356 INSBCTA. 



gated, and the abdomen conical, or almost cylindrical and con- 

 vex*. 



PipizA, Meig. — Psilota, 3Ieig. — Eristalis, Fab. — Milesia, Lat., 



Where the posterior legs are merely somewhat larger than the others, 

 and the abdomen is depressed, semi-elliptical and rounded at the end. 

 The eyes are pubescent. These Insects are closely allied to Syrphus, 

 and particularly to Chrysogaster, Meig. | 



Brachyopa, Hoff., Meig., 



Distinguished from all the preceding subgenera by the wings, which 

 extend considerably beyond the abdomen. These Diptera closely 

 resemble the Milesise, and appear to lead to Rhingia, the last sub- 

 genus of this tribe. According to Meigen the seta of the antennae is 

 pilose at base, but I never could discover those hairs in any of the 

 specimens I obtained. To this subgenus the same naturalist refers 

 the Osoinis olivce of Fabricius, which most certainly belongs to the 

 Muscides J. 



In those Syrphidae, of which we have hitherto spoken, the pro- 

 boscis is shorter than the head and thorax, and the projection forms 

 a short and perpendicular rostrum. We now proceed to others in 

 which that proboscis is evidently longer and almost linear, and the 

 anterior projection of the head is proportionally more elongated, and 

 directed forwards in the manner of a pointed rostrum. These In- 

 sects, in their wings, which are incumbent on the body, and in the 

 form of their antennas, closely resemble the Brachyopse and Milesise. 

 The thighs are simple. They form the 



Rhingia, Scop., Fab., Meig. § 

 The genus 



Pblecogera, Hoffmanseg, 

 Figured by Meigen, is unknown to us, but it is easily distinguished 

 from all those whose antennae are shorter than the head, by the seta 

 of the same organs, Avhich is short, thick, slightly silky, cylindrical, 

 and divided into three joints, the last of which is somewhat the 

 longest. The palette almost forms a reversed triangle. 



The sucker of all the remaining Athericera consists of but two setae, 

 the superior representing the labrum, and the inferior the ligula. 



They form three other small tribes which will correspond to the 

 genera CEstrus and Conops of Linnaeus, and to the Musca, Fab. as 

 originally composed. 



As Stomoxys and Bucentes are connected with this last genus, we 

 will begin with the tribe of the CEstrides consisting of the genus 



* See Meigen, genera Mylesia, Tropidia. The palette of the antennae of the Tro- 

 pidiae is proportionally wide, and as if truncated, or very obtuse.^ 

 f Idem, genera Pipiza and Psilofa. 

 X See Meigen, 

 ;§ Fab., Lat., Meig., &c. 



