PREFACE. Vv 
Two-winged Flies (Diptera). 
Cabbage & Turnip-seed puptentee! Cecidomyia brassice Turnip seed. 
Carrot Fly, Psilarose . . ce ee er CALrOU LOOKS. 
Daddy Longlegs, Vipula olerac qa. . . . «. . . . Roots of Grass, Ke. 
Forest Fly, Deer, Lipoptera cervi . . . . . . ... Hair of Deer. 
Horse, Hippobosca equina . . . . . . Hairof Horses and Cattle. 
Frit Fly, Oscinis frit. . « «+! Oats and Wheat. 
Gad or Small Breeze Fly, ‘Chrysops cecutiens . . . . Men and Animals. 
Gout Fly, Chlorops teniopus. . . a | barley stems: 
Hessian Fly, Cecidomyia destructor . . . . . . . Cornstems. 
Horse Bot Fly, Gastrophilus equi... . . . . . Horses, internally. 
Red Maggot (of) Cecidomyia tritici. . . . . . . . Wheat ears. 
Warble, Horse, Hypoderma (? sp.). . . . . . . . Hides of Horses. 
A Ox, Hypoderma bovis . . . . . Hides of Cattle. 
Willow Midge Maggot, Cecidomyia (larvee is sp. i . . . Bark of Willows. 
Sawflies, Bees, &. (Hymenoptera). 
Hornet, Vespacrabra . . . a eee) invold treesjand wood: 
Leaf-cutter Bee, Megachile centunculari US We sian eA VER: 
Oak Apple (root form), Biorhiza terminalis. . . . . Oak shoots and roots. 
Oak Spangle Galls, Newroterus lenticularis. . . . . Oak leaves. 
Sawfly, Apple, Hoplocampa testudinea . . . . . . Young Apples. 
» Corn, Cephus pygmeus. . eh ae selne Wiheatistems: 
bear -Hinmiocampanlumacina . 4 4) sa) - .-) | 4) bear leaves: 
PEP Linewmloniiynustounimm rn ss an eens ee imerleaves. 
Sires Guanine sineigigdsl.. sls cee 22 bine timiber: 
Aphides, Scale yer &c. (Homoptera). 
Apple-suckers, Psylla mali . . - =. = . « sStemsjof blossom buds: 
Beech-bark Felt Scale, Cr yptococcus jagi 2 ye beechesteme. 
Cabbage Aphis, Aphis brassice . . . . . . Cabbage leaves. 
6 Powdered Wing, Aleyrodes protetel : ee: 53 
Mussel Scale, Mytilaspis pomorum . . . . . . Apple and Pear bark. 
Spruce Gall Aphis, Chermes (pini) abieltis . . . . . Galls.on Spruce Fir. 
Various other insect infestations were present, as of the 
Lesser Earwig, and also the Common Earwig, which had been 
previously reported Locusts, as an imported infestation in 
Lucerne, also gave some trouble; as did also the spread of the 
small striped Cockroach, variously known as the German Cock- 
roach, and (in the United States of America) as the Croton Bug. 
Numerous other kinds of insects, economically injurious as 
affecting woodwork, clothes, carpets, furniture, and linen while 
bleaching, &c., but not coming under the head of agricultural 
pests, were also the subject of enquiry. 
Amongst different kinds of injurious infestations not coming 
under the head of ‘“‘Insect”’ life, various kinds of ‘‘ Mites” 
(which are classed in the order Acarina) were more than usually 
troublesome; and far before them all in importance was the 
constantly increasing spread of the Phytoptus ribis, the “‘ Black 
Currant Mite,” to which I have been giving all the attention in 
