TRYPETIDAE. 101 



with whitish above, with a short, whitish pubescence and black 

 bristles ; scutellum with four bristles. Abdomen with black hair. 

 Borer of ? flattened, black, with black hair ; a little longer than 

 the three last joints of the abdomen taken together. Feet brown- 

 ish-black, trochanters, knees, tip of the tibiae and the tarsi yellowish 

 ferruginous. Wings whitish, stigma brown, all the veins, except 

 the first longitudinal one, bare, pale yellow on the basal part of 

 the wing, brown beyond it. 



Hah. Pennsylvania. (Osten-Sacken, on Vernonia, in August.) 



20. T. vernoniae Loew. %' and $ . (Loew, Berl. Entom. Zeitsch. 

 1861, p. 346.) — Helva, metanoto nigro, capite, thoracis vitta laterali, 

 superiore pleurarum parte et scutello pallidius, antennis, terebra, pedi- 

 busque obscurius flavis ; alarum dimidio apicali fasciis tribus fuscis 

 subreticulato, prima incompleta et obsoletiore, secunda integra, tertia 

 postice abbreviate. 



Pale yellowish, metanotuni black, head, lateral stripe of the thorax, upper 

 part of the pleura? and scutellum pale yellow, antenna?, borer and legs 

 darker yellow ; apical half of the wing subreticulated with three brown 

 bands, the first of which incomplete and less apparent, the second entire, 

 the third abbreviated posteriorly. Long. corp. 0.18 — 0.22. Long. al. 

 0.17—0.18. 



Head yellow, orbit of the eyes narrow, with a silvery reflection. 

 Antennae ochreous, third joint oblong, bristle almost bare. Oral 

 opening rather large, rounded, proboscis not geniculated, palpi 

 moderate. Eyes large, oblong. Thorax above clothed with a 

 short, whitish pubescence, and with faintly brownish bristles. 

 Scutellum flat, with four bristles. Metanotum black, dusted with 

 whitish. Abdomen yellowish luteous (ex helvo luteum), with black 

 hairs on the lateral margin and on the last segments ; remaining 

 portion with yellow hairs. Borer of 9 ochraCeous, shining, some- 

 what flattened, equal to the three last abdominal segments taken 

 together, clothed with soft, blackish hair. Legs fulvescent. 

 Wings subhyaline, subreticulated with fuscous by means of three 

 irregular transverse bands and some small apical spots ; the first 

 band, which is much abbreviated posteriorly, starts from the infus- 

 cated base of the stigma and runs obliquely towards the central 

 transverse vein and frequently becomes obsolete, leaving, however, 

 a brown cloud on the transverse vein ; the second band is narrow 

 and straight, exteuding from the costa to the posterior margin ; 

 the third band is unequal, abbreviated posteriorly, and coalescent 



