286 NORTH AMERICAN TRYPETINA. 



Syn. Trypeta alba Loew, Berl. Entom. Zeitschr. V, p. 345, 72, lb., Dipt. 

 Amer. Cent. I, p. 39, 72. 

 Trypeta alba Loew, Monographs, etc., I, p. 100, 18. 



Hab. Pennsylvania (Osten-Sacken). 



Observation 1. — I have only the following remarks to make 

 concerning this species, described in the above-quoted places and 

 easily recognizable. The antennae are often not clay-yellow, but 

 more or less bright ochre-yellow, which is especially the case in 

 the best preserved and fully colored specimens ; in such speci- 

 mens the face is pale sulphur-yellow, while, on the contrary, the 

 front, probably in consequence of desiccation, shows, in other 

 specimens, a more dark yellow, often impure, hue. 



Observation 2. — This and the next following species show a 

 striking agreement in all plastic characters, especially in the 

 structure of the head, and the characteristic outline of the wings, 

 so that they may be considered as the types of a new genus, dis- 

 tinguished from the related ones by the above-mentioned charac- 

 ters, and which may be called Aspilota. 



31. T. alMdipennis Lw. % £. (Tab. XI, f. 10.)— Nigro-cinerea, 

 thoracis dorso albicante, capite, thoracis vitta laterali scutelloque 'sul- 

 phureis, alarum albidarum stigmate fusco, terebra foeminae atra. 



Blackish-gray, thoracic dorsum whitish; head, a stripe on the lateral 

 margin of the thorax, and the scutellum sulphur-yellow ; wings whitish 

 with a brown stigma ; the ovipositor of the female black. Long. corp. 

 % 0.17, 9 cum terebra 0.20; long. al. 0.18—0.19. 



Syn. Trypeta albidipennis Loew, Berl. Entom. Zeitschr. V, p. 345, 73, and 

 Dipt. Amer. Cent. I, p. 39, 73. 

 Trypeta albidipennis Loew, Monographs, etc., I, p. 100, 19 



Hab. Pennsylvania (Osten-Saeken). 



Observation. — The antennae are usually more ochre-yellow than 

 ferruginous-yellow. The generic location of this species has been 

 mentioned in the note to the preceding one. 



38. T. Yernoniae Lw. % 9. (Tab. XI, f. 8.)— Dilute lutea, capite, 

 thoracis vitta marginali in pleuras dilatata, scutelloque purius fiavis, 

 thoracis dorso subhelvo, metanoto nigro ; alarum dimidium basale 

 impictum, apicale colore subfusco grosse reticulatum, guttis magnis con- 

 fluentibus, ita ut fasciae tres valde inaequales fuscaeconspiciantur ; prima 

 incomplete et obsoletiore, secunda integra, tertia postice abbreviate. 



Pale clay-yellowish ; head, a lateral thoracic stripe, dilated upon the 

 pleurae, and the scutellum of a purer yellow, thoracic dorsum more 

 isabelle-yellow, metanotum black ; the basal half of the wings is imma- 



