80 Transactions. — Zoology. 



Ccelopa littoralis. 



€. littoralis, Hutton, Cat. Dipt. N.Z., p. 69 (1881) ; Hudson, 

 Man. N.Z. Ent., p. 63, pi. vii., fig. 13. 



Vertex nearly black, the ooellar triangle brown, face grey ; 

 antennae and proboscis reddish- brown. Thorax brown, the 

 sides and lower surface grey. Abdomen greyish-brown. 

 Legs pale-brown, the upper surfaces of the femora dark- 

 brown. Halteres yellow. Wings slightly tinged with brown; 

 the veins brown. Length, J 1 5|mm., 5 7 mm.; wing, 

 $ 5 mm., J 6 mm. 



Hab. Wellington ; on the sea-beach. 



The body is slightly and the legs very hairy. The face is 

 deeply concave, and has but few hairs. The thorax is not 

 very flat. The chief cross-vein lies just opposite the end 

 of the first longitudinal ; the distance between the two cross- 

 veins is about twice the length of the posterior cross-vein, 

 and the distance of the latter from the margin is about one- 

 half of its own length. 



Coelopa monstruosa, sp. nov. 



Colours like the last, but the legs redder brown. The 

 middle legs elongated, considerably longer than the hind 

 legs, and their tibiae and tarsi thickly clothed with long hairs. 

 Length, 8 mm.; wing, 8£mrn. 



Ilab. Portrose, Southland (Mrs. Has well). 



The elongated middle legs seem adapted for swimming 

 or walking on water. The chief cross-vein lies just outside 

 the end of the first longitudinal ; the distance between the 

 two cross- veins is about two and a half times the length of 

 the posterior cross - vein, the distance of which from the 

 margin is about half its own length. 



Family HELOMYZIL\E. 



" Neuration of the wings complete; costa bristly; first 

 longitudinal vein not abbreviated, but bare ; the auxiliary vein 

 often approximated to it. Front bristly on its upper side 

 only ; a strong bristle on each side of the anterior border of 

 the mouth. All the tibiae with spurs and with an erect bristle 

 on the outer side before their apices " (Loew). 



Key to the Genera. 



Third joint of the antennae oval . . . . . . . . Helomyza. 



Third joint of the antenmB nearly ciroular . . . . Leria. 



Genus Helomyza, Fallen (1839). 

 Antennae rather short, the third joint oval ; arista plumose 

 or pubescent. Wings moderately long, the costa setigerous, 

 Legs hairy, with a few bristles. Abdomen linear in the male, 



