162 C. B. Osten Sacken: 



rostrum; eleven-jointed; first Joint elongate, second sliort, subglo- 

 bular; joints of the flagellum longer tlian broad, slightly attenuate 

 at base; the 5 or 6 last joints linear; the joints are not verticillate, 

 but beset with scattered hairs. 



Thorax elongate and comparatively narrow; prothorax Lim- 

 wo6ia-like, that is prolonged into a neck, bearing the head; meso- 

 thorax gibbose, rather narrow (when seen from above); metanotum 

 elongate, its posterior margin roimded; its surface is on the same 

 level with the posterior part of the mesonotum, it may, for this reason, 

 be easily mistaken for the scutellum, 



Abdomen shorter than the wings, but varying in length in 

 different species; male forceps not incrassate, of a simple structure; 

 the elongate basal piece bears a linear horny appendage, folding 

 under, or into it, like a penknife. 



Ovipositor. I have no female of B. dispellens; but I took 

 note in Berlin that another, unnamed species, had the ovipositor of 

 the ordinary structure; valves rather small, narrow, pointed, straight. 



Legs very long and slender, especially the tarsi; bind tibiae 

 with two Short spurs; I do not see any on the front tibiae. 



Wings longer, in some species much longer, than the abdomen. 

 The most striking features of the venation are: the brauch of the 

 second vein is perpendicular, like a crossvein, inserted at the point 

 where the first vein incurves into the second; praefurca rather short, 

 in one line with the remaining portion of the second vein ; the latter 

 moderately bisinuate; the proximal ends of the submarginal and first 

 posterior cells are very near each other; the anterior crossvein short, 

 sometimes almost punctiform; the discal cell is a soraewhat irregulär 

 Square; second posterior cell petiolate; the fifth in narrow contact 

 with the discal. The seventh vein is very short and runs very near 

 the margin of the wing into the anal angle (in B. dispellens the in- 

 terval between them is a narrow, linear strip). — 



Brachypreimna dispellens. 

 Tipida dispellens Walker, Trans. Ent. Soc. N. Ser. V, p. 333. 



Brownish, mesonotum, metanotum and pleurae witli. brown stripes ; 

 tibiae and tarsi cream-white; costal cells brownish; wing-veins clouded 

 with brown. Length g about 15 — 16 mm. 



Front and vertex brownish, the latter faintly paler in the middle ; 

 antennae pale-yellowish, not longer than the head; rostrum yellowish 

 above, brown below; palpi brown, third Joint pale. Ground color of 

 the thorax broAvnish, more whitish on the pleurae; coUar with a 

 short double longitudinal streak in the middle and a lateral brown 



