TRYPETIDAE. 75 



obsolete towards the posterior border, and almost coalesce in its 

 neighborhood. The first of them is also connected with a stripe 

 which edges the fifth longitudinal vein. The edge of the tip of 

 the wing is perfectly connected with the second band, and reaches 

 a little beyond the tip of the fourth longitudinal vein. The anal 

 cell is brownish-yellow. Transverse veins steep ; the small trans- 

 verse vein a little before the last third of the discal cell. 

 Nab. Northern Wisconsin. (Keunicott.) 



9. T. Sliavis LOEW. . (Tab. II, fig. 10.) Pallide flava, unicolor, 

 alarum hyalinarum litura basali fasciisque tribus nigricantibus in formam 

 literae S confluentibus, vena longitudinal! tertia nuda. 



Pale yellow, unicolorous ; wings hyaline, with a blackish basal stripe and 

 three blackish bauds confluent in an S-shaped mark ; third longitudinal 

 vein naked. Long. corp. 0.20. Long. al. 0.21. 



Of this species, very conspicuous by the peculiar picture of its 

 wings, I unfortunately possess only one individual, much injured 

 in carrying. It is everywhere pale yellow, and its thorax and 

 scutellum have no trace of a paler picture. Hairs very short, 

 whitish-yellow on the upper side of the thorax, rather blackish 

 on the pleura? ; bristles all black. Scutellum with four bristles. 

 Wings hyaline ; the veins at the base of the wing yellowish ; a 

 blackish not very striking stripe runs from the tip of the basal 

 humeral vein to the posterior angle of the anal cell, which is drawn 

 out into a point. The remainder of the picture of the wings con- 

 sists of three very broad, rather blackish bands ; the first runs from 

 the black stigma, widening gradually perpendicularly to near the 

 posterior border, where it is connected with the second, which rises 

 over the posterior transverse vein as far as the costal border, and 

 connects there completely with the third band which seams the tip 

 of the wing. The connection of the first and second bands is 

 somewhat interrupted by a clear incision reaching from the poste- 

 rior border a little into the discal cell. Above the end of this 

 incision there is another clear spot. Stigma small ; none of the 

 longitudinal veins unusually curbed ; the small transverse vein is 

 somewhat before the middle of the discal cell and below the very tip 

 of the first longitudinal vein ; the posterior transverse vein is only 

 a little arcuated ; the two transverse veins are steep, not perfectly 

 perpendicular. 



Hob. Middle States. (Osten-Sacken.) 



