280 NORTH AMERICAN TRYPETINA. 



i 



Syn. Tephritis asteris Harris, Ins. Injur, to Veg., 3d Edit., p. 620. 

 Acinia solidaginis Fitch, First Report, 66. 

 Trypeta solidaginis Loew, Monographs, etc., I, p. 82. Tab. II, f. 16. 



Eab. New York (Fitch) ; Washington vOsten-Sacken) ; New 

 England (Harris). [Canada. — O. S.] 



Observation 1. — To the description of this species in the 

 Monographs, Vol. I, I may add, by way of correction, that the 

 costal spine of the wings is not altogether wanting, but that it is 

 very short and weak, and hence, in some specimens, hardly visible. 

 The words "the first longitudinal vein alone being hairy," in the 

 observation to the above description, only meant that the bristles 

 upon that vein were more like hairs, and not that this vein alone 

 is provided with bristles ; the third vein also, bears weak, hair- 

 like bristles. 



Observation 2. — Baron Osten-Sacken, having seen the original 

 specimen of Tephritis asteris Harris in Mr. Harris's collection 

 in the museum of natural history in Boston, has settled its iden- 

 tity with Acinia solidaginis Fitch. Harris's name, although 

 based upon an error in the name of the plant upon which this fly 

 undergoes its transformations, would have to be retained, but for 

 the circumstance that Mr. Haliday had previously used it for 

 another European Trypeta. 



Observation 3 — Among the genera established for the Euro- 

 pean Trypetina, Oxyphora is the only one in which T. solida- 

 ginis might, perhaps, be placed. Among the European species 

 Oxyphora Schsefferi Frnf. is nearest to it in its general appear- 

 ance; the outline of the wings reminds somewhat of 0. Wester- 

 manni. The much heavier body, the strikingly broad front, and 

 the much broader cheeks, as well as the peculiar shape of the 

 wings, which are broadly rounded at the tip, the heavy, conical, 

 not at all flattened ovipositor of the female, isolate this species 

 sufficiently to justify the formation of a new genus, for which I 

 propose the name of Eurosta. 



33. T. comma Wied. $>. (Tab. XI, f. 2.)— Sordide rufa ant fusca, 

 capite magno, thoracis dorso, tibiis, tarsisque lutescentibus; alseobtusae, 

 ex fusco nigrse, guttulis niinutis modice dilutioribus adspersse, macula 

 costali trigona, comma fuscurn includente, limbo apiois angustissiino, 

 guttulisque aliquot confertioribus prope venae longitudinalis sextae 

 apicem, hyalinis ; vena longitudinali tertia setosa; scutellum setis 

 duabus instructum ; terebra conica, non depressa. 



