsLaND : Karori and Wainuiomata, Wellington (G. V. Hudson, 
No. 135) ; three males and one female in British Museum 
Amphineurus horni n. sp. (Fig. 44.) 
Whole body rather dark brown; back of head darker; coxae, anal 
segment, and ovipositor lighter. Antennae missing. Thorax heavily 
dusted with brownish. Anal segment swollen and rather short. Anal 
valves of ovipositor about as long as the segment, rather stout, curved 
almost into a semicircle, scarcely reaching beyond tips of genital valves. 
Middle legs dark brown (front and hind legs missing). Wings with membrane 
and veins greyish, hair dark brown. All veins rather densely clothed with 
long hair; hairs of an equal lengths are also scattered rather thinly over 
whole surface. Venation almost as in Erioptera : т-т and Cu,, both meet 
M almost exactly at fork, and therefore form an obtusely-angled line. 
К+; strongly arched, a little longer than r-m and about two-thirds as 
ong as stem of cell M,. Ax rather short, very slightly arcuated, ending 
much before Cu,,. Length of body, 3-5 mm. ; wing, 5-2 mm. 
Norta Istanp: Wellington (G. V. Hudson, No. 1114); type female 
in Berlin-Dahlem Museum. I have pleasure in naming the species after 
. W. Horn, to whom I am indebted for the loan of several collections. 
"The position of this species in Amphineurus is somewhat uncertain, the 
venation approaching closely to that of Erioptera, and the long dense hair 
on the veins also suggesting an affinity with that genus. The some- 
what hairy wing-surface, however, excludes it from Erioptera, and, as the 
ovipositor has the same WORD gc as in A. bicinctus, it is probably correctly 
placed in Amphineu 
Genus Motopaiius Mg. 
his genus is readily distinguished by two peculiarities of venation— 
the cell В, g considerably longer than R,, and the cross-vein r-m 
being ulad far beyond the first fork of the ioci: ; in addition the long 
dense hair on the wing-veins will distinguish it from other New Zealand 
genera, though not from Erioptera. In regard to the first point, an approach 
is made to Molophilus by Amphineurus perdecorus, but no confusion need 
be caused on that account. The genus is a cosmopolitan one. 
The New Zealand species show some affinity—not, however, very 
striking—with those of Australia ; they are of quite a different type, in 
regard to ma markings and hypopygial structure, from those of the Palaearctic 
and Nearctic ае The following table will separate the known New 
Zealand form 
Y. Log ringed sis M © ae P 5 | 2 
Legs not ringed ee xs ee Cy pua 4 
2. Legs yale with black 1 rings .. A : 9s ia iegatus n. вр. 
Legs dark with white . 4 Ji р te "в" 2 
3. Metatarsi with a white .. multicinctus n. sp. 
etatarsi (at least on middle legs) without t white rin -.. infantulus n. 
uniformly dark B. ncm кы 
Legs yellow ; wings spotted .. A odes ae a pulcherrimus n. sp. 
y 
d 
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