ORTALID.E — SYSTEMATIC DISTRIBUTION. 41 



The genus Duomyia, of Walker, is probably closely allied to 

 the above named two genera. Its definition is too insufficient 

 to enable us to form a trustworthy opinion. The irregularly 

 formed name cannot possibly be preserved. 



Two species closely related to each other, belonging to the 

 section Platystomina, Macquart (in the Dipt. Exotiques) has de- 

 scribed as Tephritis caerulea, and strigipennis. With several 

 other Australian species, very similar to them, they can be united 

 in a genus which may be called Celetor. The very striking 

 characters of this genus are the following: The structure of the 

 body is Trypcta-Wke, with the exception, however, of the head. 

 Front of an equal breadth, very steep and long, so that the an- 

 tenna? are situated much deeper than in any other genus of the 

 present group ; the front is evenly and rather densely pilose ; 

 the bristles of the vertex and the lateral bristles, closely approxi- 

 mated to them are rather stout ; the ocelli are near the edge of 

 the vertex and closely approximated to each other ; the two 

 bristles, which otherwise are near them, are wanting here. An- 

 tenna? short, hardly reaching beyond the middle of the face ; 

 their third joint of equal breadth, with an acute anterior angle ; 

 antennal arista slender, bare. Middle portion of the face con- 

 cave ; clypeus rather broad, projecting ; proboscis stout ; palpi 

 rather broad towards their end. Eyes very high and narrow ; 

 cheeks broad ; the lower part of the occiput strongly turgid. 

 Thorax strongly developed, rather of an equal breadth ; scutel- 

 lum turgid, overhanging the perpendicular metathorax, with six 

 bristles. Abdomen with four segments in both sexes, as in the 

 preceding genera ; the last segment of the female abdomen 

 generally of a softer consistency. The first joint of the oviposi- 

 tor flattened, always entirely protruding, suddenly attenuated 

 near the basis, more gradually towards the tip, thus having 

 an almost oval outline. Wings rather large, broad towards the 

 basis; the auxiliary vein lies very near the first longitudinal, its 

 end, however, diverges from it at an obtuse angle towards the 

 costa, and preserves its distinctness aud stoutness to the very 

 tip. Otherwise, the venation is not unlike that of Platystoma, 

 Lamprorjaster, etc., only the small crossvein is beyond the last 

 third of the discal cell, a position somewhat reminding of Valonia 

 Walk. The coloring of the body is blackish-blue, seldom verging 

 on greenish ; the front red or reddish-brown ; the lateral borders 



