448 Tachinidae. 



middle. Antennal arista with second joint short. Thorax and abdomen 

 with the pruinosity whitish, and on abdomen forming distinct front 

 bands; fourth abdominal segment with only six marginal bristles. 

 Middle tibiæ with only one anterodorsal bristle; claws and pulvilli 

 quite small. Wings very slightly or somewhat more brownish tinged, 

 but not yellow at base; posterior cross-vein about in the middle 

 between medial cross-vein and angle. Squamulæ whitish or a little 

 yellowish. Halteres yellow. 



Female. Similar; frons a little broader; front tarsi with the 

 four last joints quite slightly or scarcely dilated. 



Length 5 — 7 mm. 



T. decorata is rare in Denmark, only four specimens, two males 

 and two females, are known; one male bred from a pupa found in 

 a hollow tree in Charlottenlund (Schlick), the other specimens from 

 Ordrup (Stæger). As the species is known as bred from Tipula irrorata 

 (Stein), the above mentioned pupa has possibly come from a Tipulid 

 in the hollow tree, 



Geographical distribution: — The species is known from Den- 

 mark and Southern Sweden, Holland, Germany, and, according to a 

 communication from Dr. Villeneuve, also from the Pyrenees. 



Remarks: I have examined Zetterstedt's type, a female, which 

 is in our collection. 



107. Digonocliaeta Rond. 



{Bigonicheta.) 



Species of medium or smallish size and blackish colour, more or 

 less to quite grey pruinose. Head a little broader than thorax, some- 

 what convex behind and puffed out below, higher than long. Frons 

 very broad and equal in both sexes, somewhat protruding, Jowls 

 from half as broad to nearly as broad as the eye is high. In both 

 sexes ocellar, inner and outer vertical and two orbital bristles. Post- 

 ocellar and occipital bristles relatively strong. Occiput with black 

 hairs behind postocular bristles. Frontal bristles descending at most 

 about to the end of second antennal joint, the uppermost directed 

 outwards in both sexes. Cheeks with a single row of hairs or with 

 hairs more numerous. Vibrissæ not ascending. Oral bristles few in 

 number. Eyes bare, at most with very imperceptible and sparse 

 hair<5. Epistoma somewhat retreating, slightly or almost not reflected 

 below. Antennæ in&erted well or high above middle of the eye, third 



