XXXII 73. MUSCIDÆ: 15 genera, comprising 36 native species, mostly very common, and many superabundant throughout summer by reason of rapid breeding. XXXIII 74. ANTHOMYIDÆ: 4 sub-families (MYDÆINÆ, ANTHOMYINÆ, HOMALOMYINÆ, CŒNOSINÆ), 36 genera, and nearly 300 native species; difficult to characterise, but many rather resemble the lesser house-fly in size, and more or less in appearance, habit, and life-history, but some seem attracted rather more to flowers and others drawn only towards dung. XXXIV 82. CORDYLURIDÆ: 29 genera; absence of squamæ apparent; otherwise generic features and general sizes and bodily shapes of species vary considerably. The yellow cow-dung fly, _Scatophaga stercoraria_, is the commonest species of this large family. XXXV 89, 116. PHYCODROMIDÆ: sea-shore flies. XXXVI 80. HELOMYZIDÆ: 8 genera; the costa of wings very "pectinate"; wings large and abdomen small. XXXVII 78. HETERONEURIDÆ: 3 native species; smallish elongated wings; the larvæ, which live in rotten wood, can jump, somewhat like the cheese-hopper maggots. XXXVIII 86, 95. SCIOMYZIDÆ: 11 genera; slender flies with tinted brownish wings; larvæ aquatic. XXXIX 101, 135. PSILIDÆ: 4 genera. XL 103, 109. MICROPEZIDÆ: 6 native species. XLI 87, 104. ORTALIDÆ: about 20 species; smallish flies; some common in pastures; legs short and stout. XLII 97. TRIPETIDÆ: numerous small species; larvæ in stems of plants, or galls thereon, some leaf-miners. XLIII 92. LONCHÆIDÆ: some are of a plump figure and a dark metallic blue or green, others more slender and yellow, grey, or black. XLIV 93. SAPROMYZIDÆ: 21 species. XLV 139. OPOMYZIDÆ: 5 species; life-history unknown. XLVI 83, 102, 121, 136. SEPSIDÆ: several are common small dung-flies, with black bodies, somewhat ant-like. XLVII 120. PIOPHILIDÆ: the "cheese-hopper" maggots are larvæ of _Piophila casei_; seven other species. XLVIII 132. GEOMYZIDÆ: 12 species. XLIX 113. EPHYDRIDÆ: nearly 100 species; life-history of few known. L 114, 131. DROSOPHILIDÆ: larvæ leaf-miners. The pale yellow "fruit-fly," _Drosophila fenestrarum_, loves the cider-press and fermenting fruit. LI 111. CHLOROPIDÆ: numerous family; in the genus _Chlorops_ are many beautiful little flies. LII 129. MICHILIDÆ: 2 native species. LIII 127, 138. AGROMYZIDÆ: some are leaf-miners. LIV 68, 125. PHYTOMYZIDÆ: leaf-miners. LV 126. ASTIADÆ: 2 species; life-history unknown. LVI 106. BORBORIDÆ: first tarsal joint (C, 1, 5) of hind leg conspicuously thick and short; small species of the genera _Borborus_ and _Spherocera_ often abound in the dung-pits of mews. The larvæ of some have been found on rotting potatoes and on confervæ. LVII 140. PHORIDÆ: a numerous family of small flies; 6 genera. LVIII 144. HIPPOBOSCIDÆ: the females of some shed their wings, and all live a lice-like life attached to animals. LIX 143. BRAULIDÆ: eyeless and with strangely atrophied body appendages; found in bee-hives.