FAM. MYCETOPHILID.E 
99 
the first three taken together; eyes oval, emarginate at the base of the antennae; ocelli three in number, 
placed in a transverse line, the middle one small; antennae arcuate, 2 -f" 14 jointed, the two basal joints 
differentiated, the flagellar joints cylindrical. Thorax short, highly arched; metanotum short; scutellum 
small, with long setae. Halteres with round knob. Abdomen short, compressed, in the male six seg- 
mented; in the female seven segmented. Legs strong, the middle and hind tibiae with two ranges of late- 
ral setae each. Wings oval, those of the male broader at the base. Costa prolonged far beyond the tip of the 
radial sector; subcostal vein short, but slightly curved; fork of the media distad of the basal section 
of the radial sector ; forked portion of the cubitus very small, the fork far distad of the fork of the media, 
the branches widely divergent; one anal vein long and strong though not reaching the posterior margin 
of the wing (PI. 6, Fig. 12). 
The prolonged costa and the strong anal vein readily separate this genus from Plironia. 
Type species ; ill. Kowarsti, Dziedzicki. 
Geographical distribution of species : 
I. M. Kowarzii, Dziedzicki, Horae Soc. Ent. Ross. Vol. 23, p. 52 1, pi. 21, Europe. 
f. 2l3-220 (1889). 
53. Genus CORDYLA, Meigen 
Cordyla. Meigen, Illiger's Mag. Vol. 2, p. 262 (i8o3); Klass. Vol. i, p. 98 (1804). 
Polyxena. Meigen, Nouv. Class. Mouches a deux ailes, p. i5 (1800) (without type). 
Pachypalpus. Macquart, Suites a Buffon, Vol. i, p. 144 (1834). 
? Brevlcornu. Marshall, Trans. New Zeal. Instit. Vol. 28(1895), p. 3o6 (1896). 
? Piotepalpus. Rondani, Dipt. Ital. Prodromus, Vol. i, p. 196 (12) (iS56). 
Characters. — Head oval, flattened in front, placed low upon the thorax; front broad, the 
anterior margin produced into a triangle which descends to the base of the antennae; eyes oval; ocelli 
small, two in number, contiguous to the eye margin; antennae projecting forward, 2 -\- 10, 2-\- 12, or 
2 -j- 14 jointed, very short, but little longer than the head, the joints shorter than broad, disc-like 
(Pi. I , Fig. 7), usually closel}' sessile, pubescent; palpi four jointed, the basal joint very small, the 
second much enlarged, thickened, compressed, third and fourth slender, almost filiform, placed at an 
angle with the second, pubescent (PI. I, Fig. 9). Thorax oval, highly arched, sometimes produced 
over the head; mesonotum with short and depressed hairs, posteriorly with few weak setae; scutellum 
large, setose on the margin; metanotum somewhat arched. Abdomen compressed, constricted at the 
base, seven segmented, the seventh usually very small and retracted, in the male with small but complex 
forceps (PI. 7, Fig. 20), the ovipositor of the female short, stout, with two small lamellae. Legs 
slender, the tarsi long, the femora compressed, the tibiae spurred, the fore and middle pairs rarely with 
lateral setae, the hind pair with two ranges of very delicate ones on the extensor surface ; the plantae 
of the hind tarsi ciliate with microscopic setulas. Wings as long or shorter than the abdomen, oval, with 
rounded base, with microscopic setulae arranged in regular longitudinal rows. Costa does not extend 
beyond the tip of the radial sector and ends some distance from the tip of the wing ; subcosta very 
short, curved toward Ri ; media forks distad of the basal section of the radial sector, its posterior branch 
sometimes not reaching the wing margin; cubitus forks either proximad or distad of the fork of the 
media; anal veins incomplete (PI. 6, Fig. 13). The larvae live in rotten wood and in fungi. The 
adult insects may be taken at all times except in winter in woods and shrubbery. 
The description of Brevkoniu given by Marshall agrees perfectly as far as it goes with Cordyla, but 
no rriention is made of the stout second palpal joint, though it appears to be indistinctly shown in that 
author's figure. 
