14-1 



»i 



18 



328 NORTH AMERICAN TRYPETINA. 



i Scutellum tumid, bituberculate. IX. Peronyma. 



12 < Scutellum of the ordinary structure, not swollen, although convex. 



* X. Plagiotoma. 



/ Crossveins conspicuously approximate, scutellum unusually swollen. 



13 \ XII. Oedaspis. 

 (. Crossveins not approximate, scutellum not swollen. 14 

 \ Scutellum yellow, with four bristles, wings with black crossbands. 



XIII. Rhagoletis. 

 Scutellum black, with two bristles, wings black, with hyaline inden- 

 tations along the margin. XIV. Aciura. 

 / Fifth vein strongly bristly ; scutellum with six bristles. 

 15 J XV. Blepharonedra. 

 I Fifth vein not bristly; scutellum with six or two bristles. 16 

 , fi ( Wings banded on the apex. XVI. Acrotenia. 

 I Wings not banded on the apex. 17 

 Face spotted. 18 

 Face not spotted. 19 

 f Wings very much dilated ; pattern of the picture not radiating. 



XVII. Edtreta. 

 Wings not dilated; the pattern of the picture radiating along the 

 margin (Tab. XI, f. 3). XVIII. Carphotricha. 



,„( Front remarkably broad. 20 



( Front narrow, or of medium breadth. 21 



f Third antennal joint short, rounded at the tip, ovipositor conical. 

 XIX. Eurosta. 

 . Third antennal joint remarkably long, with a very sharp anterior 

 i angle, ovipositor flattened. XX. Acidogona. 



f Wings without picture, or on the apical half only, with a reticulation 

 dissolved in crossbands. XXI. Aspilota. 



Wings neither without picture, nor, on the apical half, with a reticu- 

 lation dissolved in bands. 22 

 {Wings of au evenly broad shape, and with an unusually blunt apex. 

 (Tab. X, f. 18, and Tab. XI, f. 9.) XXII. Icterica. 

 Wings of the usual shape or dilated. 23 

 2 o f Flaps of the proboscis very much prolonged. XXIII. Ensina. 

 ( Flaps of the proboscis short, or but little prolonged. 24 



24 ( Pattern of the picture not radiating. XXIV. Tephritis. 

 1 Pattern of the picture radiating. 25 



The whole or nearly the whole surface of the wings with a unicolor- 

 ous reticulation. XXV. Euaresta. 



25 \ A star-shaped black picture on the apex, the remaining surface 

 immaculate, or with very few spots, at the utmost with a very 

 faded reticulation. XXVI. Urellia. 



21 \ 



