20 
PACIFIC SCIENCE, Vol. IX, January, 1955 
Type species: A. muscaria Westwood. 
Westwood writes: 
Genus novum Panopi et Lasiae affine, differt antennis 
apice longe aristatis; proboscide longitudine mediocri, 
cellulis duobus posticis basi a venula unica basali 
pedicellatis. 
Caput rotundo-transversum; oculis maximis antice 
conjunctis, setosis. Ocelli 3 in tuberculum parvum 
positi, verticales. Antennae in medio faciei insertae, 
articulis duobus basalibus parvis, ultimo basi elongato- 
ovato, apice in setam longam tenuem producto. Pro- 
boscis elongata, thoracis longitudine, apice bilabiato. 
Alae venis fere ut in Lasid et Panope dispositis, cellula 
autem curvata apicali e venula tertia postcostali pone 
cellulam angustam mediam discoidalem emissa; cellu- 
laque triangulari etiam basi pedicellata. Pedes graciles; 
abdomen fere globosum. Color metallicus. 
Apsona muscaria Westwood 
1876. Ent. Soc. London, Trans. 1876: 510. 
(pi. 5, fig. 2). 
Westwood writes: 
Valde convexa, nitida, sublente tenuissime coriacea, 
cupreoviridis, luteo-pubescens, proboscide et antennis 
nigris, pedibus luteoflavis, femoribus in medio ob- 
scurioribus; alis hyalinis, venis nigris. 
Long. corp. lin. 4; probosc. lin. 2; expans. alar, 
lin. 8V2. 
Habitat in Nova Zelandia. In mus. Hopeiano 
Oxoniae. 
Body metallic green, shining. Legs (ex- 
cluding coxae) , halteres and anterior spiracles 
yellow, proboscis brown. Whole body, in- 
cluding eyes, with very dense, erect, yellowish 
hairs. Squamae alaris transparent, with yellow 
rim and also yellowish-haired. Empodium and 
pulvilli of same size, form and colour, yellow- 
ish. Wings with a very well developed vena- 
tion, only the branches of M towards the hind 
margin evanescent. Alula absent. Anal cell 
long, petiolated. Lower basal cell M is dis- 
tinctly narrower and longer than the upper 
basal cell R. Fourth posterior cell (subdiscal) 
is triangular, petiolated at base, connected to 
the hind margin by a short vein. Discal cell 
extremely long, slightly broadened towards 
the apex. Both branches of R4 and R5, short - 
petiolated. First posterior cell is extremely 
long, the cross-vein r-m is beyond the apex 
of the discal cell, another cross-vein is situ- 
ated at its base. 
The author has seen specimens from Ar- 
thur’s Pass, New Zealand, 23. i. 1928 (A. 
Philpott). 
A comparison with Eulonchus smaragdinus 
gives many details of this species, which were 
absent in the short description of Westwood. 
1. Proboscis in Eulonchus is extremely 
long, in normal position directed back- 
wards under the body and protruding 
beyond the apex of abdomen on the 
side of abdomen, in Apsona it does not 
reach the apex of the abdomen. This 
character cannot be regarded as generic 
because the length of proboscis is vari- 
able in Diptera in both sexes and in- 
dividually rather strongly, so the struc- 
ture of proboscis and palpi is quite 
similar in both species. 
2. Head in Apsona is more declined than 
in Eulonchus , in which it has a nearly 
normal position in relation to the 
thorax. 
3. Face in Eulonchus is turned downwards, 
in Apsona in oblique position. 
4. Antennae in Apsona are inserted at a 
distance from the ocellar triangle, about 
as long as the latter, in Eulonchus nearly 
in the middle between the ocelli and 
the mouth. 
5. Extremely fine strip separates the eyes 
above and below the antennae in Eu- 
lonchus, in Apsona they touch below the 
antennae. 
6. Ocellar triangle is short, high, prom- 
inent in Eulonchus , in Apsona longer, 
broader and flat. 
7. Occipital part of head in profile is very 
narrow above in Apsona, in Eulonchus 
it is rather broad. 
8. In Eulonchus all tibiae on outer side have 
an acute prolongation of the edge, in 
Apsona the edge is nearly round. 
9. Subdiscal cell is touching, basally, the 
lower basal cell in Eulonchus, in Apsona 
it is separated from the lower basal cell 
by a rather long petiole. 
10. Tergites in Eulonchus with very short 
