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9. A New Species of Tachiuo-Oestrid front South Africa, (Diptera). 



-By Dr. J. VILLENEUVE. 



(With three text -figures.) 



EONDANIOOESTEUS n. geii. 



This genus ( (?) is distinguished by the following characters. 



I. Head. Three remote ocelli. Eyes with a short, scattered pube- 

 scence, separated on the vertex by hardly a third of the diameter of the 

 eye, but not bulging forward on each side of the antennae, so that the 

 cordiform cavity of the latter is somewhat shallow ; the head is divided 

 by a medio-vertical blunt and little bulging ridge which disappears on 

 the facial groove. The latter is long, little narrowed, bound on each 

 side by a border bearing towards the upper part a large vibrissa, and 

 below four or five spaced supplementary ones (fig. 1). The profile is 

 almost semicircular ; the eyes are elongate, nearly vertical, and the 

 peristome is narrower than one-fourth of the height of the eye. The 

 antennae are inserted very little below the median part of the eye, and 

 are wholly showing ; they are short, with the 3rd joint rounded at 

 tip and about equal in length with the third. The 2nd joint of the 

 anteuual cheta is elongate, the 3rd is rigid and thickened at base. 

 The epistome is reclining, and the frons bulges a little. The buccal 

 opening is small, with a short proboscis, palps still shorter (fig. 2). 



II. Chaetotaxy. Setae numerous, long on the thorax and on the 

 outer face of the tibiae, erect and short on the abdomen. Thorax : 

 Acrostical setae complete, three pairs in front of the suture and three 

 pairs behind ; dorsoceutral setae 2 or 3 + 3 ; humeral 3 ; posthumeral 

 2, the second set slightly above the presutural seta ; iutraalar 2, one 

 immediately behind the suture, the other in front of the postalar callus ; 

 no intraalar seta in front of the suture. Abdomen : Median excavation 

 of first segment leaving behind a moderately broad fold carrying a 

 median pair of marginal setae, the other segments with a pair or two 

 of irregularly set discal setae, and a pair of median marginal. The 

 marginal setae are set a little in front of the hind border on every 

 segment. Head : One pair of long, vertical, crossed, inner setae ; the 

 fi'outal setae stop in front towards the base of the second autennal 

 joint ; no ocellary setae. 



