SCIOPHILA. 69 



Head small, spherical, flattened in front, placed low upon the 

 thorax; eyes oval, slightly emarginate 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 tlie vertex, the 

 middle one only shghtly smaller than the laterals. Palpi incurved, 

 four-jointed, the 1st joint very small, the 2nd and 3rd subequal, 

 the last longer than the others taken together ; antennae pro- 

 jecting forward, arcuated, somewhat compressed, 16-jointed, 

 the two basal joints cupuliform, hairy. Thorax oval, highly 

 arched ; mesonotum long and thickly haired, not setose ; scutel- 

 lum 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. 

 Legs moderately long ; the tarsi of the fore legs double the length 

 or rarely more than double the length of the tibiaj ; the tibiae 

 with spurs and with lateral setae, 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 setae. Wings elongate oval, 

 with rounded base, longer than the abdomen, hairy ; hairs some- 

 times visible to the naked eye. The costa extends considerably 

 beyond the posterior branch of the 3rd longitudinal vein, but does 

 not reach the tip of the wing. The auxiliary vein ends at about 

 the middle of the wing; the 1st longitudinal is long, nearly straight, 

 the 3rd originating from it before the middle of the wing and at 

 a right angle, thence curving gently to the border ; the upper 

 branch of it is very short, nearly upright or moderately oblique 

 and placed more or less parallel with and quite close to the erect 

 basal portion of the vein, so as to enclose a quite small oblong, 

 square or rhomboidal cell. This cell is characteristic of the sub- 

 family and may be known as the sciophiline cell,* and the anterior 

 cross-vein is always at its lower basal corner. The 4th longi- 

 tudinal vein forked near the base, the 5th forked at or beyond the 

 middle ; the posterior cross-vein absent, 6th longitudinal in- 

 distinct and incomplete. 



Fig. 9. — Larva of Sciojyhila. 



Banqe. Including Lasiosoma, Winn., which Johannsen considers 

 synonymous, the present genus occurs in Europe, Australia, 

 North and South America, and the West Indies, but it has not 

 been previously recorded from the East. 



* This is an original suggestion as a name for this cell, wliich does not 

 appear to have been previously named, yet relerenee to it is frequently 

 necessary. It might teclinically be considered the marginal cell but it is never 

 referred to thus. 



