180 Tachinidae. 



Male. Frons less than half as broad as the eye. Orbits and face 

 whitish or greyish silvery, dark reflecting; jowls grey; frontal stripe 

 black. No or slightly individualised outer vertical bristles. Bristles 

 on cheeks somewhat long but fine. Jowls black-haired. Occiput grey, 

 nearly all black-haired, only a little pale-haired below in the middle. 

 Antennæ with third joint not twice as long as second, reaching the 

 lower end of the eye. Palpi black. Thorax bluish grey pruinose, the 

 black stripes rather broad and eqiially broad; three postsutural 

 dorsocentrals; a pair of præscutellar and some præsutiiral acrosti- 

 chals. A præsutural intraalar bristle. Scutellum with crossing apical 

 bristles. Abdomen bluish grey pruinose, the black tessellations to 

 some degree forming three longitudinal stripes; third segment with 



marginal bristles. Hairs on thorax and ab- 

 domen somewhat long and fme. All ster- 

 nites with erect hairs. Fifth sternite without 

 brush, with only marginal hairs. Genitalia 

 small; præhypopygial segment black, some- 

 what greyish pruinose, wdthout marginal 

 bristles, only the marginal hairs slightly 

 longer. Hypopygium black, with somewhat 

 strong hairs; upper forceps cleft only at 

 apex, straight or nearly, in profile with 

 about parallel margins and not attenuated; 

 Fig. 45. S. clathrata. on ventral side it is incised just before apex, 



so that a pointed apical tooth is formed ; 

 anterior claspers longer than posterior, not much curved, the posterior 

 pointed and hook-like curved at apex. Penis with the end part oval 

 and somewhat knob-like, bent ventrally a little above the end; a 

 small ventral lobe is seen, distinctly separated from the end part. 

 Posterior femora sparingly fringed below; hind tibiæ rather or very 

 sparingly fringed on antero- and posteroventral sides, most on the 

 latter side; large specimens may have the tibiæ a little more fringed, 

 and also middle tibiæ may be a little fringed distally; middle femora 

 with comb and some longer bristles inwards; hind femora with an 

 anteroventral row of distant and fine bristles. Wings somewhat 

 tinged, most towards base; costal segment 3 and 5 about equal; 

 subcostal vein bare or with some bristles; no or a small costal spine. 

 Female. Frons not quite as broad as the eye. Genital split not 

 visible from above, with long, crossing bristles. 

 Length 6 — 8 mm (after Bottcher to 11 mm). 



