110 Mr. A. Hempel on Brazilian (Joccidas. Bibionidae. Plecia dorsalis, Macq., Dipt. Exot. i. p. 86 (1838). Three females from Pretoria {W. L. D.), Hippoboscidse. Hippobosca rufipes, Olfers, De Veget. et Anitnat. corp. in corpor. animatis reperiundis, Berol. 1816, p. 101 ; Wiedem., Auss. zweifl. Ins. ii. p. 601 (1830) ; Sehiner, Reise Novara, p. 372 (1866). Hippohosca macuhitn, INIacq., Suites a Buff. ii. p. 638. Hippobosca Wahlenher(/iana, Jaeuuicke, Abh. Seuck. Gesell. vi. p. 406, pi. xliy. fig. 13. Four specimens from Pretoria {IV. L. D.) and Barberton (Rendall) . XVI. — Descriptions of Brazilian CoccidEe. By Adolph Hempel, S Paulo, Brazil. [Continued from vol. vi. p. 398.] Genus Phenacoccus, Cockerell. Phenacoccus spiniferus, Hempel. Adult female oval in form, not very convex; pinkish, both surfaces dusted with a white powder ; about thirty-six short white tufts around the lateral margin ; four anal tufts are .slightly longer than the others. Parasitized females become cylindrical in form and the derm becomes ciiitinized. The marginal tufts are slightly lono-er on the posterior margin than on the rest of the body. Antemia3 of nine joints, joint 3 the longest. Length of antennee varying from '^O to "53 millim. Approximate formula: 3 (1 2) 9 7 8 6 (4 5). Length of the segments of the antennee: (1) 67, (2) 67, (3) 71, (4) 42, (5) 42, (6) 45, (7) 53, (8) 49, (9) 64. All antennal segments bear hairs. Legs ordinary, not bearing many hairs. Length of seg-ments of first pair of legs : femur, with trochanter, 292 ; tibia and tarsus 312. Claw short; digitules large, with expanded ends. Tarsal digitules hair-like, with buttoned ends. Eyes small, conical. Eostrum short, about as wide as long, bearing two hairs. iMentum dimerous, with
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