DISTRIBUTION OF INSECTS 2^ 



Megastizus speciosus Drury, bag worm, Thyridopteryx ephemeraeformis 

 Haw, saddle back caterpillar, Sibine stimulea Clem., nine pronged wheel 

 bug, Prionidus cristatus TJnn., harlequin cabbage bug, Murgantia his- 

 trionica Hahn, tulip scale, Lecanium Mipiferae Cook, and Carolina 

 mantis, Siagtnomantis Carolina Linn. Exact records of the occurrence 

 of these forms are rare, and notes in regard to them and their relative 

 abundance will be welcomed. 



Imported insect pests. The formidable list of injurious insects 

 which have invaded the United States from other countries and now 

 cause immense annual losses, illustrate the importance of this subject. 

 Without attempting an exhaustive compilation, the following are some 

 of the more destructive insects. Attacking the apple, pear, cherry and 

 peach; codling moth, Tnietocera ocellana Schiff., apple aphis, Aphis tnali 

 Fabr., apple tree bark \o\xst, Mytilaspis pomorum Bouche, San Jos^ scale, 

 Aspidiotus perniciosus Com%t., ■pe^x ToidigG, Diplosis pyrivora Riley, bark 

 borer, Xyleborus dispar Fabr., pear psylla, Psylla pyricola Foerst, cherry 

 aphis, Myzus cerasi Fabr., and the peach bark borer, Scolytus rugulosus 

 Ratz. These species are well known as dangerous enemies of fruit trees. 



Gypsy moth, Porthetria dispar Linn., elm-leaf beetle, Galerucella 

 luteola Miill., and elm-bark louse, Gossyparia ulmi Geoff., are three bad 

 enemies of elms. The first named does not occur in this state, though it 

 has committed extensive ravages in eastern Massachusetts. Wheat has 

 suffered most severely from the Hessian fly, Cecidomyia destructor Say, 

 the grain aphis, Nectarophora granaria Kirby and from the wheat midge, 

 Diplosis tritici Kirby, while clover is frequently attacked by the clover 

 leaf weevil, Phytonomus pufictatus Fabr., or after it has been dried, by the 

 clover hay worm, Pyralis costalis Fabr. A few other imported pests 

 may be named; asparagus beetles Crioceris asparagi Linn., and 

 C. 12-punctata Linn, onion fly, Pliorbia ceparum Meigen, cow horn fly 

 Haematobia serrata Rob.-Desv., carpet beetle, Anthrenus scrophulariae 

 Linn., larder beetle, Dermestes lardarius Linn., red ant, Monomorium 

 pharaonis Linn, and the croton bug, Phyllodromia germanica Fabr. 



There is hardly a person who can not recognize in the above-named 

 insa:ts, one or more which has caused him considerable loss, while the 

 farmer knows many of them from sad experience. Yet these have all 

 been introduced from abroad and some are still spreading over the 

 country. Of the 73 injurious species regarded by Dr Howard as of first 

 mportance, each causing annual losses running into hundreds of thous 

 ands of dollars, 37 have been introduced, 30 are known to be native, 

 while the original home of 6 is open to question. An effort is being made 



