36 
DIPTERA 
6. Genus NECROMYZA, Scudder 
Necromyza. Scudder, Geol. Mag. Vol. 4, p. 2 (121) (iSgS). 
Characters. — A fossil genus from the Miocene. The costa extends to the end of Rj-, the 
subcosta impinges on Rj just beyond the origin of the radial sector, which arises at about two-fifths the 
distance from the base of the wing to the apex ; cell R^+s extends back to the basal cell R itself and the 
cubitus forks far proximad of the R-M crossvein. In the original description of the author it is stated 
that the « brachial crossvein » is at the middle of the wing meaning doubtless vein R24-3 which appears 
to be shown in the author's figure (PI. 6, Fig. 5) though but faintly and indistinctly (compare PI, 3, 
Fig. 28). The hind thighs are stout, longer than the thorax; the hind tibia?, which are twice as stout at 
the apex as at the base, are armed with a pair of stout apical spines half as long as themselves, while 
the hind tarsi are half as long again as the tibiae. 
Type species : A^. pedata, Scudder. 
Geographical distribution of species : 
I. N . pedata, Scudder. Geol. Mag. p. 121 (iSgS). Oeningen, Baden. 
7. Genus SCIOPHILA, Meigen 
Sciophila. Meigen, Syst. Beschr. Vol. i, p. 245 (3o) (1818); Rondani (nee Winnertz), Dipt. Ital. Pro- 
dromus. Vol. i, p. 194 {i856). 
Lasiosoma. Winnertz, Verb. Zool.-bot. Ges. Wien, Vol. i3, p. 748 (i863). 
Characters. — The name Sciophila is used here in the sense of Rondani (i856) and includes 
all the species classified by Winnertz (i863) in his genus Lasiosoma, the latter thus becoming a synonym 
of the former. The species which Winnertz placed in Sciophila are transferred to M y corny a, 'Ronda.m, 
where they rightfully belong. 
Head small, spherical, flattened in front, placed low upon the thorax; eyes oval, slightly emar- 
ginate at the base of the antennae, almost reniform ; ocelli three in number, arranged in a flattened 
triangle upon the broad front or more rarely upon the vertex, the middle one only slightly smaller than 
the laterals ; palpi incurved, four jointed, the first joint very small, the second and third subequal, tha 
last longer than the others taken together ; antenns, projecting forward, arcuated, somewhat compressed, 
2 + 14 jointed, the two basal joints cupuliform. hairy Thorax oval, highly arched; mesonotum long 
and thickly haired, not setose; scutellum very small; halteres with short petiole and elongate knob. 
Abdomen seven segmented, cylindrical, somewhat constricted at the base, hairy, in the male with blunt 
extremity and small forceps' (PI. 7, Fig. 2). Legs moderately long; the tarsi of the fore legs double 
the length or rarety more than double the length of the tibiae. The tibiae with spurs and with lateral 
setje, the fore pair with one or two, the middle pair with three and the hind pair with four rows, the 
inner rows with only few and weak setas. Wings elongate oval, with rounded base, longer than the 
abdomen, hairj^, hairs sometimes visible with the naked eye. The costa produced far beyond the tip of 
but not reaching the tip of the wing ; the subcosta usually extends distad of the small cell and ends 
in the costa; the cell Rj very small and usually rectangular; the media forks at or but very little distad 
of the R-M crossvein; the cubitus forks noticeablj^ distad of the forlv of the media; the anal vein incom- 
plete, ending far from the margin of the wing (PI. 3, Fig. 29). 
These flies are prevalent in Spring and Fall; the larvae live in rotten wood and in fungi. 
