Muscidce 303 



base of the antennae usually above the 

 middle of the eye; arista bare; at least 

 two posthumerals and three posterior 

 intraalars present. Parasitic on cater- 

 pillars, etc Tachinid^ 



SYNOPSIS OF THE PRINCIPAL GENERA OF THE MUSCID^ OF THE WORLD 



, Proboscis long, directed forward, adapted for piercing, or oral margin much 



produced, snout-like, 

 b. Oral margin produced snout-like; vibrissa placed high above the oral 

 margin; antennal arista either pectinate or more or less plumose. 



c. Anteimal arista short or long-plumose; neither sex with distinct 

 orbital bristles. 



d. No facial carina between the antennte Rhynchomyiin^ 



e. Arista short-plumose. R.speciosa. 'Europe. .. .Rhynchomyia R. D. 

 ee. Arista long-plumose. I. phasina. Europe and Egypt. Idiopsis. B.B. 



dd. With flattened carina, the bases of the antennae separated; no abdom- 

 inal macrochset^ CosminiN/E 



C. fuscipennis. South Africa ■ Cosmina 



cc. Antennal arista pectinate; bases of the antennae separated by a flat- 

 tened carina RhiniiNjE R. D. 



d. Cell R5 open, or closed at the margin. 



e. Third segment of the antenna twice as long as the second; claws of 

 both sexes short; cell Rs open. I. lunata. Eastern Hemisphere. 



Idia Meigen 



ee. Third segment of the antenna three times as long as the second; 

 cell Rs open or closed; claws of the male long and slender, of the 

 female shorter than the last tarsal joint. I. mandarina, China. 



Idiella B. B. 



dd. Cell Rs petiolate Rhinia; and Beccarimyia Rdi. 



bb. Proboscis long, directed forward, adapted for piercing STOMOXIN.ffi 



c. Arista flat, pectinate above with plumose rays; sternopleurals 1:2; 

 bases of the veins Ri and R4+6 without setae; base of the media bowed 

 down; apical cell opens before the apex of the wing. African species 



Glossina Wied. 



d. Species measuring over twelve mm. in length. G.longipennis sxiiiusca.. 

 dd. Species less than twelve mm. in length. 

 e. All segments of the hind tarsi black. 



f. The fourth and fifth segments of the fore tarsi black; antennae 



black (fig. 164) G. palpalis R. D. 



ff. Otherwise marked G. hocagei, tachinoides, pallicera. 



ee. First three segments of the hind tarsi are yellow, the fourth and 

 fifth segments are black, 

 f. Fourth and fifth segments of the first and second pair of tarsi are 

 black. 

 g. The yellow bands of the abdominal segments occupy a third of 



the segment (fig. 165) G. morsitans Westw. 



gg. The yellow band on each segment of the abdomen occupies a 

 sixth of the segment G. longipalpis Wied. 



