go 
DIPTERA 
Characters, — Ocelli three in number, placed in a horizontal line on the front; antennae 2-I-14 
jointed. Abdomen seven segmented. Wings broad, base rounded; costa prolonged far beyond the tip of 
the radical sector, but not quite reaching the tip of the wing; subcostal vein short and ending in the 
vein R I ; Ri ends in the costa beyond the mid-length of the wing ; basal section of the radial sector nearly 
transverse in position, situated at about the middle of the wing; media forks distad of the base of the 
radial sector; cubitus forks distad of the proximal end of the R-M crossvein which is nearly longitudinal 
in position and lies in the same line with the last section of the radial sector ; anal veins very short, rudi- 
mentary (PI. 6, Fig. 1). 
While slight differences exist in the wing venation of Sciarella. Meunier (PI. 6, Fig. 2), and 
Heeriella, Meunier (PI. 6, Fig. 3), both fossil forms, they are hardly sufficient to warrant considering 
them as distinct from Parastemma. In Sciarella the base of the petiole of the media (i. e. the second section 
of the media) is nearer the base of the wing, thus the R-M crossvein is longer, while in Heeriella the 
subcostal vein appears to be longer, and the humeral crossvein and the vein Sc^ are equidistant from the 
base of the wing. 
Type species ; P. ainhigiium, Grzegorzek. 
Geographical distribution of species : 
1. P. ambiguiim, Grzegorzek, Berl. Ent. Zeitschr. Vol. 29, p. 199, pi. 9 A, Europe. 
f. a, b, c(i885). 
2. P. bifurcata, Meunier (fossil), Mon. Mj^cetoph. etc. p. 76 (i), pi. 7, f. 4, Baltic amber. 
5 {Heeriella) (1904). 
3. P. brevicorne, Zetterstedt, Dipt. Scand. Vol. 11, p. 4147 (6) (Leia) (i852). Europe. 
brevicorne, Walker. Ins. Brit. Dipt. Vol. 3, p. 342, pi. 21, f. 6 (Lf/'a) (i856). 
helvolum. Walker, ibidem, p. 3i (i3) {Leia) (i856). 
— P. helvoliim, \N aXkev = brevicorne, Zetterstedt. 
4. P. mycetol>hiliformis, Meunier (fossil), Mon. Mycetoph. etc. p. 78 (4), Baltic amber. 
pi. 7, f. i5 {Sciarella) (1904). 
45. Genus ANATELLA, Winnertz 
Anatella. Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 854 (33) (i863). 
Characters. — Head round, flattened in front, placed low upon the thorax, anterior margin of 
the front bordering the base of the antenna;; eyes round; ocelli small, the middle one smaller than the 
laterals, the latter contiguous to the eye margin; palpi incurved, four jointed, the first joint small, the 
fourth longest; antennae slender, arcuate, 2+14 jointed, the basal joints differentiated, both with setae 
at the apex, the flagellar joints cylindrical, somewhat compressed, pubescent. Thorax small, oval, 
highly arched; mesonotum setose on the margin; scutellum subtriangular ; metanotum arched. Abdomen 
slender, compressed, constricted at the base, clavate, six segmented in the male, last segment and the 
forceps variable in size, in the female seven segmented, with short ovipositor and a pair of terminal 
lamellte. Legs long, tarsi long; hind femora compressed, all tibiae with spurs and lateral setae, the spurs 
unequal. Wings as long or longer than the abdomen, elongate oval, anal lobe small, microscopic 
setulose. Costa produced far beyond the tip of the radial sector, and nearly reaching the tip of the 
wing; subcostal vein very short, ending in Ri; petiole of the media short; fork of the cubitus may be 
proximad, under or distad of the fork of the media; anal vein stout but incomplete (PI. 6, Fig. 4). 
The flies of this genus are very small. They may be found in shady, sheltered spots in the woods. 
Type species : A. gibba, Winnertz. 
