140. MUSCA GAVISA, n. s. (n. subg. Neomyia). _Foem._ Purpurea,
pubescens capite nigro, facie subobliqua, palpis antennis pedibusque
nigris, abdomine lato crasso, alis fuscescenti-cinereis basi
nigricantibus, alulis obscurioribus. _Var. β._ Viridescenti-cyanea,
scutello purpureo.
_Female._ Brilliant purple; head black, shining, narrower than the
thorax; frontalia dull, linear; face slightly oblique; palpi and
antennæ black, the latter not reaching the epistoma; thorax and abdomen
with thick black pubescence; abdomen very thick, shorter and much
broader than the thorax; legs black; wings brownish grey, blackish at
the base; veins black; præbrachial vein forming a much-rounded and very
oblique curve at its flexure, hardly curved inward from thence to its
tip; discal transverse vein hardly undulating, parted by much more than
half its length from the border, and by much less than its length from
the flexure of the præbrachial; alulæ dark brownish grey. _Var_. β.
Bright greenish blue; scutellum purple. Length of the body 5 lines; of
the wings 10 lines.