328 NORTH AMERICAN TRYPET1NA. 



( 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. 



14 I 



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

 ts tations along the margin. XIV. Acidra. 

 / Fifth vein strongly bristly; scutellum with six bristles. 



15 •? XV. Blephakonecra. 

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



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



I Wings not banded on the apex. 17 



,- ( Face spotted. 18 



I Face not spotted. 19 



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



XVII. Eptreta. 

 18 i 



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



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



, g ( Front remarkably broad. 20 



I Front narrow, or of medium breadth. 21 



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

 XIX. Eurosta. 

 Third antennal joint remarkably long, with a very sharp anterior 

 angle, ovipositor flattened. XX. Acidogona. 



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



dissolved in crossbands. XXI. Aspilota. 



21 ■! 

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



I lation dissolved in bands. 22 



SWings of an evenly broad shape, and with an unusually blunt apex. 

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



Wings of the usuaS shape or dilated. 23 



00 ( Flaps of the proboscis very much prolonged. XXIII. Ensina. 



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



o , ( Pattern of the picture not radiating. XXIV. Tephkitis. 



( Pattern of the picture radiating. 25 



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

 ous reticulation. XXV. Edaresta. 



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

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

 I faded reticulation. XXVI. Urellia. 



f 



