538 Tachinidae. 



and two orbital bristles. Distinct postocellar and occipital bristles. 

 Occiput all over with rows of black hairs. Frontal bristles reaching 

 only to insertion of antennæ, above an outwards directed bristle 

 in both sexes. On cheeks a row of downwards directed bristles to 

 near lower end of the eye, and cheeks besides hairy. Vibrissæ not 

 ascending. Eyes bare. Antennæ inserted high above middle of the 

 eye, third joint somewhat longer than the somewhat elongated second; 

 arista with second joint a little elongated. Oral cone and proboscis 

 of medium length, proboscis somewhat slender. Thorax rectangular; 

 three postsutural dorsocentrals, no acrostichals ; no præsutural 

 intraalar bristle and two postsutural; one posthumeral bristle. Three 

 sternopleural bristles. Pteropleura with a little bunch of hairs above. 

 Scutellum with three marginal bristles on each side, the apical crossing, 

 the lateral very long. Abdomen rather elongated, cylindrical and slen- 

 der, almost not attenuated behind; second segment fully as long as 

 third, excavation small, only present at base; there are only mar- 

 ginal bristles, a row on second segment. Legs strongly bristled; 

 anterodorsal bristles on hind tibiæ unequal, and mainly strong; 

 middle tibiæ with more than one ventral bristle; claws and pulvilli 

 in male slightly elongated. Wings with first posterior cell narrowly 

 open or just closed, ending somewhat before apex of wing; discai 

 angle about rectangular; subcostal vein with few bristles; cubital 

 vein with bristles beyond medial cross-vein; a long costal spine. 



The species are parasitic on Heterocera, erinaceus is also bred 

 from a Trypetid. 



Two palæarctic species are known, one of them only known 

 from Greenland. 



1. P. erinaceus Fabr. 



1796. Fabr. Ent. Syst. IV, 328, 68 {Musca) et 1805. Syst. Antl. 311, 10 

 (Tachina). — 1810. Fall. Vet. Acad. Handl. XXXI, 275 et 1820. Dipt. Suec. 

 Muse. 15, 28 {Tachina). — 1824. Meig. Syst. Beschr. IV, 345, 183 [Tachina) 

 et 1838. VII, 214, 1, Tab. LXIX, Fig. 56—60. — 1844. Zett. Dipt. Scand. III, 

 1078, 75 [Tachina). — 1862. Schin. F. A. I, 439. — 1889. B. B. Denkschr. 

 Akad. Wiss. Wien, LVI, 138, Tab. X, Fig. 270 et 1891. LVIII, 387. — 1896, 

 Pand. Rev. Entom. XV, 100, 2. — 1907. Kat. palåarkt. Dipt. III, 376. — 1921. 

 Baer, Zeitschr. f. angew. Ent. VII, 367. — 1924. Stein, Arch. f. Naturgesch. 

 90, 6, 148. 



Male. Frons above considerably broader than the eye; cheeks 

 somewhat narrowing downwards. Orbits, jowls and cheeks bluish 

 grey, in certain views somewhat silvery; frontal stripe velvet black. 



