286 Transactions. 
Discobola tesselata (Osten-Sacken.) (Figs. 33, 34.) 
Trochobola tesselata Osten-Sacken, Berlin. ent. Zeitschr., vol. 39, 
p. 266, 1894. 
Trochobola variegata Hutton, Trans. N.Z. Inst., vol. 32, p. 36, 1900. 
Limnobia tesselata Walker (nom. nud.), List Dipt. Brit. Mus., vol. 1, 
This species differs from all the others as yet known from New Zealand 
in the predominating light-ochreous colour of thorax and abdomen.  Prae- 
scutum has four dark stripes, middle pair narrow and widely separated; 
postnotum has a blackish band down middle. Hypopygium has claspers 
resembling those of Dicranomyia—a slender, curved, horny upper pair, and 
a fleshy lower pair provided with an inwardly-projecting rostrum ; rostrum 
it has not the strongly produced praescutum of that species, and differs 
in many details of coloration. 
The name tesselata must be attributed to Osten-Sacken, who gave a 
very brief diagnosis of Walker’s specimen ; this was just sufficient to 
a : 
n 
and the European D. annulata—more so than to any other New Zealand 
species. : 
Norra Istanp: Wellington district (G. V. Hudson, No. 229). Walker's 
specimen (a male) is unlabelled as to locality. There are also two females 
in British Museum, presented by Mr. Hudson. 
Discobola gibbera n. sp. (Fig. 29.) 
Head blackish, heavily dusted with dark отеу; front narrow, not more 
than one-tenth as broad as head. Probiscis and palpi blackish, about half 
as long as head. Antennae dark brown, second scapal joint light brown. 
Flagellar joints all about same length, but becoming gradually more slender ; 
basal joints very shortly oval; terminal joints rather elongate oval. Thorax 
d 
bases of segments. Ovipositor with anal valves curved, slightly shorter 
than last segment ; genital valves stout, rather blunt-ended, evenly taper- 
Legs ochreous; femora with a narrow black ring at tip; extreme 
tinge ; venation and markings as in fig. 29. Halteres ochreous at extreme 
base, then with rather broad blackish ring; apex of stem and base of 
knob pale ochreous, apex of knob blackish. Length of body, 9 mm.; wing, 
mm. 
SovTH ISLAND : Tisbury, 31st October, 1915 (A. Philpott); one female. 
Type in Cawthron Institute collection. 
Most nearly allied to D. australis Skuse, differing in leg-markings and 
some other points. From D. tesselata it differs in the more humped thorax, 
colour of pleurae and postnotum, femoral markings, &c. 
