I9I3-] M. Bezzi : Indian Trypaneids {Fruit-Flies). 59 



cave, or with a very characteristic deep median bend {Ceyatitis-\{k&) ; sometimes with 

 the lower portion very prolonged. 



15. Costal cell: at the base of fore border between costa and auxiliary vein, 

 broad or narrow, short or long ; in reality this cell is divided into two cells by the 

 humeral cross- vein; these cells are called the first and the second costal cell; but is 

 here always considered only the second. 



16. Subcostal cell, or mediastinal cell : at fore border below the preceding 

 between auxiliary and first longitudinal vein ; less important, often very small and 

 sometimes indistinct. 



17. Stigma or pterostigma : the callosity at the end of the subcostal cell, where 

 it is dilated'; important in its form and colouration ; short or long, often very much 

 prolonged. At the base, where the auxiliary vein ends, it bears the so-called co'ital 

 bristle. 



18. Marginal cell, or sub:ostal cell of Schiner: in the distal portion o- the 

 fore border, between first and second longitudinal veins, narrow or broad, more or 

 less elongated in the apical portion. 



ig. Submarginal cell^ or cubital cell : below the preceding and between the 

 second and third longitudinal veins, from the base to the tip of the wing ; narrow or 

 broad, more or less widened at the end. 



20. First basal cell: in the middle, between the third and fourth longitudinal 

 veins, from the base of the wing to the small cross-vein ; more or less long ; widened 

 or not at the end. 



21. First posterior cell: in continuation of the preceding, between the same 

 veins, from the small cros5-vein to the hind margin of the wing ; with parallel sides 

 or widened outwards, very rarely narrowed at the end. 



22. Second basal cell : below the base of the first basal cell, between the fourth 

 and fifth longitudinal veins from the bifurcation of these veins to the basal cross- 

 vein; more or less broad, more or less widened at end, sometimes very much 

 dilated. 



23. Discoidal cell, or discal cell: in continuation of the preceding and between 

 the same veins, from the basal to the hind cross-vein ; more or less long and more 

 or less widened at the end, very rarely narrowed at the end 



24. Second posterior cell : in continuation of the preceding and between the 

 same veins, from the hind cross-vein to the hind margin of the wing ; more or less 

 widened. 



25. Anal cell, or third basal cell : below the second basal cell, between the .Ifth 

 and sixth longitudinal veins, from their bifurcation to the anal cross vein ; r irely 

 obtuse at the end, usually with the inferior angle drawn out in a point which is 

 narrow or broad. This cell is shorter than the second basal cell, or of equal length, 

 or longer, and is sometimes very elongate, reaching almost to the hind margin of 

 the wing. 



26 Third posterior cell : in continuation of the preceding and between the same 

 veins, from the anal cross-vein to the hind margin of the wing. 



