86 
DIPTERA 
margin of tlie wing, and in having the fork of the cubitus nearer the middle of the wing. The costa is 
produced beyond the tip of the radial sector. The genus, erected for fossil species, contains also living 
forms (PI. 5, Fig. 22, 23). 
Type species : P. distincta, Meunier. 
Baltic amber. 
Baltic amber. 
Europe. 
Baltic amber. 
Alaska. 
Finland. 
Sackenia gibbosa may also belong to this genus. 
38. Genus COELOSIA, Winnertz 
Coelosia. Winnertz, Verb. Zool.-bot. Ges. Wien, Vol. i3, p. 796 (24) (i863). 
Boletina, Rondani (nec Staeger), Dipt. Ital. Prodomus, Vol. i, p. 194 (i856). 
Characters. — Head round, flattened in front, placed low upon the thorax; eyes oval, emargi- 
nate at the base of the antennae; ocelli three in number, placed in a triangle upon the broad front; palpi 
incurved, four jointed, the first joint very small, the fourth longest; antennae projecting forward, 
2 -f- 14 jointed, the basal joints differentiated, the flagellar joints cylindrical, somewhat compressed, 
pubescent. Thorax ovate, highly arched, scutellum small, semicircular in outline; metanotum high and 
steep. Abdomen six segmented, in the male slender, cylindrical, somewhat compressed, constricted at 
the base, with large terminal segment and strong forceps (PI. 7, Fig. 7); in the female it is clavate, 
somewhat depressed, constricted at the base, with short ovipositor ending in very short and incon- 
spicuous lamellae. Legs long and slender, the tibiae with spurs and lateral setae; the fore and middle 
tibiae with two rows of seta;, those of the inner row very delicate; hind tibiae with three rows, of which 
the outer rows with stouter, the inner row with delicate setae. Wings elongate oval, with rounded base, 
in the male as long or a little shorter, in the female somewhat longer than the abdomen. The costa 
extends far beyond the tip of the radial sector but not reaching the tip of the wing; subcostal vein ends 
in the costa at or beyond one-third the length of the wing, the vein Sca (subcostal crossvein) wanting; 
media with a short petiole; cubitus forks distad of the fork of the media, its branches widely divergent; 
anal vein incomplete (PI. 5, Fig. 25). 
Type species : C. flava, Staeger. 
Geographical distribution of species : 
1. C. flava, Staeger, in Krojer, Naturh. Tidsskr. Vol. 3, p. 237 (6) {Bole- Europe, and United Stales. 
tina') (1840). 
flava, Winnertz, Verb. Zool.-bot. Ges. Wien, Vol. i3, p. 797 (i) (i863). 
2. C . fldvicauda, Winnertz, ibidem, p. 798 (2) (i863j. Europe, and United States. 
flavicauda, Schiner, Fauna Austr. Dipt Vol. 2, p. 461 (1864). 
3. C. fusca, Bezzi, Bull. Soc. Ent. Ital. Vol. 24, p. 68 (328) (1892). South Europe. 
Geographical distribution of species ; 
1. P. affinis, Meunier (fossil), Mon. Mycetoph. etc. p. 144, pi. 1 1 , f. i3 (1904). 
2. P. ciirvipeiiolata, Meunier (fossil), ibidem, p. 143, pi. 11, f. 14 (1904). 
3. P. dispar, Winnertz, Verb. Zool.-bot. Ges. Wien, Vol. i3, p. 777 (5) 
{Boletina) (i863). 
dispar, Schiner, Fauna Austr. Dipt. Vol. 2, p. 455 (1864). 
4. P. distincta, Meunier (fossil), Mon. Mycetoph. etc. p. 144, pi. 11, 
f. i5, 16 (1904). 
'5. P. inops, Coquillett, Proc. Wa.sh. Acad. Sc.Vol, 2, p. 391 (5o/^/z«a) (1900). 
6. P. Reiiteri, Lundstrom, Acta Soc. Fauna Flora Fenn. Vol. 29, No. i, 
p. 16 {Boletina) (1907). 
