62 DIPTERA 
short, oral cavity wide, proboscis retracted, palpi spatulate, fleshy, bare; cheeks broad behind. 
Humeral, posthumeral, notopleural, supra-alar, two posterior dorsocentral and four scutellar bristles 
present and yellow, notal hairs short. Pygidium large and erect, about twice as high as abdomen, 
lateral valves prominent; ovipositor elongate, formed from the polished 6-8 segments together with the 
styles. Legs simple, not ciliate. Wings normal, as in Awthalia. ; 
Type species : 4. Pallida, Zetterstedt. Zetterstedt questioned the propriety of including his 
species in AntAalia. 
Geographical distribution. ; 
The species occurs in North America as well as in Europe, specimens having been studied from 
Fall's Church, Va. (Banks); Plummer's Island, Md., from blossoms of wild plum (Shannon); Aylmer 
and Hull, Quebec (Curran), and Atherton, Mo (Adams). The following is the only known species. 
1. A. fallida, Zetterstedt, Lappon. p. 539 [1838] (4nthalia); Dipt. Sc. Vol. i, North Europe; North 
p. 253 [1842] (Anihalia; Wahlgren, Ent. Tidskr. Vol. 31, p. 80 — America. 
[1910] (Euthyneura). 
5. GENUS CEDALEA, MEIGEN. 
CEdalea, Meigen, Syst. Beschr. Vol. 2, p. 355 (1820); Macquart, Dipt. N. France, Vol. 3, p. 141(1827);. 
Hist. Nat. Dipt. Vol. r, p. 321 (1834); Meigen, Syst, Beschr. Vol. 7, p. 77 [1838] (Gzdalia); 
Zetterstedt, Fauna Ins. Lappon. p. 537 (1838); Blanchard, Hist. Nat. Ins. Vol. 3, p. 581 [1840] 
(ZEdalea); Westwood, Gen. Syn. p. 133 (1840); Zetterstedt, Dipt. Scand. Vol. 1, p. 245 (1842);: 
Boitard, Man. Ent. Vol. 3, p. 317 (1843); Walker, Ins. Brit. Dipt. Vol. r, p. 111 (1851); Rondani, 
Dipt. Ital. Prodr. p. 152 (1856); Bigot, Ann. Soc. Ent. France (3), Vol. 5, p. 559 (1857); Schiner, 
Fauna Dipt. Aust. Vol. 1, p. 8o (1862); Lioy, Atti Instit, Ven. 1864, p. 724 (1864); Bigot, Ann. - 
Soc. Ent. France (6), Vol. 9, p. 115 (1889); Melander, Trans. Am. Ent. Soc, Vol. 28, p. 256 
(1902); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 254, 260 (1903); Melander, Williston Man. N. 
Amer. Dipt. p. 224 (1908); Kertesz, Cat. Dipt. Vol. 6, p. to4 (1909); Coquillett, Proc. U.S. Nat. 
Mus. Vol. 37, p. 578 (1910); Lundbeck, Dipt. Dan. Vol. 3, p. 193 (1910); Wahlgren, Ent. Tidskr. 
Vol. 31, p. 43, 78 (1910). 
Xiphidicera, Macquart, Hist. Nat. Dipt. Vol. r, p. 356 (1834); Blanchard, Hist. Nat. Ins. Vol, 3, 
p. 583 [1840] (Xiphidiocera); Boitard, Man. Ent. Vol. 3, p. 324 (1843); Bigot, Ann. Soc. Ent. 
France (3), Vol. 5, p. 560 [1857] (Xyfhidicera); Lioy, Atti Ist. Veneto Sc. Venezia, 1864, p. 722 
(1864); Meunier, Bull. Soc. Ent. France, 1894, p. IX (1894); Coquillett, Proc. Ent. Soc. Wash. 
Vol. 5, p. 259 (1903). 
Characters. — Moderately stout, rather small species with robust hind femora and greatly 
elongated antennae. Head globose, eyes bare, of the female well separated, of the male contiguous on 
the front, with the antennz inserted below the middle of the head, upper facets scarcely larger than the 
lowermost; basal joints of the antennze small but distinct, the third joint greatly lengthened, more or 
less cylindrical and from four to eight times as long as broad, tipped with a short two-jointed style, the 
apical joint of which is minute and bristle-like, the style variable in length, sometimes almost wanting ; 
proboscis short or protruding obliquely forward nearly as far as the head-height, palpi minute; ocellar 
triangle not elevated, ocellar and vertical bristles poorly developed. Thorax quadrate, finely pubescent, 
only the prescutellar, dorsocentral, two or three notopleural, one postalar, and about six scutellar bristles 
present. Abdomen conical, the female with chitinized ensiform ovipositor, the male with a very small 
