1014 LIST OF DIPTEEA. 



4, 2. T. Jaceae, Desv. Essai Myod. 766, 1. T. dorsalis, Desv. 

 E. M. 766, 2. Macq. Hist. Nat. Dipt. ii. 467, 27. T. pu- 

 silla, Desv. E. M. 766, 3. T. cylindrica ? Desv. E. M. 767, 4. 

 T. abdominalis, Desv. E M. 768, 7. T. Arctii, Macq. Hist. 

 Nat. Dipt. ii. 467, 25. Walk. Ent. Mag. iii. 68, 4, pi. 1,/. 11. 

 Trypeta punctata? Loeiv, Germ. Zeit. Ent. v. 328, 11. 



a. England. 



b. France. 



c. South of France. Presented by the Entomological Club. 



Trypeta Acidusa, n. s., fem. Fulva, thoracis laieribus fiavo vitta- 

 tis, abdomine fusco, terebra fulva apice nigra, palpis antennis 

 pedibusque fulvis, alis limpidis fulvo Juscoque vittatis et fas- 

 ciatis. 



Body tawny : head and chest beset with some long black 

 bristles, which form a fringe on each side of the crown ; there 

 is also a cross row of short black bristles behind the eyes : head 

 adorned with whitish bloom ; sides of the face without bristles ; 

 epistoma very prominent : eyes purple, flat and partly green in 

 front, where the facets are much larger than elsewhere : sucker fer- 

 ruginous, jointed, bent, clothed with tawny hairs ; palpi pale tawny, 

 beset with black bristles : feelers tawny, as long as the face ; third 

 joint more than four times the length of the second, downy, nearly 

 linear, but very slightly decreasing in depth towards the tip, which 

 is rounded ; bristle black, slender, downy, tawny at the base, very 

 much more than twice the length of the third joint : chest clothed 

 with tawny down ; a yellow stripe on each side : abdomen (exclud- 

 ing the tube) pale brown, oval, clothed with black hairs, narrower 

 and shorter than the chest ; tube tawny, with a black tip, cylindri- 

 cal, longer, and much narrower than the fore part : legs tawny, 

 clothed with short tawny hairs ; claws black ; fore thighs armed be- 

 neath with black bristles : wings colourless, varied with tawny, 

 which proceeds from the base and divides into two forks ; the upper 

 fork is darker than the other, and forms a regular stripe along the 

 fore border for half the length of the wing ; the lower fork is curved, 

 and joins the tip of the upper, with which by afterwards attaining 

 the fore border of the wing it encloses a small colourless space ; a 

 little beyond this it sends forth two branches (united at the base) to 

 the hind border, and is continued to the tip of the wing ; tawny 

 parts partly bordered with pale brown ; wing-ribs and veins tawny ; 

 veins pitchy in the tawny parts of the wing; longitudinal veins 

 straight, with the exception of the third, which is slightly waving, 

 and more deeply curved near the tip ; lower cross-vein oblique, 

 nearly straight, divided by rather less than its length from the 



