LIST OF DIPTERA. 1023 



Trypeta Mevama, n. s., fem. Fulva cinereo tecta, abdomine basi 

 cinereo apice nigro, palpis antennis pedibusque fulvis, alls albis 

 apice fusco radiatis. 



Body dark tawny, thinly clothed with tawny hairs, covered with 

 gray bloom, which has a tawny tinge on the breast : head tawny ; 

 sides of the face without bristles ; epistoma not prominent : eyes 

 brassy, adorned with green and purple ; fore part rather flat, its 

 facets larger than those elsewhere : sucker tawny, clothed with 

 tawny hairs ; palpi tawny, beset with tawny bristles : feelers tawny, 

 a little shorter than the face ; third joint nearly linear, downy, very 

 slightly rising on the upper side at the tip, which is truncated, full 

 twice the length of the second joint ; bristle black, tawny and rather 

 thick at the base, rather more than twice the length of the third 

 joint: abdomen obconical, tawny, gray at the base, black and taper- 

 ing towards the tip, much longer than the chest : legs tawny, 

 clothed with short black hairs ; claws black : wings white, adorned 

 near the tip with a large brown spot, which is darkest along the fore 

 border, and sends forth nine rays from its paler part ; it includes 

 two distinct white dots, and along the border are others incomplete ; 

 it has a tawny tinge above the middle cross-vein, which is separated 

 from the lower cross-vein by very little less than the length of the 

 latter ; both are perpendicular ; wing-ribs tawny ; veins black, 

 tawny towards the base ; poisers tawny. Length of the body 1^ 

 line ; of the wings 3 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



Trypeta Aira, n. s., fem. Fulva cano tecta, abdominis apice nigro 

 depresso, palpis antennis pedibusque fulvis, alis longis angustis 

 albis apice fusco radiatis. 



Body tawny, thinly clothed with tawny hairs, thickly covered 

 with hoary bloom, which is less prevalent on the head, and disap- 

 pears beneath the mouth: head and chest beset with tawny bristles; 

 sides of the face without bristles ; epistoma very slightly prominent: 

 eyes purplish black ; fore part rather flat, its facets larger than 

 those elsewhere : sucker and palpi tawny, clothed with tawny hairs : 

 feelers tawny, a little shorter than the face ; third joint conical, 

 downy, about twice the length of the second ; bristle black, slender, 

 downy, about twice the length of the third joint : abdomen about 

 twice the length of the chest, tapering from the base to the tip, 

 where it is flat, black and shining : legs pale tawny, clothed with 

 short black hairs ; claws black : wings white, long and narrow ; 

 a large, irregular, dark brown spot on the fore border, near the tip 

 of the wing, sending forth three rays to the hind border and an ob- 



