DIPTEl 623 



ntmerodrotnia, Hoffm., lias the two fore coxa very long. 

 Sicus, Latr. (Tachydromta, Hi ig.), baa the first or Becond pair of thighs thickei 

 Drapetis, M • i _ . , has the last joint of the antenns subglobose, and th< exserted. 



M . Macquart [as well as Mr. Halidayand Professor Zetterstedt] have established several additional genera, 

 which it iroald occupy too nracli Space to notice in detail. 



The other Tanystoma of our first division have the body generally short, broad, with the 

 exactly applied to the thorax ; the wings extended, and the abdomen triangular. They have, in a 

 word, the appearance of Domestic Flies. The proboscis is often very long. 



Cyrtus, Latr. [Vesiculosa, Latr.], — 

 Intermediate between Empis and Bombylius, with the wings deflexed at each side of the body; the 

 alulets very large, and covering the balancers ; tin- head small and globular ; the thorax very gihhose ; 

 the abdomen vesiculose, and the proboscis directed backwards, or wanting. 



Some bave a proboscis directed backwards. 



Panops, I. am., with antenns longer than the head, cylindric, and 3-jointed, without a terminal seta. 



Cyrtus proper, w ith antenna; very small, 3-jointed, with a setu at the tip. 



Tin' others have do) an extraordinary proboscis. 



Astomella, Duf., has tlie antenna; 3-jointed, with the lost joint forming a compressed, elongated knob, without 

 a seta. 



Henops, llliu r - {Ogcodet, Latr.), has antenna; inserted before the eyes, small, and 2-jointed, with a terminal - 



.iri 1,1 fin, Meig., differs in having the antenna; inserted behind the eyes. 



Bombylius, I. inn. (Bombyliers, Latr.), — 

 lias the wings extended horizontally on each side of the body, with the balancers naked; the thorax 

 higher than the head, or gibhose, as in Cyrtus; the antennae close together, and the abdomen trian- 

 gular, or conical. The proboscis is porrectcd in front, and very long in man] species. The antennae 

 are always 3-jointed, the last being elongated, compressed, fusiform, generally terminated by a very 

 short style, and never by an elongated seta. The palpi are slender, filiform; the legs are long and 

 slender. These insects fly with wonderful rapidity, hovering over flowers without settling, and intro- 

 ducing their long proboscis in order to suck up the honey, and making a sharp buzzing noise. I suppose 

 that their larvae, like those of Anthrax, are parasites. 



Some bave the proboscis evidently longer than the head, very slender, ami pointed at the tip. 



Toxophora, Meig., has tin antenna; as long as the bead and thorax, filiform, pointed at the tip, and the body 

 elongated. 



Xestomyza, V. ied , has -t.'.rtcr antenna-, but the first joint is elongated, and longer than the other joints, and 

 fusiform, as is also the third. 



-'/ Wied., ha- ih- first joint also very long, but cylindrical. In the subsequent sung aera the last 



joint [of the antenns] is the- longest, and sometimes the two basal joints of the antenns are short, and of n. 

 :i length. 



/ ■. Wied., ha-: the head nearly occupied in one sex by the eyes, and the last joint 1. 1' the antenns »erj I 

 nearly linear, compressed, and without a terminal style; the abdomen is voluminous; the proboscis occa- 

 sionally extends beneath ami beyond the extremity of the body, which seems to connect this genus with ('\ it us 

 or] the tribe of Vesiculosa. 



Usia, Latr., has the las) joint of the antenns ovoid, conic, obtuse, or tnmcatt d at the tip, and terminated i 

 style; the palpi not apparent. [South of Europe, or Africa.] 



Pkthiria, Meig., resembles Usia in the antenna:, but with distinct palpi; sometimes the second |oinl Is evidently 

 shorter than the first ,• the last is long, generally almost cylindric, and point* d at the tip. 



/.. mbyliu* proper, has rerj distinct palpi, and the body is clothed with a thick wooUj coating of hairs. B.wu\ 

 I. inn., a verj abundant specie- in tins country]. 



Geroti, '• the last joint of the antenns longer, terminating like an awl, and the wings want 



the transvei m ni > ves near the hind margin. 



Thliptoi ..:.>. \\ ied., i- allied t ■ > the prei eding, and Pbtbiria ; and l presume that 



Amiihix, Wied., also approaches thi m. Both bave the basal joinl of the antenna longer than the second, and 

 cylindrical; the wings of Amictus, howi mtbe] lin era. 



The other species bave the proboscis not longer than the hesd, and thickened at ti I Intof 



I tl D11S is the l.n 



Picas, Latr. {Conophorus, M this |oin1 much thicker than the rest 



Cyllenia, has this joint merel] longer, hut not thii ker, and the abdomen i- mi csl 



Anthrax, Scop. (Anthracti, Latr.), — 

 Similar to the Bombylii, with the body depressed, or but slight!] elevated above; not . . with 



the head as high ami broad as the thoiu\. The antenna- are always ui) smut, and, i vvpt in 



