DESCRIPTION OF THE SPECIES. 287 



dilate, the apical half shows a very coarse brownish reticulation, the 

 large hyaline drops of which coalesce in such a manner, that three 

 brown, irregular crossbands are formed ; the first is only incompletely 

 developed and rather faded, the second complete, the third abbreviated 

 posteriorly. Long. corp. £ 0.1S, £> cum terebra 0.22; long. al. 0.17 

 —0.18. 

 Syn. Trypeta Vernonue Loew, Berl. Entom. Zeitschr. V, p. 346, 74, and 

 Dipt. Amer. Cent. I, p. 40, 74. 

 Trijpeta Vernonia: Loew, Monographs, etc., I, p. 101, 20. 



Hab. Pennsylvania (Osten-Sacken) ; on the iron-weed ( Ver- 

 non ia). 



Observation. — T. Vernonise agrees in all the plastic characters, 

 especially in the structure of the head and the shape of the wings, 

 with the two preceding species in a very striking manner, and 

 the presence of a picture on the wings alone is not a sufficient 

 ground for a generic separation. 



39. T seriata Lw. % . (Tab. X, f. 18.) — Lutea, alis concoloribus, 

 totis sequalibus et obtusis, per maculas minutas fuscas seriatim disposi- 

 tas reticulars, adversus margiuem praeter trientem basalem nigricanti- 

 bus, vena longitudinali tertia setosa. 



Clay-yellow ; wings of the same color, of a very equal breadth, obtuse at 

 the end, reticulate with small brown spots arranged in rows; blackish 

 along the margin, except on the proximal third of its extent ; third 

 longitudinal vein bristly. Long. corp. 0.24; long. al. 0.2(3 — 0.27. 



Syn. Trypeta seriata Loew, Monographs, etc., I, p. 84. Tab. II, f. 18. 



Hab. Illinois. 



Observation. — Should T. seriata be placed in one of the genera 

 established for the European Trypetina, it would of course be 

 the genus Oxyphora, the most characteristic marks of which are 

 the reticulate wings and the bristles on the third vein. And, 

 indeed, this species reminds one very much of Oxypliora Wester- 

 manni Meig. in the very peculiar shape of the wings, and even in 

 the coloring of the body and the pattern of the picture of the wings. 

 But when we bear in mind that this European species occupies 

 in the genus a very isolated, in fact an artificial position, 1 it will 

 appear more natural to withdraw O. Wcsfermanni from the genus 

 and to form a new genus of it, together with the above described 

 as well as the next following American species. This genus may 

 be called Icterica. 



1 The European Oxyphora Schajfcri Egger shares this exceptional posi- 

 tion, though for other reasons. 



