29G NORTH AMERICAN TRYPETINA. 



flaps of the proboscis, and placing them in the genus Ensina, 

 then the difference between Oxyna and Tephritis is rendered so 

 very subtle, as to become unavailable for my essay of a classifi- 

 cation of North American Trypetina, based as it is upon very 

 insufficient materials. The question arises, therefore, whether it 

 would not be better, temporarily, to bring together all the species 

 to be described below (with the exception of the Urellise) under 

 the head of the genus Tephritis, or else to distribute those species 

 in genera on some other principle. The latter course seems to 

 me preferable, in rendering the determination of the species 

 easier. I would propose to call Tephritis those species, the 

 picture of the wings of which does not form at the apex distinctly 

 developed rays, and those which have such rays would form a 

 new genus Euaresta. Most species will then gain a position in 

 conformity to their true relationship, as well as to their habitual 

 affinities ; and although it cannot be denied that the location of 

 some species will thus be rendered somewhat artificial, this dis- 

 advantage cannot well be avoided as long as the knowledge of 

 the American fauna is not more complete than it actually is. 



That Trypeta angustipennis belongs to the genus Tephritis 

 results from the foregoing explanation. 



44. T. final is Loew. % 9. (Tab. XI, f. 4.) — Cinerea, capite pedi- 

 busque luteis, proboscide non geniculate, alis nigro-reticulatis, fascia 

 obliqua hide a stigmate trans venas transversales ad posticum alze mar- 

 ginera dueta, maculisque duabus altera subapicali, cost® contigua et 

 altera apicali 11011 reticulatis, stigmatis nigri basi dilutissiine subflaves- 

 cente, vena longitudinali tertia nuda. 



Cinereous; head and feet clay-yellow; proboscis not geniculated ; reticu- 

 lation of the wings black ; a crossband running from the stigma over 

 the crossveins, a spot near the anterior margin before the apex, and 

 another one on the apex, are not reticulate ; the basis of the black 

 stigma is of a very faint yellow; the third longitudinal vein is not 

 bristly. Long. corp. %, 0.16; cum terebra 0.24; long. al. 0.20—0.21. 



Syn. Trypeta Jinalis Loew, Dipt. Am. Cent. II, 78. 



Cinereous, thorax and abdomen without any picture. Head, 

 antennae, and palpi rather dark yellow, the larger part of the 

 occiput dark brown. The front is of a very moderate breadth ; 

 its usual bristles are black. The antennae do not reach to the 

 anterior edge of the mouth; their second joint does not bear a 

 longer bristlet ; the anterior corner of the third joint is rounded; 



