TRYPETIDAE. 61 



adjoining it, and lying before the last longitudinal vein. The 

 transverse humeral vein, and the space of the costa near it, are 

 usually black as well as the space of the latter, where the costal 

 spine is inserted. The brownish-yellow bands of the wings have 

 narrow brown edges, and are in a greater or less extent brown 

 near the tip and the posterior border of the wings. There are 

 specimens in which the bands are much more extended, but those 

 having a part of them obsolete are more common ; this fading of 

 the picture of the wings is most frequent in the neighborhood of 

 the posterior border. The posterior transverse vein is a little 

 oblique; the tips of the third and fourth longitudinal veins are 

 curved. The circumference of the wings is not always the same in 

 the males ; those the frontal bristles of which are most thickened 

 appear to have the most prolonged and pointed wings. 



Hab. Middle States. (Osten-Sacken.) 



Observation. — I have had an opportunity of examining the 

 typical individuals of Tryp. longipennis Wied. 



3. T. fratria Loew. £. (Tab. II, fig. 4.) — Tota lutea, thorace non 

 vittato, alarum rivulis fasciisque luteo-fuscanis, maculam ovatam pellu- 

 cidam in posteriore cellulae discoidalis parte includentibus, vena longi- 

 tudinali tertia setosa. 



Totally luteous yellow ; the thorax without stripes ; the wings with brown- 

 ish-yellow rivulets and bands, including an ovate pellucid spot in the 

 posterior part of tbe discal cell ; the third longitudinal vein with bris- 

 tles. Long. corp. 0.22. Long. al. 0.22. 



Rather dark yellow with the scutellum paler and an almost 

 whitish-yellow, not sharply limited stripe, running from the shoulder 

 to the base of the wing; the metanotum at each side with a dot- 

 like black spot. Front of moderate breadth. Antennas yellow, 

 little longer than half the face, with the bristle apparently bare. 

 Face receding only a little, and slightly excavated below the an- 

 tenna?. Proboscis short ; palpi slightly projecting. Bristles of 

 the thorax black. Uairs of the abdomen short and black. Borer 

 very short, not flattened, concolorous with the abdomen. Legs 

 yellow, tibiae and tarsi paler than the femora; anterior femora with 

 some black bristles on the underside. The picture of the wings is 

 yellowish-brown, and of the same form as that of the European 

 Tryp. Heraclei Linn. The part of it adjacent to the base of the 

 wings reaches from the costal border as far as the dark brownish 



