Pelatachina. 515 



outer vertical bristles, the verticals stronger in female than in male, 

 and in female two orbitals. Postocellar and occipital bristles. Occiput 

 all black-haired behind postocular bristles. Frontal bristles reaching 

 just below insertion of antennæ, all crossing in male, in female an 

 outwards directed bristle outwards to tlie iippermost frontal bristle. 

 Cheeks bare. Vibrissæ only a little ascending, but generally fme 

 hairs present, continuing upwards above middle. Eyes bare. Epi- 

 stoma ratlier low, slightly retreating. Antennæ inserted just below 

 middle of the eye, third joint not one and a half times as long as second; 

 arista with second joint short. Thorax rectangular; three postsutural 

 dorsocentrals and one præsutural and one or two postsutural acrosti- 

 chals; no præsutural intraalar bristle. Scutellum with three marginal 

 bristles on each side, the middle pair strong, diverging; no apical 

 but a pair of discai bristles. Three sternopleural bristles. Pteropleura 

 with a bundle of hairs above, among which one bristle. Abdomen 

 elongated conical; excavation on second segment not reaching hind 

 margin; there are discai and marginal bristles, second segment with 

 a pair of marginal, fifth with bristles all over. Legs with somewhat 

 strong bristles; claws and pulvilli elongated in male; front tarsi in 

 female simple. Wings with first posterior cell narrowly open or just 

 closed, ending very near apex of wing; discai angle obtuse, more or 

 less rounded; cubital vein with only one bristle at base; subcostal 

 vein generally with more or fewer bristles on apical part; a small 

 costal spine. 



The sole species is parasitic on Rhopalocera^ especially Vanessa, 

 and Heterocera, and is also recorded from Saperda; it belongs to 

 PantePs group 6 and forms a secondary breathing hole; it hibernates 

 as pupa in the ground. 



Of the genus only one species is known, also occurring in Denmark. 



1. P. tibialis Fall. 



1810. Fall. Vet. Akad. Handl. XXXI, 276 et 1820. Dipt. Suec. Muse. 

 13, 23 {Tachina). — 1824. Meig. Syst. Beschr. IV, 278, 67 et 1838. VII, 191, 47 

 (Tachina). — 1838. Zett. Ins. Lapp. 637, 14 et 1844. Dipt. Scand. III, 1057, 

 51 {Tachina). — 1862. Schin. F. A. I, 477 {Tachina). — 1889. B. B. Denkschr. 

 Akad. Wiss. Wien, LVI, 138, Tab. VIII, Fig. 214 et 1893. LX, 192, {Hyria). 

 — 1896. Pand. Rev. Entom. XV, 95 {Trixa). — 1907. Kat. palåarkt. Dipt. III, 

 401. — 1921. Baer, Zeitschr. f. angew. Ent. VII, 374. — 1924. Stein, Arch. f. 

 Naturgesch. 90, 6, 162. — T. aestiva Meig. 1824. 1. c. IV, 278, 68. — T. aesti- 

 valis Macq. 1835. Suit. å Buff. II, 145, 24. — 1900. Stein, Ent. Nachricht. 

 XXVI, 130 {Hyria). — Peteina inconipleta Pand. 1896. 1. c. XV, 102, 5. — 

 1907. Villen. Ann. Soc. Ent. de Fr. LXXVI, 390. 



33* 



