Marshall. — On Nac Zealand Diptera. 301 



Genus Mycetophila, Meig. 



Head somewhat longish, round, compressed in the fore 

 part, situated deep in the thorax ; front broad, the anterior 

 border elongated triangularly, which extends to the basal 

 part of the antennae. Eyes oval. Ocelli two, large. Palpi 

 prominent, incurved, four - jointed ; first joint small, the 

 others equally so, or the last the longest. Antennae pro- 

 jecting forward, arcuated, 2 + 14 jointed ; the joints of the 

 scapus cyathiform, setiferous at the apex ; flagellar joints 

 cylindrical, compressed from the side, with short downy 

 pubescence. Thorax ovate, highly arched, with short pubes- 

 cence, longer hair on the lateral margins, setiferous on the 

 hind border. Scutellum semicircular, or a shortened triangle, 

 setiferous on the border. Metathorax highly arched. Abdomen 

 of the male with six segments, of the female with, seven 

 segments, more or less compressed from the sides, narrowing 

 at the base ; anal joint of the male generally small; ovipositor 

 of the female with two lamellae. Legs robust ; femora com- 

 pressed ; tibiae spurred, the fore pair with small spines on the 

 outer side, the intermediate pair with two ranges of strong 

 spines on the outer side and one range of stronger or weaker 

 ones on the inner side ; the hind tibiae with two or three ranges 

 of short spines on the outer side ; metatarsi of the hind tarsi 

 with fine prickles. Wings a little longer than the abdomen, 

 longish-oval, the base rounded off or more or less obtusely- 

 cuneiformly narrowed, microscopically pubescent. Auxiliary 

 vein incomplete, bent antei'iorly ; costal vein not extending 

 beyond the tip of the second longitudinal vein and not reach- 

 ing the apex of the wing ; marginal cross-vein situated at or 

 somewhat beyond the middle of the first longitudinal vein, 

 and over the base of the second submarginal cell, the latter 

 with a short petiole or sessile ; base of the somewhat-extended 

 posterior cell situated before, under, or a little beyond the 

 base of the second submarginal cell ; the branches of the 

 fourth longitudinal inclined towards one another at their tips ; 

 fifth longitudinal vein incomplete ; rudimentary sixth longi- 

 tudinal vein stout. 



This is a large genus, includmg species that have been 

 described from nearly every known country. 



Mycetojihila sylvatica, n. sp. 



Length of antennae, 0-104; size of body, 0-286 x 0-055; 

 expanse of wing, 0-225 x 0094. 



Joints of scapus yellowish-brown, setose on the upper 

 surface, first joint more than twice as long as the second ; 

 joints of flagellum light-brown ; length four or five times the 

 breadth, covered all over with a close pubescence giving grey 



