FAU. MYCETOPHILID^ 
27 
Type species : .V. ni^i^-yesceiis, iNIarshall. 
Geographical distribution of species : 
I. A'', nigycscens, Marshall, Trans. New Zeal. Instit. Vol. 28(1895), p. 266, New Zealand, 
pi. 8. f. I (1896). 
14. Genus CASA, Hutton 
Casa. Hutton, Index Fauna Nov. Zeal. p. i33 (1904). 
Huttonia. Marshall (nec Cambr.), Trans. New Zeal. Instit. V^ol. 28 (1895), p. 267 (1896). 
Characters. — Head oval, almost round. Ejes emarginate, with a narrow line of division 
between them abo\'e the bases of the antennas. Palpi moderately long, four jointed; first joint very 
short, almost orbicular; second rather long and swollen, length about twice the breadth; third joint 
about as long as the second, narrow and cylindrical ; fourth joint slender, rather longer than the others. 
Front short. Ocelli three, nearly in a straight line, central one rather smaller than the others. Antennae 
about as long as the thorax, 2+ 16 jointed ; joints of the scapus cupuliform, about as long as broad, 
slightly setose; flagellum rather long, joints about twice as long as broad, pubescent, a few setae situated 
near the middle point of each joint, terminal joint very small and nipple-like. Thorax highlj' arched, 
pubescent, with setas on lateral margins. Scutellum small, semicircular, with sette on hind margin. 
Metathorax acclivous. Abdomen slightly flattened, seven segmented, narrow in front, but becoming 
broadened posteriorl}^ Forceps of male large, almost flabelliform, pubescent. Legs long and slender; 
coxae stout, setose on outer edge and on apex; femora about twice as long as the coxse, slightly com- 
pressed, pubescent; tibiae long and slender, longer than the tarsi in the intermediate and posterior legs, 
and covered with two ranges of short and rather slender spines; spurs unequal, long; tarsi with 
small prickles on under surface. Wmgs rather narrow, cuneiform at base, and gracefully rounded at 
apex, surface pubescent. Subcostal vein entirely absent; Rj short, running into the costa about half 
way along the wing; anterior branch of the radial sector running into the costa about two-thirds along 
the wing, posterior branch strongl}-' arcuated, joining the tip of the costa at apex; anterior branch of 
the media a mere rudiment extending a very little distance into the disc of the wing, posterior branch 
commencing in the disc a little beyond the fork of the radial sector; anterior branch of the cubitus not 
quite joining the margin, and disconnected at the base; posterior branch strong and slightly arcuated; 
anal vein rudimentary, represented by a straight line of black hairs (P!. 3, Fig. 22). 
Type species : C. tyideiis, Hutton. 
Geographical distribution of species: 
I. C. tridens, Hutton, Cat. New Zeal. Dipt, etc., p. 12 [P I aty nr a) { iS^i). New Zealand. 
6. SUBFAM. MACROCERIN/E 
Macrocerinas. W'innertz, \'erh. Zool.-Bot. Ges. Wien. Vol. i3, p. 675 (iS63). 
Characters. — This subfamily differs from Ceroplatinti primarily in having extremely long 
antenna, often much longer than the bodv. In the wing venation there is no great difference; R24-3 al- 
wa3's ends in the costa. SCo is present, and the anal vein is more or less sinuous and ends in the margin 
