ORTALIDjB — DIACRITA. Ill 



proves it conclusively. Not less certain, according to my opinion, 

 is the fact that Wiedemann's Trypeta picta and the Tephritis 

 conica of Fabricius's Systema Antliatorum are synonyms. 

 What Wiedemann says about the feet of his Trypeta picta clearly 

 proves that he had examined the type in Fabricius's collection ; 

 moreover, Fabricius's description contains nothing to render this 

 identification of Tephritis conica doubtful. In the preface to his 

 first volume, Wiedemann gives a large number of synonymic and 

 systematic emendations, the result of the examination of Fabri- 

 cius's collection, undertaken by him; among them we find the 

 statement that Tephritis conica and Dictya picta are the same 

 species. But as Dictya picta of the Systema Antliatorum is 

 nothing else but the Musca, picta of the Entomologia Systema- 

 tica, the synonymy of Musca picta F. with Trypeta picta Wied. 

 and the above described Gamptoneura picta seems to be suffici- 

 ently established. The correctness of this view seems confirmed 

 by the fact, that Musca picta F. was described from a North 

 American specimen, and that hitherto, besides Camptoneura 

 picta, which has a wide range and is a common species, no other 

 North American species is known which might come in conflict 

 with it. 



Gen. III. DIACRITA Gerst. 



Charact. — Body rather robust. Pubescence everywhere very short ; thorax 

 with some bristles upon the posterior and lateral margins only. 



Antennoz of medium length ; the oval third joint longer than the only 

 moderately sized second joint. The face, retreating above between 

 the rather short antennal fovese, and obtusely carinate ; below, it 

 is again projecting and convex. 



Palpi rather large, mentum swollen. 



Wings narrow and long, the first longitudinal vein bristly at its end 

 only; the third and fourth longitudinal veins converging towards 

 the end ; posterior angle of the anal cell drawn out in a very long 

 point. 



This genus contains brown or brownish-yellow species, rather 

 opaque on account of the pollen which covers them ; the thorax 

 is usually spotted with black ; the wings, on the anterior margin 

 and the apex, have a broad black border. 



1. D. COStalis Gerst. % .—(Tab. VIII, f. 14.) Fusca, polline cinereo 

 aspersa, thoracis raaculis nigris ante suturam sex, pone suturam duabus, 

 binisque minutissimis utrinque adjectis. 



