232 NORTH AMERICAN TRYPETINA. 



7. T. VUlnerata n. sp. $ 9 . — Fusco-nigra, infra fusca ; caput ex- 

 albidum, fronte et facie ochraceo-vittatis, anteunis, palpisque lutescen- 

 tibus ; scutellum subtumidum, setis quatnor praeditum ; pedes lutei, 

 femoribus tamen posterioribus fusco-nigris ; alas latiusculae, cellula 

 stigmaticali brevissima, quadrata, cellula marginali lata et cellula pos- 

 teriore prima adversus apiceui angustata instructae, fasciis nigris inter 

 se cohserentibus similiter atque Aciurce lychnidis P., pictae, colore tamen 

 nigro adversus alarum basim latius diffuso. 



Blackish-brown, under side brown ; head whitish, front and face with an 

 ochre-yellow longitudinal stripe, antenna? and palpi more clay-yellow- 

 ish ; scutellum rather tumid, with four bristles ; feet clay-yellowish, 

 the posterior femora, however, brownish-black ; wings rather broad, 

 with a short, square stigmatical cell, a broad marginal cell and a first 

 posterior cell, which is attenuated at the posterior end ; the black, con- 

 nected crossbands almost resemble those of Aciura lychnidis Fab., but 

 the black coloring is more extended towards the basis. Long, corp., $ , 

 0.18, 9 , cum terebra 0.24 ; long. al. 0.18. 



Coloring of a rather shining brownish -bl ack ; the humeral 

 region and the under side of thorax and abdomen brown. Head 

 whitish, front and face with a conspicuous ochre-yellow or almost 

 orange-yellow middle stripe. Antennae clay-yellowish, descend- 

 ing below the middle of the perpendicular, very little concave, 

 face; the first two joints with short black pile; the third with an 

 almost sharp anterior corner ; arista brownish-black with an 

 extremely short pubescence; oral opening of a medium size; the 

 broad palpi do not extend beyond its anterior edge, which is 

 slightly drawn upwards. Cheeks of a very moderate breadth ; at 

 the lower corner of the eye, there is an ochre-brownish spot and 

 a black bristle. The usual frontal bristles black and of a con- 

 siderable length ; between the two black bristles inserted upon 

 the little stripes, coming down from the vertical margin, there is, 

 on each side, a short, white bristle; four similar bristles are 

 inserted upon the posterior vertical margin; the erect pile of the 

 occiput and the cilia of the upper posterior orbit of the eye are 

 white. Thoracic dorsum and pleurae with a very scattered, almost 

 stubble-shaped white pile and black bristles. Scutellum very 

 convex, perceptibly swollen, with four long bristles. The inter- 

 mediate abdominal segments have a more or less distinct pale 

 coloring on the posterior margin ; all segments, with the excep- 

 tion of the posterior one, have some scattered whitish pile towards 

 the posterior margin and blackish pile on the lateral margins ; the 



