Loewia. 419 



from one third (male) to aboiit half as broad as the eye is high (female). 

 In both sexes ocellar and inner vertical, in female also outer vertical 

 and two to three orbital bristles. Postocellar and occipital bristles 

 present. Behind postocular bristles occiput mainly witli black hairs. 

 Frontal bristles descending about to end of second antennal joint, in 

 male all crossing, in female an outwards directed bristle above. Cheeks 

 with few and small or with numerous strong hairs. Vibrissæ not 

 ascending. Eyes in male short-hairy, in female sparingly hairy or 

 only pubescent. Epistoma almost not retreating, low, broad down- 

 wards, but the vibrissal ridges converging below and here narrowing 

 epistoma. Oral bristles well developed, anteriorly, near the large 

 vibrissa, numerons and in more than one row. Proboscis short. Palpi 

 small. Antennæ inserted below middle of the eye, in female m.uch 

 below middle; they are short, third joint not or only slightly longer 

 than second. Thorax about quadratic; three postsutural dorsocentrals, 

 and two præ- and three postsutural acrostichals; one posthumeral 

 bristle; a præsutural intraalar bristle. Scutellum with four marginal 

 bristles on each side, the apical crossing. Two sternopleural bristles. 

 Pteropleura with a bundle of hairs and a bristle above. Abdomen 

 ovate; excavation on second segment reaching quite near the hind 

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

 out bristles; fifth with bristles on whole apical part. Legs short and 

 robust ; claws and pulvilli in male elongated. Wings with first posterior 

 cell shorter or longer petiolate, ending a little before apex of wing, 

 discai angle obtuse or nearly rectangular; a moderate costal spine. 



L. foeda has been bred from a Lithobiiis (Thompson: Compt. 

 rend. des séanc. Soc. de Biol. LXXVIII, 1915, 413; this author thinks 

 it probably idential with Discochaeta lithohii Giard,). 



Of the genus about 7 European species are recorded; two occur 

 in Denmark. 



Table of Species. 



1 . Species not below 6 mm ; first posterior cell with a short 



peduncle; cheeks with few and small hairs 1. foeda. 



— Species about 4,5 mm ; first posterior cell with a longer pe- 

 duncle; cheeks with numerous strong and bristly hairs. ... 2. petiolata. 



1. L. foeda Meig. 



1824. Meig. Syst. Beschr. IV, 282, 74 {Tachina) et 1838. VII, 208, 3 

 {Clista). — 1900. Stein, Ent. Nachricht. XXVI, 137 {Clista). — 1900. Villen. 

 Bull. Soc. Ent. de Fr. 382, 6 et 1906. Wien. Ent. Zeitg. XXV 248 et 1907. ibid. 



27* 



