286 NORTH AMERICAN TRYPETINA. 



SYN. Trypeta alba LOEW, Berl. Entom. Zeitschr. V, p. 345, 72, Ib.,Dipt. 



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

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



Hob. 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. albidipeiinis Lw. $ J. (Tab. XI, f. 10.) Nigro-cinerea, 

 thoracis dorso albicante, capite, thoracis vitta lateral! scutelloque sul- 

 phureis, alarum albidarum stigmate fusco, terebr& fcemiuae 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. 0.180.19. 



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 



Hob. Pennsylvania (Osten-Sacken). 



Observation. The antennas 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. Vernoniae Lw. 9. (Tab. XI, f. 8.) Dilute lutea, capite, 

 thoracis vitta marginali in pleuras dilatata, scntelloque purius flavis, 

 thoracis dorso subhelvo, metanoto nigro ; alarum ditnidium basale 

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

 fluentibus, ita ut fasciae tres valde inaequales fuscse conspiciantur ; prima 

 incompleta et obsoletiore, secunda integra, tertia postice abbreviata. 



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- 



