Demoticus. 527 



sexes, rather protruding; cheeks broad, and jowls nearly half the 

 height of the eye. In both sexes ocellar, inner and outer vertical and 

 two orbital bristles. Distinct postocellar and occipital bristles. Behind 

 postocular bristles rows of black hairs. Frontal bristles reaching 

 to end of second antennal joint, outwards to the uppermost a reclinate 

 bristle in both sexes. Cheeks bare. Vibrissæ quite slightly ascending. 

 Eyes bare. Epistoma a little retreating, slightly reflected below. Pro- 

 boscis of medium length, somewhat slender. Palpi thread-like, in female 

 somewhat dilated outwards. Antennæ inserted high above middle 

 of the eye, third joint four times as long as second, in male dilated 

 outwards, in female shorter; arista apparently bare, second joint 

 elongated. Thorax rectangular; three postsutural dorsocentrals and 

 two præ- and two postsutural acrostichals; no præsutural intraalar 

 bristle; one posthumeral bristle. Scutellum with two marginal bristles 

 on each side and small, crossing apical hairs. Three sternopleural 

 bristles. Pteropleura above with small hairs and a small bristle. 

 Abdomen elongated, cylindrical, somewhat tapering; excavation on 

 second segment reaching hind margin. There are discai and marginal 

 bristles, second segment wdthout bristles; fifth with bristles all over. 

 Genitalia small, hidden. Legs somewhat long; claws and pulvilli 

 not elongated. Wings with first posterior cell narrowly open, ending 

 a little before apex of wing; discai angle obtuse; a costal spine present. 

 Of the genus five European species are recorded, one occurring 

 in Denmark, the other more southern. 



1. D. plebejus Fall. 



1810. Fall. Vet. Acad. Handl. XXXI, 273 et 1820. Dipt. Suec. Muse. 13, 22 

 {Tachina). — 1824:. Meig. Syst. Beschr. IV,343, 180 et 1838. VII, 191, 71 {Tachina). 



— 1844. Zett. Dipt. Scand. III, 1034, 24 (Tachina). — 1862. Schin. F. A. I, 

 433. — 1889. B. B. Denkschr. Akad. Wiss. Wien, LVI, 134, Tab. X, Fig. 249. 



— 1896. Pand. Rev. Entom. XV, 67, 2 {Aphria). — 1907. Kat. palåarkt. Dipt. 

 III, 414. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 164. — T. spectabilis Meig. 

 1824. 1. c. IV, 311, 124 et 1838. VII, 190, 9. — 1900. Stein, Ent. Nachricht. 

 XXVI, 149. 



Male. Frons much broader than the eye. Head silvery pruinose, 

 orbits more grey above; frontal stripe red. Orbits slightly hairy, 

 and jowls with quite small black hairs. Occiput pale-haired, with 

 black hairs behind postocular bristles. Antennæ black, third joint 

 large and dilated apically; arista thickened to somewhat near end. 

 Palpi yellow. Thorax bluish grey pruinose, with four not very con- 

 spicuous darker grey stripes, the median very narrow, abbreviated 



