TRYPETIDAE. 77 



includes the tip of the third longitudinal vein. Both transverse 

 veins are straight and perpendicular. 

 Jfab. Middle States. (Osteu-Sacken.) 



11. T. polita LOEW. 9. (Tab. II, fig. 12.) Atra, nitida, capite 

 pedibusque flavis, scutello tuniido, alarum albido-hyaliuarum macula 

 basali atra fasciisque tribus latissimis fusco-nigris. 



Deep black, shining ; head and legs yellow, scutellum inflated ; wings 

 whitish-hyaline with a basal black spot and three very broad brownish- 

 black bauds. Long. corp. 0.25. Long. al. 0.17 0.18. 



Belongs to the relationship of the European Tryp. Wiedemanni 

 Meig., the species of which chiefly agree in their inflated scutellum 

 and short wings, while they differ among each other much in the 

 structure of their face. Front bright yellow, beautifully yellowish- 

 brown above, considerably broad ; frontal bristles black. Antennas 

 yellowish, descending to the middle of the face, and having a black 

 bristle, the pubescence of which is exceedingly short and hardly 

 visible. Face whitish-yellow, a little receding, its middle rather 

 flat ; border of the mouth not prominent at all ; opening of the 

 mouth rather small ; proboscis and palpi short. The inferior part 

 of the occiput is whitish-yellow, the superior blackish. Thorax 

 rather convex, altogether glossy black, bare, but the broad lateral 

 stripes are bordered everywhere with a row of yellowish short 

 hairs, and the broad middle stripe is divided by a longitudinal row 

 of such hairs. Bristles black. Scutellum shining black, very con- 

 vex, as if inflated. Metanotum black, with an indistinct whitish 

 reflection. Pleurse shining black, with a few stiff yellowish hairs 

 and some black bristles. Abdomen black ; the hairs rather stiff, 

 whitish on the posterior part of the first segment ; on the second 

 and third segments they are black, except the hindmost ones of the 

 posterior border, which are whitish; on the two last segments they 

 all are whitish. Borer shining black, flattened, pointed, abundantly 

 as long as the abdomen, with very short black hairs. Legs dirty 

 fuscous-yellow; femora not much incrassated, the anterior ones 

 with a few black hairs on the under side. Wings short and rather 

 broad, having the transverse veins very approximated and perfectly 

 perpendicular; they are rather whitish, with very broad brownish- 

 black bands. Their innermost base is yellowish, then follows a 

 large triangular rather deep black spot, which reaches from the 

 costal border as far as the axillary incision of the wing, and only 



