84 Tachinidae. 



in the middle, broadened towards each end; it is somewhat raised 

 with a furrow on each side. The whole epistoma, between the arms 

 of the frontal suture, is broad, confluent with the intermediate 

 triangles on the sides; above is placed the antennal fovea, divided 

 in the middle by a small rudimentary carina. No vibrissæ. Eyes bare, 

 relatively small. Mouth parts rudimentary, but a pair of small glo- 

 bular palpi present. Antennæ inserted at the lower end of the eye, 

 small, only stretching slightly out of the fovea, third joint somewhat 

 globular; arista bare, thickened at base. Thorax quadratic. No 

 bristles, also no sternopleural bristles. Hypopleura with a row of 

 yellow, a little bristly hairs. Abdomen a little elongate, somewhat 

 ovate, without bristles. Fifth sternite a little roundish excised in 

 hind margin. Legs somewhat slender; hind femora thickened at base, 

 with a swelling above. Legs without bristles; femora with long hairs 

 below and tibiæ on posterior side. Claws and pulvilli equal in both 

 sexes. Wings with first posterior cell petiolate; angle on discai vein 

 obtuse; posterior cross-vein placed near the angle, together with 

 apical cross-vein parallel with the margin; anal vein not reaching 

 margin; cubital vein with bristles at base; costa with quite short, 

 not dense spinules. Wing-membrane strongly corrugate. Thoracai 

 squamula large, not fringed. 



The fullgrown larva is of elongated oval shape, arched above, 

 flat below; the dorsal surface almost bare, the ventral with trans- 

 verse girdles of small spinules in several rows in each girdle. There 

 are two strong mouth hooks. The species is parasitic on sheep and 

 also recorded on goats. The eggs are said to be deposited at the 

 nostrils of the host, but under certain conditions the species is vivi- 

 parous; Portschinsky (see Rev. of Appl. Entom. I, 134) is, however, 

 of opinion that the species is normally viviparous. The larva lives 

 in the nasal and frontal cavities and gives rise to the so-called false 

 gid; when mature the larvæ quit the host through the nostrils and 

 pupate in the ground. The eggs are deposited in July and August, 

 the larvæ hibernate and are fullgrown in early summer next year. 

 The larvæ have sometimes been found on man, in the ears, nose and 

 mouth, but they do not reach to develop here. 



Of the genus only one European species is known, also occurring 

 in Denmark. 



