[Illustration: 166. Pycnosoma marginale. (×4.) After Graham-Smith.] f. Squamula thoracalis broadened mesad and caudad as far as the scutellum. g. Sternopleural macrochætæ arranged in an equilateral triangle; front of both sexes broad; genæ bare; dorsocentrals six, small; wing not rilled. (To COENOSINÆ). _Atherigona_ Rdi. gg. Sternopleural macrochætæ when three are present, arranged in a right triangle. h. Last section of M_{1+2} with a more or less rounded angle (fig. 163l). i. Eyes of the male pilose or pubescent, of the female nearly bare; m-cu crossvein usually at or proximad of the mid-distance between the r-m crossvein and the bend of M_{1+2}. P. (= _Placomyia_ R. D.) _vitripennis_. _Plaxemyia_ R. D. ii. Eyes bare; the m-cu crossvein always nearer to the bend of M_{1+2} than to the r-m crossvein. j. Apex of the proboscis when extended reveals a circlet of stout chitinous teeth. P. INSIGNIS Austen, of India, bites both man and animals. (= _Pristirhynchomyia_.) PHILÆMATOMYIA Austen jj. Apex of the proboscis without black teeth. k. Eyes of male separated by a distance equal to a fourth the width of the head. House or typhoid fly. M. DOMESTICA L. Widely distributed. MUSCA L. kk. Eyes of the male contiguous. E. CORVINA. Europe. EUMUSCA Town hh. Last section of M_{1+2} with a gentle curve (fig. 102). i. Eyes pilose. j. Claws in the male somewhat elongated; no orbitals in either sex; antennæ separated at the base by a flat carina; abdomen marked with red or yellow. _G. maculata._ Europe and America. _Graphomyia_ R. D. jj. Claws short and equal in the two sexes; two or three stout orbital macrochætæ in the female; R_1 scarcely produced beyond the r-m crossvein; eyes contiguous in the male. _P. obsoleta._ Brazil. _Phasiophana_ Br. ii. Eyes bare; fronto-orbital macrochætæ in a double row, antennæ contiguous at the base. j. One or more pairs of well developed anterior inner dorsocentral (acrostichal) macrochætæ; seta on extensor surface of hind tibia. M. ASSIMILIS, STABULANS, etc. Europe and America. MUSCINA R. D.