Muscidcs 305 



e. Veins RI and R4+5 with setae at the base; two equally prominent 

 sternopleural macrochaetae; arista with rays both above and be- 

 low; palpi as long as the proboscis; apical cell of the wing wide 



open. L. tibialis. (Hcematobia B. B. not R. D.) 



Lyperosiops Town. 



ee. Only vein RI+S with basal setae; anterior sternopleural macro- 



chaeta wanting; arista pectinate. 



f. Palpi as long as the proboscis, the latter stout, with fleshy termi- 

 nal labellse; apical cell narrowly open; sternopleural macro- 

 chaetae black. S. maculosa from Africa and related species 



from Asia Stygeromyia Austen 



ff. Palpi much shorter than the proboscis, the latter pointed at the 

 apex, without fleshy labellae; apical cell of the wing wide open. 

 S. calcitrans, the stable fly and related species. Widely dis- 

 tributed in both hemispheres (fig. no) Stomoxys Geof. 



aa. Proboscis neither slender nor elongate, the labellae fleshy and not adapted for 

 piercing. 



b. Hypopleurag without a vertical row of macrochaetae MUSCIN^: 



c. Arista bare; distal portion of Rj+5 broadly curved at the end; hypop- 

 pleurae with a sparse cluster of fine hairs. S. braziliana, Southern 



States and southward Synthesiomyia B. B. 



cc. Arista pectinate or plumose. 



d. Arista pectinate. H. vittigera, with the posterior half of the abdomen 



metallic blue. Mexico Hemichlora V. d. W. 



dd. Arista plumose. 



e. Middle tibia with one or more prominent setae on the inner (flexor) 



surface beyond the middle, or inner surface very hairy, 

 f. RI ends distad of the m-cu crossvein; Ri-fs with a broad curve 

 near its apical end. ( = Neomesembrina Schnabl, = Metamesem- 

 brina Town). M. meridiana. Europe. . . . Mesembrina Meigen 

 ff. RI ends proximad of the m-cu crossvein. 



g. Eyes pilose, sometimes sparsely in the female. 



h. Female with two or three stout orbital setae ; the hind metatar- 

 sus of the male thickened below at the base and penicillate . 



D. pratorum. Europe Dasyphora R. D.* 



hh. Neither sex with orbital setae. 



i. Abdomen without macrochaetae; arista plumose. C. 

 asiatica. Eastern Hemisphere ... Cryptolucilia B. B. 

 ii. Abdomen with strong macrochaetae; arista very short- 

 plumose, nearly bare. B. tachinina. Brazil 



Reinwardlia B. B. 



gg. Eyes bare. 



h. Body densely pilose; thoracic macrochaetae wanting; middle 



tibiae much elongate and bent; last section of RI+S with a 



gentle curve. H. (Mesembrina} mystacea, et al., Europe 



and H. solilaria, N. America. . . . Hypodermodes Town. 



hh. Body not densely pilose. 



*The genus Eudasyphora Town, has recently been erected to contain D. lasiophthalma. 



