INSECTA. 323 



Phasia LATE. Antennae short, the third joint a little longer 

 than the second. Abdomen depressed, downy, quinqueannulate. 

 Wings divaricate, broad, often coloured, thickish. 



Fig. SCHELLENB. Tab. n. fig. i ; GUE*R. Iconogr. Ins. PI. 102, fig. 4. 

 Sub-genera : Hyalomyia, Alophora, Elomyia ROBIN. 

 Tmchopoda LATH. 



Xysta MEIG. Antennae short, two last joints sub-equal. Abdo- 

 men convex, oval with five rings or six, pubescent or sub-nude. 

 Wings lanceolate, divaricate. 



Gymnosoma MEIG. Antennae moderate, with two last joints 

 sub-equal. Abdomen quadriannulate, globose, sub-nude. 



Sub-genera : Cistogaster LATR., Strongygaster MACQ. 



Ocyptera LATR. Antennae moderate, with third joint longer 

 than second, linear, compressed. Abdomen elongate, subsetose, 

 quadriannulate. 



Phania MEIG. Antennae moderate, third joint elongate, linear, 

 compressed. Abdomen oval, subsetose, quadriannulate, inflexed 

 towards the extremity. 



Lophosia MEIG. Antennae moderate, third joint the largest, 

 compressed, obtrigonal. Abdomen cylindrical, quadriannulate, 

 subsetose. 



Curtocera MACQ. 



Tachina MEIG., Echinomyia DUMER. Antennae moderate or 

 short, with second joint often long, sometimes exceeding the third ; 

 triarticulate seta at the base of the third joint. Abdomen conical 

 or oval, quadriannulate, setose. 



A numerous genus, which beyond any other gives us an idea of the 

 inexhaustible riches of nature in the forms and modifications of animal 

 organisation. MEIGEN counts more than three hundred species which are 

 found in Europe, and of the foreign species, yet known so fragmentarily, 

 still more than a hundred have been described. In some, as for instance in 

 Tachina grossa, the second joint of the antennae is much larger than the 

 last (see DE GEER Ins. vi. PI. I. fig. 2) ; to such species LATREILLE 

 applies exclusively the name of Echinomyia, to which accordingly Tachina, 

 larvarum does not belong, and which only answers to a small part of the 

 Tachina; of MEIGEN. 



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